Multi-mechanism models for the description of ratchetting : effect of the scale transition rule and of the coupling between hardening variables

Kacem Sai (1) , Georges Cailletaud (2)

1 Ecole Nationale d'Ingénieurs de Sfax - LGPMM
2 CDM - Centre des Matériaux

This paper is concerned with two multi-mechanism based models for application to ratchetting effect. The 2M1C (2 Mechanisms and 1 Criterion) model and 2M2C (2 Mechanisms and Criteria) model, proposed by the authors in a previous article, are modified to incorporate (i) a corrective term in the computation of the local stresses; (ii) Burlet–Cailletaud's fading memory term in the kinematic hardening evolution rule. Experimental data from the literature are selected to assess the models capability. Numerical results are obtained using the proposed models for a series of uni-axial and multi-axial ratchetting tests performed at different stress ranges of an austenitic stainless steel.

Mots clés: Multi-mechanism modeling; Ratchetting behavior; Nonproportional loading; Additional hardening

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Kacem Sai, Georges Cailletaud. Multi-mechanism models for the description of ratchetting : effect of the scale transition rule and of the coupling between hardening variables. International Journal of Plasticity, 2007, 23, pp.1589-1617. ⟨10.1016/j.ijplas.2007.01.011⟩. ⟨hal-00158941⟩