New yield criteria for isotropic and textured metallic materials

摘要

In this paper a new isotropic criterion that describes well yielding of randomly oriented face-centered polycrystalline metallic materials is proposed. The extension of this criterion such as to describe orthotropy is developed using generalized invariants of the stress deviator. This new orthotropic criterion is general and applicable to three-dimensional stress states. The procedure for the identification of the material parameters is outlined. Illustration of the predictive capabilities of the new orthotropic is demonstrated through comparison between the model predictions and data on aluminum sheet samples. (C) 2018 Elsevier Ltd. All rights reserved.