On the plastic anisotropy of an aluminium alloy and its influence on constrained multiaxial flow (original) (raw)

The plastic behaviour of a metallic material is usually described through a yield surface in stress space, the associated plastic flow rule and an isotropic hardening law. The modelling of plastic anisotropy is still a difficult task for macroscopic models and particularly for complex multiaxial paths. The use of crystal plasticity theories can help in this direction, but their use is restricted by computational limitations and the observation that they do not predict the flow stresses and the plastic flow simultaneously, as shown for instance in and . Since the pioneering work of Hill (1948), a tremendous effort has been made during the last two decades to improve the modelling of anisotropy in macroscopic models .