An original flow rule for strain-space multi-surface Saint-Venant plasticity model

Abstract

International audienceThe one-dimensional Saint-Venant model can reproduce the elastic-plastic uniaxial behavior of metallic materials. A three-dimensional extension of this model is proposed, to simulate the cyclic elastic-plastic multiaxial behavior for complex loading paths. A multi-surface model is obtained and an original flow rule, defined in the strain space, is considered. This model has been implemented in a commercial finite element code. The model response is investigated for different loadings and compared to experimental data from the literature. The model showed accurate response in the multiaxial case of tension-torsion experiments