C. M. Sonsino; Fraunhofer Institute For Structural Durability And System Reliability LBF
The structural durability design of complex welded structures should not rely only on one single design method but should apply different methods for assuring the reliability of the assessment. In...
The structural durability of welded structures is determined by the interaction of different influencing parameters such as loading mode, spectrum shape, residual stresses and weld geometry among...
Recent developments in local concepts of fatigue assessment of welded joints (2009)
Radaj, D., Sonsino, C.M., Fricke, W.
Several lately proposed modifications or variants of the structural stress or strain concepts, of the notch stress or strain concepts (also termed 'local stress or strain concepts') and of the...
Multiaxial fatigue assessment of welded joints - recommendations for design codes (2009)
In the assessment of welded joints submitted to multiaxial loading the calculations method applied, independently of the concept (nominal, structural, hot-spot or local), must consider primarily the...
Optimization of cast iron safety components of commercial vehicles by material selection and geometry under consideration of service loadings. The structural durability of safety components in...
Sonsino, C.M., Hanselka, H., Karakas, Ö., Gülsöz, A., Vogt, M., Dilger, K.
The following investigation provides knowledge about the fatigue behaviour of welded wrought magnesium alloy AZ31 (ISO-MgAl3Zn1). Three different types of joints, fully penetrated and partially...
Effects of LCF on the HCF life of notched specimen in ferritic-bainitic steel (2008)
Biduard, H., Palin-Luc, T., Saintier, N., Dumas, C., El Dsoki, C., Kaufmann, H., ...
Karakas, Ö., Morgenstern, C., Sonsino, C.M.
Investigations were carried out with three different types of MIG- and TIG-welded joints of the magnesium alloy AZ31(ISO-MgAl3Zn1): fully or partially penetrated butt welds, transversal stiffeners....
Current developments and trends on structural durability (2008)
Bacher-Höchst, M., Berger, M., Sonsino, C.M., Vormwald, M.
Basic approaches for assessment of Structural Durability are outlined in principle. Some of their limits in actual application fields and new solutions are shown. Multiaxial Fatigue remains as to he...
In literature, allowable stresses (FAT-values) are established for the fatigue design of welded joints according to the notch stress concept with the reference radii r(ref) = 1.00 mm for thick...
Light-weight design chances using high-strength steels (2007)
Für einen effizienten Einsatz von hochfesten Stählen für den Bau von Leichtbaustrukturen ist es erforderlich, die Interaktion zwischen Betriebsbelastung, Werkstoff, Geometrie und Fertigung zu...
Betriebsfestigkeit von Getriebelagerungen aus Magnesium-Pressgusslegierungen (2007)
Pohl, C., Laakmann, J., Sonsino, C.M., Heim, R., Hanselka, H.
Im Rahmen eines EU-Projekts wurden erstmals am Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit (LBF) neue aussichtsreiche Magnesium-Presslegierungen gemäß den Anforderungen...
Fatigue testing under variable amplitude loading (2007)
There are many publications about variable amplitude test results. However, very often information on load-time histories, spectra and testing details are missing. This fact does not allow the...
Fatigue life assessment of cast nodular iron disc brakes for railway vehicles (2007)
Disc brakes, not only for railway applications but generally in all vehicle applications. count as safety components. Therefore, their reliability during service is essential. A disc brake is...
Advanced local concepts for assessing the fatigue durability of welded joints (2007)
Sonsino, C.M., Radaj, D., Fricke, W.
Some recently developed variants of local concepts for assessing the fatigue strength and structural durability of welded joints are reviewed. These comprise structural stress, notch stress or strain...
Overview on local concepts for the fatigue design of welded structures (2007)
Sonsino, C.M., Radaj, D., Fricke, W.
Recently developed new variants of structural stress, notch stress and fracture me-chanic concepts are discussed. The two new structural stress concepts described first are based on a linearization...
Karakas, Ö., Morgenstern, C., Sonsino, C.M.
The investigations were carried out with three different types of MIG- and TIG-welded magnesium joints of the alloy AZ31. The evaluation of the results showed that the local stress concept using the...
Betriebsfestigkeitsverhalten von Schweißverbindungen unter mehrachsiger Beanspruchung (2007)
Mehrachsige Spannungszustände treten in vielen schwingbelasteten Konstruktionen des Anlagenbaus sowie in tragenden Teilen von Personen- und Nutzfahrzeugen und im Schienenfahrzeugbau auf. Die...
Evaluation of the fatigue behaviour of new PM-materials for highly loaded gears (2007)
Lipp, K., Bender, H.J., Baumgaertner, F., Castro Pinto, F., Sonsino, C.M.
Fatigue life assessment of cast nodular iron disc brakes for railway vehicles (2007)
Disc brakes, not only for railway applications but generally in all vehicle applications count as safety components. Therefore, their reliability during service is essential. A disc brake is...
The structural durability of welded structures is determined by the interaction of different influencing parameters like loading mode, spectrum shape, residual stresses and weld geometry among...
Improving the fatigue performance of welded stainless steels: Final Report (2007)
Maddox, S.J., Hopkin, G.R., Holy, A., Moura Branco, C.A., Infante, V., Baptista, R., ...
Kennwerte der neuen Mg-Legierung MRI-3 unter Missbrauchs-, Sonder- und zyklischen Belastungen (2006)
This report contains the papers of individual presentations held at the 4th International Fraunhofer LBF Meeting of Structural Durability in Railway Engineering: - Research and development of modern...
Methods for improving the fatigue performance of welded stainless steel (2006)
Maddox, S., Branco, C., Schuberth, S., Sonsino, C.M., Küppers, M., Marquis, G., ...
Zukunftsperspektiven für die Pulvermetallurgie durch die Betriebsfestigkeit (2006)
The fatigue behaviour under complex variable amplitude loading cannot be simply assessed by knowledge of constant amplitude data. The peculiarity of variable amplitude loading, which occurs in almost...
Fatigue design with cast magnesium alloys under constant and variable amplitude loading (2006)
For a fatigue design of cast components of magnesium alloys AZ 91 HP, AM 50 HP and AM 20 HP strain and stress controlled fatigue data, influence of notches, main stresses, elevated temperatures and...
Principles of variable amplitude fatigue design and testing (2005)
The proper consideration of variable amplitude loading by utilizing service spectra and appropriate Gassner-lines is essential for the design of light-weight components and structures by allowing...
Betriebsfestigkeitsnachweis von Aluminium-Sicherheitsbauteilen (2005)
Sonsino, C.M., Berg-Pollack, A., Grubisic, V.
Trends in increasing usage of aluminum-alloys for vehicle safety components require to summarize the state of the art related to the approval of their service strength including the aspects of...
For more than half a century, Darmstadt has been a center of essential expertise in structural durability. The institutions involved in both research and design, cover areas ranging from material...
Bewertung lokaler Berechnungskonzepte zur Ermüdungsfestigkeit von Punktschweißverbindungen (2005)
Seeger, T., Greuling, S., Brüning, J., Leis, P., Radaj, D., Sonsino, C.M.
Übersicht über Konzepte zur schwingfesten Bemessung von Schweißverbindungen (2005)
Für die schwingfeste Auslegung von geschweißten Bauteilen stehen neben dem konventionellen Nennspannungskonzept auch örtliche Nachweiskonzepte zur Verfügung, wie z. B. das Struktur-,...
Static and fatigue properties of high strength PM-steels (2005)
Sigl, L.S., Delarbre, P., Lipp, K., Sonsino, C.M.
The static, dynamic and fatigue properties of two high-alloyed Fe-(Mo)-Ni-Cu PM steels are compared with two Fe-(Cr,Mo) PM steels. All materials were processed in a typical industrial environment....
Assessments of components under multiaxial service loading - calculations and experiments (2005)
Sonsino, C.M, Zenner, H., Yousefi-Hashtyani, F., Küppers, M.
This paper is focused on a research project supported by the German automotive industry and international software producers. Six multiaxially loaded components were tested under random multiaxial...
Zukunftsperspektiven für die Pulvermetallurgie durch die Betriebsfestigkeit (2005)
Das Festigkeitsverhalten unter komplexen Betriebsbelastungen mit variablen Amplituden ist mit dem bisher durch Wöhlerversuche erforschten Werkstofferhalten unter konstanten Amplituden nicht ohne...
