Rev. Met. Paris
Volume 103, Number 1, January 2006Compte rendu des Journées Sidérurgiques Internationales 2005 de l'ATS
|Page(s)||37 - 42|
|Published online||22 February 2006|
Thermomechanical fatigue of stainless steels for automotive exhaust systems
Exhaust systems are submitted to ever more severe service conditions, high temperature thermomechanical fatigue in particular. A numerical method is proposed for the design and the lifetime prediction of stainless steel exhaust manifolds submitted to a thermal fatigue load that is deducted from motor bench tests. The method relies on behaviour and damage models and on finite element analysis design of stainless steel exhaust manifolds. A dedicated damage criterion is proposed on the basis of the peak temperature and plastic strain amplitude reached during a thermal cycle. A more general thermomechanical fatigue damage model is also discussed.
© La Revue de Métallurgie, 2006
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