Author(s)

R. Desmorat & J. Lemaitre

Abstract

Structural failure often follows the initiation of cracks occurring at corners, free edges or interfaces. Damage mechanics gives quantitative information about such cracking. But when used in a fully coupled manner (with elasticity and plasticity), it leads to costly computations. In order to obtain helpful results for a fast design, following a Finite Element elastic computation, we propose a quick determination of the crack initiation conditions. First, the Neuber method is extended through to the assumption of a proportional loading Then, from previous elasticity calculations and from the knowledge of the plasticity material parameters, the equivalent stress field is obtained It is used as a input into the damage evolution

Keywords