Warmkompaktieren von Aluminiumpulvern - Mechanismen und Einfluss auf die Eigenschaften (2005)
Veltl, G., Petzold, F., Simchi, A., Sonsino, C.M, Lipp, K., Eksi, A.
In den hier vorgestellten Untersuchungen wurden die Einflüsse der Warmkompaktierung auf das Kompaktierungsverhalten von Aluminiumlegierungen ermittelt. Die Kompaktierung wurde mit Hilfe einer...
Local assessment concepts for the structural durability of complex loaded components (2005)
As fatigue damage is a local phenomenon, the design of components must put emphasis on local supportable stress/strain values. In critical areas of components, because of local stress/strain...
Verhalten von Stählen bei zyklischen Beanspruchungen (2004)
Das Betriebsfestigkeitsverhalten von Bauteilen wird primär von der Bauteilgeometrie, d.h. von Kerben, dominiert. Gegen Schlagbeanspruchung kann im Vergleich zu Bauteilen aus zähen...
Principles of variable amplitude fatigue design and testing (2004)
The proper consideration of variable amplitude loading by utilizing service spectra and appropriate Gassner-lines is essential for the design of light-weight components and structures by allowing...
Morgenstern, C., Sonsino, C.M., Kotowski, J., Dilger, K., Sorbo, F.
Im Hinblick auf eine Anwendung von Schweißverbindungen aus Aluminium im Personenwagen-, Nutzfahrzeug-, Anlagen und Waggonbau galt es, vorhandene Bemessungskonzepte für eine Lebensdauerabschätzung...
Sonsino, C.M., Hatscher, A., Hintersdorfer, J., Steinbeck, G., Kaufmann, H., Masendorf, R., ...
Within a joint project of the steel and automotive industry 17 steel sheet materials for automotive engineering in various delivery and forming conditions at temperatures of -40degreesC, 22degreesC...
Tensile and fatigue properties of cold and warm compacted Alumix 431 alloy (2004)
Eksi, A., Veltl, G., Petzoldt, F., Lipp, K., Sonsino, C.M
In this experimental study, tensile and fatigue properties of the Alumix 431 alloy (Al, Zn, Mg and Cu alloys) produced using the conventional press and sinter processes in different pressures and...
Sonsino, C.M., Lazzarin, P., Zambardi, R.
Full penetration butt weld joints between a tube and its flange are considered, subjected to pure bending, pure torsion and a combination of these loading modes. The model treats the weld toe like a...
Fatigue behavior of cast magnesium alloys under constant and variable amplitude loading (2004)
For a fatigue design with the cast magnesium alloys AZ 91 HP, AM 50 HP and jAM 20 HP strain and stress controlled fatigue data, influence of notches, main stresses, elevated temperatures and last but...
Aluminium die-casting is widely used in the automotive industry. Brackets, engine blocks, wheels and suspension arms etc. are typical applications. Due to the gases contained in the melt, more or...
Comparison of different methods for presenting variable amplitude loading fatigue results (2004)
This paper discusses eight methods for presenting fatigue test results for variable amplitude loading and their comparison with constant amplitude loading. While the maximum amplitude method compares...
Fatigue design of components subjected to cyclic loading requires special testing methods, component related material data and an appropriate safety concept. The following contribution presents a...
Betriebsfeste Auslegung hochbelasteter Kunststoffbauteile (2003)
Berg-Pollack, A., Gumnior, P., Sonsino, C.M., Hanselka, H.
Bauteile aus kurzfaserverstärkten Kunststoffen werden aus Gründen des Leichtbaus aber auch der Kostenersparnis immer mehr im Fahrzeugbau eingesetzt, z.B. als Komponenten von Saugsystemen. Diese...
Betriebsfestigkeit und Zuverlässigkeit von komplexen und intelligenten Strukturen (2003)
Structural durability of a product is achieved only by careful design, taking into account the different aspects of the required mission profile with regard to component strength. In order to include...
Sonsino, C.M., Hanselka, H., Kaufmann, H.
Die Untersuchungen wurden mit laserstrahlgeschweissten Hutprofilen aus Stahl und Aluminium unter konstanten und Gauß-verteilten variablen Torsionsamplituden durchgeführt. Die Blechdicke betrug bei...
Betriebsfestigkeit gefügter Bauteile (2003)
Wallmichrath, M., Sonsino, C.M., Bruder, T.
Eine gezielte Dimensionierung von gefügten Bauteilen des Fahrzeugbaus setzt sowohl die Kenntnis der mechanischen Betriebsbelastungen mit variablen Amplituden voraus, als auch die Berücksichtigung...
Filippini, M., Bernasconi, A., Foletti, S., Papadopoulos, I.V., Passerini, M., Sonsino, C.M.
A new low-cycle multiaxial fatigue criterion based on the concept of effective strain is proposed. The effective shear strain y(eff) is derived by averaging shear strains acting on all planes at a...
The multiaxial fatigue behaviour of materials with different ductility under constant and changing principal stress directions is also applicable to welded joints of different materials. For this,...
Multiaxial stress states in many welded constructions like chemical plants, railway carriages and frames of trucks. Those stresses can have constant and changing principal stress directions,...
Zyklisches Verformungsverhalten und Wöhlerlinien von Magnesiumlegierungen (2003)
Sonsino, C.M., Renner, F., Kotte, K.L.
An den Legierungen AZ91, AE42 (beide Druckguss), AZ31 und AZ80 (beide stranggepresst) wurden Untersuchungen zum zyklischen Werkstoffverhalten durchgeführt. Die Omega-Epsilon-Hysteresen der beiden...
Versuchszeitverkürzung in der Betriebsfestigkeit (2003)
Der zunehmende Kosten- und Zeitdruck im Entwicklungs- und Nachweisprozess von Bauteilen zwingt jedes Unternehmen, sich produktabhängig in zwei Bereichen stärker denn je zu vertiefen: - Verstärkte...
Schwingfeste Auslegung von dünnwandigen Laserstrahlschweissverbindungen für Einspritzsysteme (2003)
Schlemmer, J., Bacher-Höchst, M., Sonsino, C.M.
Die bisher vorhandenen Konzepte zur Berechnung von konventionellen Schweißnähten sind nicht auf dünnwandige Laserstrahlschweißverbindungen anwendbar. Hier wird ein Auslegungskonzept für...
Porosität und Schwingfestigkeit von Proben und Bauteilen aus Aluminiumdruckguss (2003)
Aluminiumdruckgussteile werden im Fahrzeugbau zur Erzielung eines Leichtbaus in großem Umfang eingesetzt. Für diese Teile fehlt bis heute immer noch eine zuverlässige Methode für die...
Werdin, S., Kotte, K.L., Sonsino, C.M., Zenner, H.
Das Ermüdungsverhalten von vier Magnesium-Gußlegierungen wurde experimentell in Einstufen- und Lastfolgeversuchen bei unterschiedlichen Umgebungsbedingungen untersucht. Auf der Grundlage dieser...
Sonsino, C.M., Zenner, H., Kotte, K.L.
Die mit den Legierungen AZ 91 HP, AM 50 HP, AM 20 HP und AE 42 HP durchgeführten Wöhler- und Gaßnerversuche ohne (R = -1) und mit Zugmittelspannungen (R = 0) zeigen bei gegebener...
Versuchszeitverkürzung in der Betriebsfestigkeit - Mehtoden und Kompromisse (2003)
Die Versuchszeit kann durch eine Erhöhung der Belastungsfrequenz und / oder der Belastung verkürzt werden. Hierbei müssen aber Effekte, wie die Unterdrückung von plastischen Verformungen,...
Fatigue assessment of laser welded overlap joints with local approaches (2002)
The fatigue strength of laser beam welded thin sheet specimens made of steel was examined in a project several years ago. The focus of the present numerical investigation are the overlap welded...
Betriebsfestigkeit in Germany - An overview (2002)
Sonsino, C.M., Berger, C., Kotte, K.L., Heuler, P., Naundorf, H., ...
Principles of variable amplitude fatigue design and testing (2002)
The assessment of service durability of components becomes more and more important in different technical areas like vehicle (automotive, railway), aeronautics, transportation, energy production,...
