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The local low cycle approach is an attractive way to model the fatigue behaviour of structural components fitted with stress risers and submitted to occasional peak stresses. The report summarizes the work carried out at Centre de Recherches Métallurgiques (CRM) in the field of press formable steel sheets with different strength levels and processed according to several metallurgical routes. New experimental procedures as well as original concepts are proposed to derive and define the cyclic properties according to the Manson-Coffin theories, on small specimens submitted to controlled reverse strains. Tests on large specimens simulating a part with a non-uniform stress distribution are also reported and illustrated by finite element computations. A computer program is presented which models the fatigue behaviour of components using the cyclic properties of the material, and a comparison is made between simulated and actual fatigue lives. A survey of the fatigue properties of different steel grades completed by a comprehensive metallographical analysis concludes the presentation.

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Authors: MONTFORT G, Centre de Recherches Métallurigues, Liège (BE);DEFOURNY J, Centre de Recherches Métallurigues, Liège (BE);LEROY V, Centre de Recherches Métallurigues, Liège (BE)
Bibliographic Reference: EUR 15512 EN (1995) 107pp., FS, ECU 13.50
Availability: Available from the (2)
ISBN: ISBN 92-827-5659-9
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