Large strain behaviour of aluminium sheets subjected to in-plane simple shear

In this paper, we investigate the nonuniform and localized deformation of thin rolled aluminium sheets subjected to in-plane simple shear. A finite element analysis based on a rate-dependent crystal plasticity model has been developed to simulate the planar shear test and large strain behaviour. Each material point in the specimen is considered to be a polycrystalline aggregate consisting of a large number of FCC grains. The Taylor theory of crystal plasticity is assumed. This analysis accounts for initial textures, as well as texture evolution during large plastic deformations. The numerical analysis incorporates certain parallel computing features. Both plane stress and plane strain analyses have been carried out for the aluminium sheet alloy AA3004-H19, and the initiation and propagation of shear bands are investigated.