Küppers, M., Sonsino, C.M., Fischer, G., Störzel, K.
The assessment of multiaxial stress states is already a very difficult subject for constant amplitude loading. If the stresses occur additionally at random, the assessment procedure becomes even more...
Structural Durability and Reliability of Complex and Smart Structures: Paper 839 (2002)
Structural durability of a product is achieved only by careful design, taking into account the different aspects of the required mission profile with regard to componend strength. In order to include...
Lagoda, T., Sonsino, C.M., Kaufmann, H.
The paper presents the calculation of cumulative damage for two types of welded joints (butt weld and transverse stiffeners) of four steels (medium to high): S355N, S355M, S690Q and S960Q. This...
Die geringe Dichte von Magnesium verleiht Gusslegierungen mit diesem Element, insbesondere für die Fahrzeugindustrie, wegen der zu erwartenden Leichtgewichtsvorteile und der damit verbundenen...
Multiaxial fatigue of welded joints under constant and variable amplitude loadings (2001)
Flange-tube joints from fine grained steel StE 460 with unmachined welds were investigated under biaxial constant and variable amplitude loading (bending and torsion) in the range of 10(3) to 5 x...
Geschweißte Flansch-Rohr-Verbindungen aus dem Feinkornbaustahl StE 460 und aus der Aluminiumknetlegierung AlSi1MgMn T6 wurden unter kombinierter Biegung und Torsion untersucht. Bei den...
Multiaxial fatigue of welded structures - Problems and present solutions (2001)
The assessment of multiaxial fatigue in design codes for welded steel structures is based on the use of nominal- or- hot-spot stresses, or by conventional hypotheses like von Mises, Tresca, principal...
Filippini, M., Bernasconi, A., Foletti, S., Papadopoulos, I.V., Passerini, M., Sonsino, C.M.
A new low-cycle multiaxial fatigue criterion based on the concept of effective strain is proposed. The effective shear strain y(eff) is derived by averaging shear strains acting on all planes at a...
Fatigue Behaviour of Welded Aluminium under Multiaxial Loading (2001)
Multiaxial stress states occur in many welded constructions like chemical plants, railway carriages and frames of trucks. Those stresses can have constant and changing principal stress directions,...
Werkstoffauswahl für schlagartig und zyklisch belastete metallische Bauteile (2001)
The structural durability of components is dominated mainly by the geometry, i.e. notches. Compared with the impact resistance of forged components from ductile materials high impact values can be...
Fatigue crack initiation and growth in AlMg4.5Mn butt weldments (2001)
Sonsino, C.M., Brandt, U., Lawrence, F.
The fatigue life of full-penetration and partial-penetration 5 and 25 mm thickness AlMg4.5Mn (AA5083) aluminium alloy butt weldments was investigated under (R = 0 and R= -1) constant amplitude...
Welding and Fatigue of Aluminum for Commercial Vehicles (2000)
Sonsino, C.M., Kessel, M., Dilthey, U., Wohlfahrt, H., Gebur, J., Krüger, U., ...
Verfahren und Einrichtung zur Belastungspruefung von Ventilen (2000)
DE 19836963 A UPAB: 20000419 NOVELTY - The method involves applying a cyclic revolving bending load to the valve stem (1), which corresponds to a multiple of the bending loads of the valve stem that...
Werner, S., Sonsino, C.M., Bacher-Höchst, M.
Bei der betriebsfesten Auslegung von Bauteilen mit Hilfe der Schadensakkumulation spielt die Schadenssumme D eine große Rolle. Wird für die Schadenssumme der theoretische Wert D=1 angenommen, liegt...
Methods of structural durability assessment (2000)
Stuctural durability of a product is achieved only ba careful design, taking into account the different aspects of the required mission profile with regard to component strength. In order to include...
Werner, S., Bacher-Hoechst, M., Sonsino, C.M.
Using the concept of damage accumulation for the fatigue design of components under operational conditions, the correct damage sum is an important quantity. Assuming the tehoretical quantity D=1, the...
Spannungskonzentration und Schadensakkumulation bei mehrachsig belasteten Schweißverbindungen (1999)
Mit geschweißten, spannungsarmgeglühten Flansch-Rohr-Verbindungen aus StE 460 wurden unter kombinierter Biegung und Torsion Versuche mit Gauß'scher Zufallsbelastung vorgenommen. Für die...
Fatigue design data for welded stainless steels (1999)
Maddox, S.J., Branco, C., Sonsino, C.M., Manteghi, S., Küppers, M., Infante, V.
Rolling contact fatigue properties of selected PM-materials for gear-box applications (1999)
Rolling contact fatigue tests with a sliding of - 24 per cent were performed with the mixed alloys Fe+1.5 per cent Cu, carbonitrided, Fe+1.5 per cent Cu + 0.5 per cent C, as-sintered as well as...
Rolling contact fatigue. Component design and testing for P/M applications (1999)
Hoffmann, G., Sonsino, C.M., Michaelis, K.
Newly developed sintered steels, combined with new densification processes, make the P/M process a candidate for highly loaded gears or similar components. There is a great need to develop methods...
Sonsino, C.M., Bacher-Höchst, M.
The paper presents first how load spectra of antilock brake and electronic traction control systems (ABS/ETC) are obtained from braking pressure simulation in special test benches for particular...
Light turbocharger compressor wheels from aluminum and magnesium investment casting (1999)
Sonsino, C.M., Kaufmann, H., Keiper, R.
Within the scope of a team work between Kühnle, Kopp & Kausch AG (KKK), Volkswagen AG, Sterling International Technologies Ltd. and the Fraunhofer Institute for Strength of Structures under...
Sonsino, C.M., Brandt, U., Stoerzel, K.
A concept for the fatigue assessment of intake and exhaust valves from silicon nitride was developed. The concept includes the definition of operational stresses on the valves and the determination...
Werner, S., Sonsino, C.M., Radaj, D.
For the calculation of the fatigue strength of welded joints in aluminium the micro-support approach of Neuber was applied. Fatigue tests with unnotched and notched specimens of the base and weld...
Schwingfestigkeit induktionsgehärteter Bauteile aus AFP-Stählen (1999)
Cyclically loaded forged components bear high stress amplitudes which are obtained by the surface treatment '"induction hardening". To reach the optimum in fatigue strength the influence of the...
Palin-Luc, T., Kaufmann, H., Lasserre, S., Sonsino, C.M.
The transferability of fatigue data from specimens to components or from one component to an other is often very difficult due to two major phenomenons : the volumetric distribution of stresses...
The fatigue behaviour of 25 mm aluminium-alloy full and partial penetration butt welds were investigated. Strain controlled fatigue tests of the 5083 aluminium-alloy base and 5183 weld metal were...
Sonsino, C.M., Radaj, D., Brandt, U.
Three different local stress approaches, the stress averaging approach, the highly stressed volume approach and the crack propagation approach were applied to the fatigue assessment of welded joints...
Entwicklung von breiten und leichten Radialventilatoren mit geschweißten Hybrid-Laufschaufeln (1999)
Die Erzielung eines hohen Wirkungsgrades von 85 Prozent bei einer hohen Umfangsgeschwindigkeit von 130 m/s erfordert die Herstellung von Radialventilatoren leichter Bauweise. Hoher Wirkungsgrad...
Sonsino, C.M., Köppers, M., Perting, D., Kasimir, M.
Laser beam welding of aluminum sheets requires a particular adjustment of this technology to the material with regard to manufacturing parameters like speed, maximum allowable gap, welding with or...
Fatigue tests were performed and compared to the constituents of the microstructure on specimens in notched and unnotched conditions, manufactured from diffusion-alloyed (Distaloy AE) and prealloyed...
Sonsino, C. M., Tengzellus, J., Arnhold, V., Lipp, K., Waehling, R.
The tensile and fatigue properties of newly developed PM-alloys Fe-8.0%Ni-1.0%Mo-0.5%C and Fe-1.5%Mo-0.5%C were studied in this paper. The Fe-8Ni was sintered, while the Fe-1.5Mo material was...
The effect of porosity on the constant and variable-amplitude fatigue of Al-7Si-0.6Mg (age-hardened) and Al-11Si-Mg-Sr (non-age-hardened) alloys has been investigated. Results show that the endurance...
