期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 35, 期 -, 页码 44-66出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2012.01.010
关键词
Constitutive behaviour; Elastic plastic; Cyclic loading; Cyclic softening; Fatigue
资金
- French Ministry of Transportation (Direction des Programmes de l'Aviation Civile)
- French Ministry of Defence (Delegation Generale a l'Armement)
Cyclic plasticity and viscoplasticity constitutive equations are revisited in the context of fatigue life analysis of components submitted to small strain amplitudes but high strain ratio. The model used is based on a series of back stresses, each of them containing a threshold in the dynamic recovery term. Capability to correctly reproduce the cyclic softening and the limited mean stress relaxation is particularly examined, with the help of analytical solutions for uniaxial conditions. Comparisons are made with available experimental data on a Titanium alloy and a Nickel base superalloy, both in terms of the stabilized mean stresses and for the corresponding fatigue life prediction. (C) 2012 Elsevier Ltd. All rights reserved.
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