Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 47, Issue -, Pages 232-243Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2012.09.005
Keywords
Micro-plasticity; Casting defects; Self-heating tests; Cyclic loadings
Funding
- DCNS
- DGA/MRIS (Delegation Generale pour l'Armement/Office for Advanced Research and Innovation)
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The present paper proposes, a new model for high cycle fatigue of metallic cast materials (i.e., containing initial casting micro-flaws). This model is developed in a probabilistic two-scale framework taking into account the presence of a population of initial micro-flaws by an indirect approach. The proposed model not only accounts for the failure of samples under high cycle loadings, but also for the thermal effects during cycling in a unified theoretical framework. Thus, an ad hoc identification procedure, essentially based on self-heating tests under cyclic loadings, is proposed. The performance of the proposed model is estimated by comparing experimental and theoretical results in the case of classical fatigue tests on a cast copper aluminum alloy. The results are very promising. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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