Lipp, K., Straffelini, G., Sonsino, C. M.
Unnotched and notched specimens with a density of 7.1 g/cm(3) and made of diffusion-alloyed Distaloy AB (Fe- 1.75Ni-1.5Cu-0.5Mo) powder admixed with 0.5% C and 0.5% MnS in the quenched and tempered...
The envirommental exposition of usual structural steels and weathering steels doesn't influence the fatigue strength in the welded state, but the fatigue strength of the unwelded material by a...
The fatigue behaviour of 5 and 25 mm 5083 aluminium-alloy weldments (1998)
Brandt, U., Lawrence, F.V., Sonsino, C.M.
The fatigue behaviour of 5 mm and 25 mm aluminium-alloy butt weldments with full and incomplete penetration was investigated. Strain controlled fatigue tests of the 5083 aluminiu malloy base and 5183...
Fatigue assessment of welded joints in AlMg4.5Mn aluminium alloy by local approaches (1998)
Sonsino, C.M., Radaj, U., Brandt, U., Lehrke, H.P.
The industrially used fatigue strength assessment concepts basing on nominal and/or structural stresses cannot consider and describe in detail the local stress-strain state in the root of a weld. To...
Sonsino, C.M., Zieschang, R., Hofmann, B., Molinari, A., Sandritter, K.H., Persson, M.
The use of the casting technology, especially the application of the lost wax method, would be too expensive and time consuming for manufacturing of models and moulds for a small number of corrosion...
The research work established for the stainless steels x 2 Cr 11 (1.4003), x 2 CrNiN 18 7 (14318) and x 5 CrNiMo 152 (1.4589) for unwelded and welded states strain- and load controlled SN curves....
Lipp, K., Sonsino, C.M., Pohl, D., Hock, S.
The knowledge about the behaviour of sintered steels under Hertzian pressure is important for the selection of the appropriate material composition and densification technology. While the rolling...
Radaj, D., Sonsino, C.M., Flade, D.
The applicability of the notch strain approach to the assessment of the fatigue strength and service life of a K-shaped tubular joint is investigated. The structural stresses in the hot spot area are...
PM looks forward to pump impeller role (1998)
Sonsino, C.M., Zieschang, R., Arnhold, V., Hofmann, B., Gonia, D., Sandritter, K.H.
For the manufacture of small runs of corrosion and/or abrasion resistant pump impellers, powder metallurgy (PM) offers a potentially economic alternative to casting. A collaborative research project...
Methods of service durability assessment (1998)
Service durability of a product can be achieved only by careful design taking into account the different aspects of the required mission profile with regard to component strength. In order to include...
Materials technology drives impeller design (1998)
For the manufacture of small runs of corrosion and/or abrasion resistant pump impellers, powder metallurgy offers a potentially economic alternative to casting. A collaborative research project in...
The article discusses by the examples of a cast iron truck hub and cast aluminum gearbox-housing the design and experimental proof against complex service loading.
The article discusses by the examples of a cast iron truck hub and cast aluminum gearbox-housing the design and experimental proof against complex service loading.
Generally, areas of components with notches or geometrical transitions are critical because of the resulting stress/strain concentrations. In these areas due to the stress-gradients and constraint...
In a joint project of a German working group supported by the ECSC and tile Studiengesellschaft für Stahlanwendung e. V, the fatigue behavior of large-scale hybrid tubular joints with inserts...
Gießen '98. Der kurze Weg zum Erfolg (1998)
The report gives an overview on different casting related subjects presented in the conference.
The development of fatigue loaded PM parts requires knowledge of material related design data such as S-N curves, influence of loading mode, notches, and mean stress sensitivity on one hand, and on...
Fatigue design and testing of components (1998)
Optimum dimensioning of components presupposes a knowledge of the stresses encountered under representative operating conditions and also, the strength behaviour as a result of design, material and...
Fatigue design and testing of components (1998)
Optimum dimensioning of components presupposes a knowledge of the stresses encountered under representative operating conditions and also, the strength behaviour as a result of design, material and...
Fatigue behaviour of sintered materials and components under operational service (1998)
The development of fatigue loaded PM parts requires knowledge of material related design data such as S-N curves, influence of loading mode, notches, and mean stress sensitivity on one hand, and on...
Sonsino, C.M., Zieschang, R., Arnhold, V., Sandritter, H.H., Gonia, D.
For manufacturing of only a small number of corrosion and/or abrasion resistant pump impellers the application of the casting technology would be too expensive and time consuming. However, the PM...
A theoretical calculation of the S-N-curves based on crack propagation of geometrically similar specimens with and without incomplete joint penetration is presented. The results are compared with the...
The dimensions of a truck stuble axle were calculated according to the new FKM fatigue design regulations. While for constant amplitudeloading calculated and experimentally determined S-N curves were...
Transferability of material data for the example of a randomly loaded forged truck stub axle (1997)
For the development of new components, design engineers today have access to a broad amount of fatigue data, which were obtained from unnotched and notched specimens. These data can be transformed...
Generally, areas of components with notches or geometrical transitions are critical because of the resulting stress/strain concentrations. In these areas due to the stress-gradients and constraint...
Sonsino, C.M., Kaufmann, H., Foth, J., Jauch, F.
In a collaborative investigation of ZF Friedrichshafen AG and the Fraunhofer-Institut for Betriebsfestigkeit LBF, both constant and variable amplitude fatigue tests were performed on induction-...
Vorhersage der Betriebsfestigkeit eines geschweißten Rohrknotens auf Basis lokaler Konzepte (1997)
Radaj, D., Sonsino, C.M., Flade, D.
The applicability of the notch strain approach to the assessment of the fatigue strength and service life of a K-shaped tubular joint is investigated. The structural stresses in the hot spot area are...
Transferability of material data for the example of a randomly loaded forged truck stub axle (1997)
Sonsino, C.M., Kaufmann, H., Grubisic, V.
For the development of new components, design engineers today have access to a broad amount of fatigue data, which were obtained from unnotched and notched specimens. These data can be transformed...
Simultaneous Engineering am Beispiel der Entwicklung von gesinterten Fahrzeugpleueln (1997)
Sonsino, C.M., Hoffmann, E., Arnhold, V.
Sintered con-rods for automotive applications can be produced in the single sinterring technique very economically if principles of simultaneous engineering are followed. The paper presents the...
Schwingfestigkeit wetterfester Baustähle nach langjähriger Bewitterung (1997)
Ehl, J., Müller, F., Pircher, H., Schmidt-Zinges, J., Schriever, U., ...
In einer Gemeinschaftsarbeit zwischen vier deutschen Stahlunternehmen und dem Fraunhofer-Institut für Betriebsfestigkeit (LBF) in Darmstadt wurde an bis zu 20 Jahren an zwei Industriestandorten...
Overview of the state of the art on multiaxial fatigue of welds (1997)
Flange-tube joints from fine grained steel StE 460 with unmachined welds were investigated under biaxial constant and variable amplitude loading (bending and torsion) in the range of 10(exp 3) to 5 x...
Fontanari, V., Sonsino, C.M., Kaufmann, H.
Large mechanical components subjected to cyclic loading quite often spend a considerable part of their life in the propagation of one or more fatigue cracks. Therefore the knowledge of materials...
Bacher-Höchst, M., Sonsino, C.M.
The paper presents first hour load spectra of antiblock brake and electronic traction control systems (ABS/ETC) are obtained from braking pressure simulation in special test benches for particular...
Leichte Turbolader-Verdichterräder aus Aluminium- und Magnesium-Feinguss (1997)
Keiper, R., Sonsino, C.M., Kaufmann, H.
Within the scope of a team work between Kühnle, Kopp & Kausch AG, VW AG, Sterling International Technologies and the Fraunhofer Institute for Strength of Structures under Operational Conditions LBF...
Flexibles Laserstrahlschweißen von Aluminiumlegierungen für den innovativen Leichtbau (1997)
Ehrhardt, A., Frohn, W., Behler, K., Poprawe, R., Sonsino, C.M., Ritter, W., ...
The laser welding of a structural chassis beam and the adjustment of the welding device to this complex part was presented. Further examples demonstrate the potential of this flexible and powerful...
