Modelling in Fatigue Remarks on Scales of Material Description: Application to High Cycle Fatigue
Fatigue failure is the final step of complex physical processes difficult to model: It begins with the appearance of slip bands in some grains which broaden progressively during the following cycles. These phenomena occur simultaneously with the development of localised damage. The processes result in the formation of intragranular microcracks at a stage determined by the imposed load level. After a certain number of cycles, a main crack initiates, then propagates and shields the other defects and, consequently leads to a the final rupture of the mechanical structure.
KeywordsFatigue Sponge Work Hardening Meso Mandel
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- Kitagawa H. and Takahashi S. (1976°, Applicability of Fracture Mechanics to very Small Cracks in the Early Stage, Proc. 2 nd Int. Conf. Mech. Behaviour of Materials (ICM2), Boston, Mass. 627–631.Google Scholar
- .Bui H.D., Dang Van K., Stolz C., (1982), Relations entre Grandeurs Microscopiques et Macroscopiques, C.R. Acad. Sci. Paris, tome 292, série II, 1155–1158.Google Scholar
- K. Dang Van, Introduction to Fatigue Analysis in Mechanical Design by the Multiscale Approach, C.I.S.M. Courses and Lectures N° 392 on “High Cycle Metal Fatigue, from Theory to Applications”, Ed. by K. Dang Van & I.V. Papadopoulos, Springer Wien New York 1999.Google Scholar