Sonsino, C.M., Kaufmann, H., Foth, J., Jauch, F.
In a collaborative investigation of ZF Friedrichshafen AG and the Fraunhofer-Institut für Betriebsfestigkeit LBF, both constant and variable amplitude fatigue tests were performed on...
The development of fatigue loaded PM parts requires knowledge of material related design data such as S-N curves, influence of loading mode, notches, and mean stress sensitivity on one hand, and on...
Charakterisierung von lasergeschweißten Verbindungen aus der Sicht der Betriebsfestigkeit (1997)
Sonsino, C.M., Kaufmann, H., Behler, K., Erhardt, A.
For qualifying of laserwelded connections on one hand metalurgical and on the other hand technological destructive and non-destructive test procedures are applied. The results of technological tests...
Flange-tube as well as tube-tube joints from fine grained steel StE 460 with unmachined welds were investigated under biaxial constant and variable amplitude loading (bending and torsion) in the...
Bemessung von Keramikventilen für eine Serienfertigung (1997)
Sonsino, C.M., Brandt, U., Störzel, K.
The substitution of metal valves by ceramic valves in automobiles promises: I. Reduction of valve weight by about 60 per cent. II. Improvement of driving efficiency of the valve. III. Reduction in...
Single-sintered PM connecting rods (1996)
Richter, K., Hoffmann, E., Lipp, K., Sonsino, C.M.
The single sintering technique with densities around 7.1 g/cm3 is able to cover the needs of 1.5 to 2.0 l engines up to 7,000 rpm and promises, fracture splitting of the big bore provided, a very...
Requirements for operational fatigue strength of high quality cast components (1996)
For the fatigue design of high quality cast components the information about service loading, geometry, material behaviour depending on alloy, casting technology, heat treatment and surface state...
Leichte Turbolader-Verdichterräder aus Aluminium- und Magnesium-Feinguss (1996)
Keiper, R., Sonsino, C.M., Kaufmann, H.
Within the scope of a team work between Kühnle, Kopp & Kausch AG, VW AG, Sterling International Technologies and the Fraunhofer Institute for Strength of Structures under Operational Conditions LBF...
Sonsino, C.M., Müller, F., De Back, J., Gresnigt, A.M.
Constant amplitude fatigue tests with welded specimens under fully reversed four-point bending as well as under axial loading have shown that vibration stress relieving does not lead to a fatigue...
The use of hybrid nodes combining high-strength steels with cast steel inserts of same quality meets the requirements of higher fatigue life and strength compared to conventionally welded nodes and...
How sintering time and temperature influence fatigue (1996)
Mechanical properties of the diffusion alloyed PM' steel Fe-4.0 percent Ni-1.5 percent Cu-0.5 percent Mo+0.6 percent (Ultrapac LE + 0.6 percent C) at the density of 7.1 g/cbcm sintered at 1120 degree...
Festigkeit von Schweißverbindungen unter kombinierter Beanpruchung (1996)
Welded crucifix-type specimens from fine grained steel StE 290 and flange-tube as well as tube-tube joints from fine grained steel StE 460 with unmachined and machined welds were investigated under...
Fatigue life of welded stainless steels (1996)
Sonsino, C.M., Müller, F., Hölscher, M., Krautschick, J., Schmitz, K., Uhlig, G., ...
The Investigation of the fatigue behaviour of four stainless steels in the unnotched, notched, coldformed, laser welded and spot welded material state showed, that the fatigue strength was strongly...
Fatigue design of high loaded PM parts. Part 2 (1996)
The development of advanced meterials and processes is enabling powder metallurgy (PM) to win more business in high load applications, particularly in the automotive industry. To succeed in this...
Fatigue design of high loaded PM parts. Part 1 (1996)
The development of advanced materials and processes is enabling powder metallurgy (PM) to win more business in high load applications, particularly in the automotive industry. To succeed in this...
Brandt, U., Sonsino, C.M., Engström, U., Ernst, E., Hoffmann, E.
Free nickel is avoided more and more in the development of new iron basis P/M alloys, either by complete elemination of free nickel or by using powders where nickel is already pre- or...
Müller, F., Engels, A., Weiss, B., Chen, D.L., Stickler, R., Sonsino, C.M.
The project had the aim to develop a new cast steel for offshore applications with an improved fatigue behaviour, when compared to other cast steels. This could be carried out successfully within a...
Betriebsfestigkeit von torsionsbelasteten Wellen für Automatgetriebe (1996)
Kaufmann, H., Sonsino, C.M., Foth, J., Jauch, F.
Discussion of divergent results of numerical life time predictions using several state-of-the-art procedures of torsionally loaded automatic drive shafts under operational loading, and proposal of an...
Christianus, D., Engels, A., Fischer, W., Freier, K., ...
Offshore structures have been built in steel or concrete. With steel, new design concepts are necessary as the water depths increase. The so called hybrid' design of tubular joints with cast steel...
Festigkeitsverhalten von einfachgesinterten Pleueln für Personenkraftwagen (1995)
The single sintering technique with densities around 7.1 g/qcm is able to cover the needs of 1.8 to 2.0 l engines up to 7.000 rpm and promises, fracture splitting of the big bore provided, a very...
Sonsino, C.M., Kaufmann, H., Grubisic, V.
In developing new components, design engineers nowadays have at their disposal a large body of fatigue data obtained from notched and unnotched specimens. These data are transferable to...
Schwingfestigkeit von hochfesten Feinkornbaustählen im brenngeschnittenen Zustand (1995)
Kaufmann, H., Sonsino, C.M., Schönherr, W.
In this research project the fatigue behavior of flame cut specimens of the high-strength fine grained structural steels StE 355, StE 460, StE 690 and StE 890 was investigated, taking into account...
Welded crucifix-type specimens from fine grained steel StE 290 and flange-tube as well as tube-tube joints from fine grained steel StE 460 with unmachined and machined welds were investigated under...
Constant and variable amplitude fatigue tests on unnotched specimens under strain controlled axial loading and on notched specimens under load controlled bending were carried out in order to...
Korrosionsschwingfestigkeit von punktgeschweißten, verzinkten Feinblechen des Fahrzeugbaus (1995)
The fatigue behaviour of spotwelded sheets from the steels RSt 14, St 14 ZE 25/25, St 14 ZE 75/75, St 06 Z 140 and St 06 ZF 140 was investigated. Tests with these connections under constant and...
Hochwertige Gußbauteile - Forderungen zur Betriebsfestigkeit (1995)
For the fatigue design of high quality cast components the information about service loading, geometry, material behaviour in dependency of alloy, casting technology, heat treatment and surface state...
Hochwertige Gußbauteile - Forderungen zur Betriebsfestigkeit (1995)
For the fatigue design of high quality cast components the information about service loading, geometry, material behaviour in dependency of alloy, casting technology, heat treatment and surface state...
Fatigue behaviour of aluminium castings. Effect of porosity on design (1995)
In aluminium castings the degree of porosity influences the fatigue strength in different ways, depending on heat-treatment and stress concentration. Even in safety parts porosity can be tolerated....
Günther, H., Brandt, U., Sonsino, C.M.
Introduction and approach. Experimental studies: materials and specimens; test carried out; results. Theoretical basis: material equation; evolution equation; computational implementation of the...
Generally, areas of components with notches or geometrical transitions are critical because of the resulting stress/strain concentrations. In these areas due to the stress-gradients and constraint...
Sonsino, C.M., Lipp, K., Lachmann, E.
Structures of offshore platforms are generally subjected to high loads. These structures are mainly fabricated from steel with welded complex tubular steel nodes where fatigue cracking occurs in the...
Betriebsfestigkeit von torsionsbelasteten Wellen für Automatgetriebe (1995)
Foth, J., Jauch, F., Sonsino, C.M., Kaufmann, H.
In a common investigation of ZF Friedrichshafen AG and Fraunhofer-Institut for Strength of Structures under Operational Conditions LBF constant as well as variable amplitude fatigue tests on...
Betriebsfeste Bemessung von Stahlkonstruktionen im Anlagenbau (1995)
The knowledge of operational loading, shape, material and manufacturing of components for plants is necessary for their design. While loads and geometry determine the overall an local stresses, the...
Mechanical properties of the diffusion alloyed PM' steel Fe-4.0%Ni-1.5%Cu-0.5%Mo+0.6%C (Ultrapac LE +0.6%C) with the density of 7.1g/ccm sintered at 1120 dereegs Centigrade/30 min, 1120 degrees...
Lipp, K., Sonsino, C.M., Lachmann, E.
By welding of cast steel intersections between rolled structural steels the welds can be removed to areas of low stresses and so the fatigue life of the structure can be improved significantly....
Fatigue design for PM components. Manual for design and production engineers. (1994)
The book, intended for extensive use by engineers who design and develop new precision components, pays particular attention to the design of components which have to withstand variable loading...
The fatigue behaviour of welded joints depends primarely on the interaction between notch geometry, residual stress and type of loading, i.e. constant and variable amplitude loading. Longitudinal...
Single-sintered con rods - an illusion? (1994)
Richter, K., Hoffmann, E., Lipp, K., Sonsino, C.M.
The single sintering technique with densities around 7.1 g/ccm is able to cover the needs of 1.5 to 2.0 l engines up to 7.000 rpm and promises, fracture splitting of the big bore provided, a very...
Single-sintered con rods - an illusion? (1994)
Richter, K., Hoffmann, E., Lipp, K., Sonsino, C.M.
The single sintering technique with densities around 7.1 g/ccm is able to cover the needs of 1.5 to 2.0 l engines up to 7.000 rpm and promises, fracture splitting of the big bore provided, a very...
Schwingfestigkeit lasergeschweißter Verbindungen. (1994)
Hitherto only a small amount of fatigue data for laser welded steel plates are available. For that reason the fatigue behaviour of several basic types of laser weldments was determined under constant...
Rolling contact fatigue of sintered steels under Hertzian pressure and sliding (1994)
Lipp, K., Sonsino, C.M., Pohl, D., Brandt, W.
In most investigations the rolling contact fatigue properties of sintered steels are determined without superposition of an additional sliding which is present on the flanks of gears during...
How sintering time and temperature influence fatigue (1994)
Mechanical properties of the diffusion alloyed PM' steel Fe-4.0 percent Ni-1.5 percent Cu-0.5 percent Mo+0.6 percent (Ultrapac LE + 0.6 percent C) at the density of 7.1 g/cbcm sintered at 1120 degree...
How sintering time and temperature influence fatigue (1994)
Mechanical properties of the diffusion alloyed PM' steel Fe-4.0 percent Ni-1.5 percent Cu-0.5 percent Mo+0.6 percent (Ultrapac LE + 0.6 percent C) at the density of 7.1 g/cbcm sintered at 1120 degree...
Welded crucifix-type specimens from fine grained steel StE 290 and flange-tube as well as tube-tube joints from fine grained steel StE 460 with unmachined and machined welds were investigated under...
Fatigue of welded joints under multiaxial in- and out-of-phase local strains and stresses (1994)
The fact that conventional hypotheses are inadequate for evaluating welded joints subject to multiaxial outof-Phase stress/strain states with changing principal stress/strain directions made it...
Fatigue design criteria for ceramic components under cyclic loading (1994)
Buxbaum, O., Sonsino, C.M., Esper, F.J.
The fatigue behaviour of differently manufactured Al2O3 ceramics and random samples of Si3N4 ceramics was investigated. The tests were carried out under different mean stresses at room temperature,...
Ertragbare Strukturspannungen von lasergeschweißten Stahlblechen (1994)
Sonsino, C.M., Müller, F., Radaj, D.
In this research project the fatigue performance of some basic types of laser welded joints with a plate thickness of 0.8 mm and 2.0 mm was determined under constant amplitude axial fatigue loading....
Einfluß von Härtungsparametern auf die Schwingfestigkeit von Gesenkschmiedeteilen (1994)
Kaufmann, H., Ziemann, M., Klemz, R., Sonsino, C.M.
From previous research projects it was known that the best increase in fatigue strength against vibratory stress out of all conventional surface retreatment methods could be achieved for die forged...
Mechanical properties of the diffusion alloyed PM' steel Fe-4.0 percent Ni-1.5 percent Cu-0.5 percent Mo plus 0.6 percent C (Ultrapac LE plus 0.6 percent C) with the density of 7.1 g/cbcm sintered at...
Sonsino, C.M., Kaufmann, H., Müller, F., Berghöfer, U.
In this research project the fatigue behaviour of flame cut specimens of the high-strength fine grained structural steels StE 355, StE 460, StE 690 and StE 890 was investigated, taking into account...
Back, J. De, Gresnigt, A.M., Müller, F., Sonsino, C.M.
The most common method for relieving residual stresses is post weld heat treatment (PWHT). PWHT is used in cases where machining of welded components and castings with high residual stresses may...
This paper reports on the influence of porosity on constant- and variable-amplitude fatigue of an age-hardened alloy G-Al-7Si-0.6Mg wa and a non-age-hardened alloy G-Al-11Si-Mg-Sr. Both alloys reveal...
Lipp, K., Straffelini, G., Sonsino, C.M.
Unnotched and notched specimens with a density of 7.1 g/cbcm and made of diffusion-alloyed Distaloy AB(Fe-1.75Ni-1.5Cu-0.5Mo) powder admixed with 0.5 percent C and 0.5 percent MnS in the quenched and...
Fatigue design criteria for ceramic components under cyclic loading (1993)
The investigations carried out and the results presented show clearly that for a fatigue design against cyclic loading the knowledge of conventional properties like tensile or compressive static...
Sonsino, C.M., Meyer, S., Lindemann, G.
The investigations carried out and the results presented show clearly that for a fatigue design against cyclic loading the knowledge of conventional properties like tensile or compressive static...
In a joint project of a German working group supported by the ECSC large scale tubular joints welded from fine grained steels StE 355 and StE 690 and hybrid tubulars with cast steel inserts from GS-8...
Comportamento a fatica di acciai sinterizzati trattati termicamente. (1993)
Straffelini, G., Lipp, K., Waehling, R., Tengzelius, J., Sonsino, C.M.
To develop a material with high fatigue strength and acceptable machinability, unnotched and notched (Ksubt=1.0 and Ksubt=2.8) samples in the density 7.1 g/cbm made a Distaloy AB...
For an accurate estimation of the fatigue of crack initiation the knowledge of the maximum local equivalent strain or stress in the critical area of a component for a given state of material,...
Betriebsfestigkeitsnachweis von Aluminiumguß-Getriebsgehäusen für schienengebundene Fahrzeuge (1993)
Sonsino, C.M., Lipp, K., Wiebelhaus, W., Piepenbreier, E.
Cast aluminium gear box casings for railway vehicles are complex shaped components undergoing stochastic stresses during service. Early failures of casings led to broad investigations in order to...
Schwingfestigkeit von Al2O3- und Si3N4-Keramiken (1992)
Within this research work the fatigue behaviour of differently manufactured Alsub2Osub3ceramics and random samples of Sisub3Nsub4-ceramics were investigated. The tests were carried out under room...
Müller, F., Sonsino, C.M., Muesgen, B.
In this research work the fatigue behaviour of welded V-shaped specimens made of the steels FeE 355 KT and Fe E 690 V with two types of post weld treatment (TIG-dressing of the weld toe, shot peening...
The fatigue behaviour of welded joints depends primarely on the interaction between notch geometry, residual stress and type of loading, i.e. constant and variable amplitude loading. Longitudinal...
Schwingfestigkeit von Verschraubungen aus Sinterwerkstoffen. (1992)
For the design of screwed components, data on static pull-out and fatigue behaviour are necessary. The appropriate data and manufacturing methods for different PM-steels and PM-aluminium were...
Schwingfeste Bauteilbemessung mit höherfesten Stählen. Tl.2. Schwingfestigkeitskennwerte (1992)
Hanewinckel, D., Sonsino, C.M.
The necessary properties for the fatigue design of components from high-strength steels for constant amplitude loading are extended to cover also fatigue strength under variable amplitude loading for...
Hanewinckel, D., Sonsino, C.M.
The paper demonstrates that the fatigue strength of the high-strength steels investigated depends in the first line on their tensile strength and not on the microstructure, that at increasing stress...
Mechanical properties of newly developed PM-alloys (1992)
Sonsino, C.M., Tengzelius, J., Arnhold, V., Lipp, K., Wähling, R., Hoffmann, E.
Heavy duty applications of the automotive industry are forcing the PM' industry more and more to develop new high-strength materials. Herefore, two newly developed materials Fe8.0%Ni-1.O%Mo-0.5%C, as...
Fatigue tests were performed and compared to the constituents of the microstructure on specimens in notched and unnotched conditions, manufactured from diffusion-alloyed (Distaloy AE) and prealloyed...
The improvement of fatigue behaviour of sintered steels by surface rolling (1992)
Müller, F., Müller, R., Sonsino, C.M.
In this investigation fatigue-life curves of two low- and high-strength powder metallurgy steels Fe-1.5Cu (rho is equal to 7.15 g cmhighminus3) and Fe-8.0Ni- 1.0Mo-0.5C (rho is equal to 7.35 g...
Fatigue behaviour of screwed sintered materials with different strength and heat treatment (1992)
For the design of screwed components, information about static pull-out and fatigue behaviour are required. The appropriate data and manufacturing methods for various PM-steels and PM-aluminium...
Bergmann, J., Brandt, U., Sonsino, C.M.
Cast nickel base alloys are used for integral turbine wheels of turbochargers and small gas turbine engines. Fatigue tests on unnotched specimens under constant strain amplitude loading were carried...
Einflußgrößen der Betriebsfestigkeit geschmiedeter Bauteile (1992)
For dimensioning purposes of components it is necessary to consider the relevant strength data, the properties of the material and the influence of the manufacturing process as well as the shape of...
Einflußgrößen der Betriebsfestigkeit geschmiedeter Bauteile (1992)
For dimensioning purposes of components it is necessary to consider the relevant strength data, the properties of the material and the influence of the manufacturing process as well as the shape of...
Einfluß von Härtungsparametern auf die Schwingfestigkeit von Gesenkschmiedeteilen (1992)
Kaufmann, H., Sonsino, C.M., Wetter, E.
From previous research projects it was known that the best increase in fatigue strength against vibratory stress out of all conventional surface retreatment methods could be achieved for die forged...
Das Bruchverhalten von Fahrwerkskomponenten. Tl.2. Einfluß der Konstruktion (1992)
Fischer, G., Grubisic, V., Sonsino, C.M.
When designing high-performance, light-weight components for car transmission and suspension systems, it is important to know the component life-time under normal, random load as well as the safety...
Das Bruchverhalten von Fahrwerkskomponenten. Tl.1. Werkstoffeinfluß (1992)
Fischer, G., Grubisic, V., Sonsino, C.M.
When designing high-performance, light-weight components for car transmission and suspension systems, it is important to know the component life-time under normal, random load as well as the safety...
The fatigue behaviour under constant amplitude loading of several charges of the structural steel St 52-3 and the weathering steel WT St 52-3 was examined in the unwelded state (unnotched flat bar)...
The elemination or reduction of tensile residual stresses in welded components is mainly carried out by thermal treatment. This technique is well known and generally leads to a better fatigue...
The influence of cast defects on the fatigue behaviour is ascertained taking blades made of G- AlSi 10 Mg wa in the sand cast process. An improvement of fatigue strength is not only achievable by...
Considering vehicle constructions (road or rail) in particular the adequate evaluation of fatigue-related influences of material porosity caused by casting procedures is of major importance with...
On specimens made of squeeze-cast piston alloy GP-AlSi 12 CuMgNi without reinforcement and Al sub2 O sub3-fibre-reinforced, thermal fatigue was investigated. Several mechanical properties such as...
Present level of knowledge on fatigue strength of sintered steels (1991)
In general, the development of fatigue loaded PM' parts requires the knowledge of material-related design data like S-N curves, influence of loading mode, notches, mean stress sensitivity on one...
PM steels for heavy duty automotive components. (1991)
This paper presents for different PM'steels design relevant material data like S-N curves, effect of notches and mean stresses and fracture mechanical properties. The influence of different...
Most of welded joints incorporated into components under fatigue loading are subject to multiaxial stress/strain conditions with constant or variable orientation of the principal stresses. For the...
Christianus, D., Umbach, R., Sonsino, C.M.
The fatigue testing of welded tubular nodes and cast steel hybrid nodes under random loading and corrosion in artificial seawater shows clearly that the fatigue strength of the cast steel hybrid...
Fatigue life prediction for large size components (1991)
Am Beispiel eines Hochdruckbehälters und eines Rohrknotens wird einerseits anhand von material- und fertigungsgebundenen Kennwerten eine Lebensdauerabschätzung durchgeführt und andererseits anhand...
The results of single stage and service strength tests have been published already for cut specimens made of rolled stock and components made of steel. The integration of special parameters...
In this paper the results of constant amplitude axial and bending tests on notched and unnotched flat specimens are presented and discussed. The investigation comprises three types of sintered steel...
The results of single stage and service strength tests have been published already for cut specimens made of rolled stock and components made of steel. The integration of special parameters...
Investigation of fatigue characteristics of the precipitation-hardened aluminium alloys G-AlSi7Mg0.6 wa and G-AlCu4Ti wa as well as of the non precipitation-hardened aluminium alloys G-AlSi11MgSr,...
Schwingfestigkeit wetterfester Baustähle (1990)
The fatigue behaviour under constant amplitude loading of several charges of the structural steel St 52-3 and the weathering steel WT St 52-3 was examined in the unwelded state (unnotched flat bar)...
For the design of screwed components, data on static pull-out and fatigue behaviour are necessary. The appropriate data and manufacturing methods for different PM-steels and PM-aluminium were...
Korrosionsschwingfestigkeit der Stahlgussorten G-X 5 CrNi 13 4 und G-X 5 CrNi 17 4 (1990)
Das Forschungsvorhaben zielte darauf ab, den Einfluß unterschiedlicher Korrosionsparameter auf die Korrosionsschwingfestigkeit von mit 13 bzw. 17% Chrom legierten Stahlgußwerkstoffen für...
Fatigue design of sintered con-rods (1990)
Within an international research program con-rods from the alloy Fe-1.5-Cu-0.6C, quenched and tempered, with densities mostly over 7.0 g/ccm in the highly stressed areas were developed and pressed in...
Einfluß der Porosität auf das Schwingfestigkeitsverhalten von Aluminium-Gußwerkstoffen (1990)
In this work the age hardened alloys G-AlSi 7 Mg 0.6 wa, G-AlCu 4 Ti wa as well as the untreated G-AlSi 11 MgSr, G-AlSi 11 Mg and G-AlSi 11 Sr had been investigated. The results indicate that in...
Standardized load sequence for offshore-structures - WASH 1 (1990)
Hück, M., Klätschke, H., Schütz, W., Sonsino, C.M.
WASH 1 is composed of a defined series of six seastates for a yearly return period; the two lowest seastates 1 and 2 being eliminated, because they do not influence the fatigue life of offshore...
Engels, A., Kaufmann, H., Sonsino, C.M.
Determination of fatigue strength of different cast irons such as malleable cast iron GTS-35, GTS-70, GTW-S38 and spheroidal graphite cast iron GGG-40, GGG-70 and GGG-100 under operational stresses...
Multiaxial fatigue failures of welded coupling flanges of stirrers in a fertilizer plant required an investigation of the reasons for the failures and the development of an improved design. Strain...
In this project the influence of different corrosive media on the fatigue behaviour of stainless cast steel alloys with 13 and 17% chromium content for hydraulic machines was investigated in the high...
Tengzelius, J., Schlieper, G., Sonsino, C.M.
In this investigation fatigue-life curves of two low- and high-strength PM-steels Fe-1.5%Cu (Phi = 7.15 g/ccm) and Fe-8.0%Ni-1.0%Mo-0.5%C (Phi = 7.35 g/ccm) are compared for three different notch...
Fatigue design of sintered connecting rods (1990)
The design and testing of a PM automobile connecting rod are described. Finite element analysis is used to design a con-rod using engine data and materials properties. First prototypes were machined...
Fatigue design for powder metallurgy (1990)
This paper presents design relevant material data like S-N curves, effect of notches and mean stresses and fracture mechanical properties. The influence of different manufacturing parameters on the...
Fatigue design for powder metallurgy (1990)
This paper presents design relevant material data like S-N curves, effect of notches and mean stresses and fracture mechanical properties. The influence of different manufacturing parameters on the...
Fatigue design for powder metallurgy (1990)
This paper presents design relevant material data like S-N curves, effect of notches and mean stresses and fracture mechanical properties. The influence of different manufacturing parameters on the...
This investigation compares the fatigue behaviour of the alloys Fe-1.5%Cu, Fe-1.5%Cu-0.6%C and Fe-0.8%Mn-0.95%Cr-0.24Mo-0.6%C in as-sintered and heat treated states. The steel Fe-1.5%Cu is...
Entwicklung von Pkw-Pleueln aus Sinterstahl (1990)
For some time past it is known that the fatigue behaviour of sintered steel above a certain threshold density is comparable to that of forged steel or spheroidal graphite cast iron resp. Hence, the...
In this paper the results of constant amplitude axial and bending tests on notched and unnotched flat specimens are presented and discussed. The investigation comprises three types of sintered steel...
Development of sintered con-rods for automotive engines (1990)
Richter, K., Lawcock, R., Whittaker, D., Schlieper, G., Tengzelius, J., Lipp, K., ...
Within an international research program con-rods from the alloy Fe-1.5-Cu-0.6C, quenched and tempered, with densities mostly over 7.0 g/ccm in the highly stressed areas were developed and pressed in...
Betriebsfeste Bemessung von Bauteilen aus Sinterstahl und ihre Sicherheit. Tl.2 (1990)
The design of fatigue loaded parts requires on the one hand the knowledge about material related data, like fatigue life curves for constant and variable amplitude loading in dependence on notch...
Betriebsfeste Bemessung von Bauteilen aus Sinterstahl und ihre Sicherheit. Tl.1 (1990)
The design of fatigue loaded parts requires on the one hand the knowledge about material related data, like fatigue life curves for constant and variable amplitude loading in dependence on notch...
In this project the influence of different corrosive media on the fatigue behaviour of stainless cast steel alloys with 13 and 17% chromium content for hydraulic machines was investigated in the high...
In order to extend the already available knowledge on monotonic and cyclic stressstrain behaviour, fracture mechanical and fatigue properties of mostly used sintered alloys Fe-1.5%Cu,...
Der Schwerpunkt des Vorhabens lag in der Ermittlung des Schwingfestigkeitsverhaltens von aus verzinkten Blechen geschweißten und entsprechend im Nahtbereich durch thermisches Zinkspritzen...
Bei Bauteilen aus Gußwerkstoffen, die neben bearbeiteten auch unbearbeitete, leicht gekerbte Schwachstellen aufweisen, kann durch Kugelstrahlen der gußroh belassenen Kerben die Schwingfestigkeit...
Multiaxial fatigue failures of welded coupling flanges of stirrers in a fertilizer plant required an investigation of the reasons for the failures and to develop an improved design. Strain...
This paper discusses the fatigue behaviour of sintered steels under multiaxial loading. These steels are the Fe-1.5% Cu and the Fe-2.0% Cu-2.5% Ni, sintered at low and high temperatures, in the...
Mean stress and notch effect in HCF experiments on alloy 617 between 600 and 950 degree C (1989)
The heat exchanger tubing in a high temperature gas cooled reactor is subjected both to static loading and to a high frequency loading; superimposed on this. High cycle fatigue experiments at various...
Limitations in the use of RMS-values and equivalent stresses in variable amplitude loading (1989)
The use of RMS in random load (stress) analysis and generation requires special caution. However, the application of RMS or equivalent stress values to fatigue-life curves obtained under variable...
Gestaltung von geschmiedeten Fahrzeugbauteilen. Gewichtsoptimierung und Bruchverhalten (1989)
Fischer, G., Grubisic, V., Sonsino, C.M.
Über die maßgebenden Kriterien, die bei der Gewichtsoptimierung von Bedeutung sind, wird berichtet und die Einflußgrößen werden erörtert. Der untersuchte, in Serie gefertigte Vorderachsschenkel...
Betriebsfeste Bemessung von Bauteilen aus Sinterstahl und ihre Sicherheit (1989)
The design of fatigue loaded parts requires on the one hand the knowledge about material related data, like fatigue life curves for constant and variable amplitude loading in dependence on notch...
Standardized load sequence for offshore structures: Wave action standard history - WASH 1- (1988)
Sonsino, C.M., Klätschke, H., Schuetz, W., Hueck, M.
Auf der Basis von Dehnungsmessungen im Betrieb wurde in internationaler Zusammenarbeit ein Beanspruchungsablauf standardisiert, der für die Belastung von steifen Offshore-Einrichtungen typisch ist....
Kulka, C., Huth, H., Sonsino, C.M.
Am Beispiel der Vergütungsstähle 30 CrNiMo 8, 50 CrV 4, 41 CrS 4, 60 SiCr 7, der ferritisch-perlitischen Stähle 49 Mn VS 3, 42 CiMn VS 3 mit den Zugfestigkeiten 770 bis 940 MPa und den...
Sonsino, C.M., Arnhold, V., Schlieper, G., Müller, F.
The present paper describes the influence of shot peening on fatigue properties of the alloys Fe-1.5%Cu and Fe-2.0%Cu-2.5%Ni in the density of 7.4 g/ccm and compares this mechanical surface treatment...
Mit diesem Vorhaben wurde das Betriebsfestigkeitsverhalten von geschweißten Rohrknoten aus dem Feinkornbaustahl St E 355 und die Schwingfestigkeit durch Kugelstrahlen bzw. Wig-Nachbehandlung...
Fatigue design of sintered connecting rods (1988)
Within a European research programme on powder metallurgy (COST 503) an international collaboration between British, Swedish and German partners was established in order to design connecting rods for...
Bei einer Bemessung von örtlich elasto-plastisch beanspruchten Bauteilen für eine kleine Anzahl von Schwingspielen (N
This paper discusses the fatigue behaviour of sintered steels under multiaxial loading. These steels are the Fe-1.5%Cu and the Fe-2.0%Cu-2.5%Ni, sintered at low and high temperatures, in the...
To investigate the cumulative multiaxial fatigue behaviour of cyclically softening and hardening steels 30 Cr Ni Mo 8 (similar to AISI 4340) and X 10 Cr Ni Ti 18 9 (AISI 321) strain controlled tests...
Lachmann, E., Schütz, W., Sonsino, C.M.
Investigations on V-shaped welded joints of normal and high strength steels and of cast V-shaped specimens were conducted in seawater under spectrum loading (simulated sea state sequence of the North...
Bei einem Verformungsaufnehmer fuer zusammengesetzte Dehnungs- und Schub-Beanspruchung unter hohen Temperaturen, bei dem zwei je eine endseitige Aufnehmerstelle tragende Messbalken mit...
Bei der Suche nach einem Optimum zwischen einer hochwertigen technischen Loesung und moeglichst niedrigen Produktionskosten ruecken die Sinterwerkstoffe, insbesondere der Sinterstahl, immer mehr in...
Bei einer zutreffenden Bemessung von oertlich elasto-plastisch beanspruchten Bauteilen fuer eine kleine Anzahl von Lastspielen muessen Eigenschaftsaenderungen des Werkstoffes infolge von...
Ermittlung anwendungsrelevanter Kenngroessen fuer Sintermetalle (1981)
Die durchgefuehrten Bruchmechanik und Schwingfestigkeitsuntersuchungen mit den poroesen Fe-Cu-Cund Fe-Cu-Ni-Sinterlegierungen in drei bzw. vier Dichtevarianten zeigen, dass herkoemmliche Kenngroessen...
Eine ausfallsichere und optimale Auslegung von Hochdruckbehaeltern fuer eine relativ kleine Anzahl von Lastspielen ist nur unter Beruecksichtigung der an kritischen Systempunkten vorliegenden...
Festigkeitsbeurteilung von Bauteilen aus Stahl im Bereich der Kurzzeitschwingfestigkeit (1977)
Viele Konstruktionen wie z.B. Hochdruckbehälter für isostatische Pressanlagen, Reaktordruchgefässe, Behälter und Rohrleitungen der chemischen und energetischen Anlagen usw., sind für eine...