PREDICTION OF PLASTIC ANISOTROPY IN ALUMINUM SHEET USING FINITE-ELEMENT POLYCRYSTAL MODEL (FINITE-ELEMENT POLYCRYSTAL MODEL)

A finite-element polycrystal model is proposed to predict plastic beha viors of polycrystal metals. Each element in FEM is assumed to be a cr ystal of cubic shape having its proper orientation, and microscopic pl astic strains are assumed to be uniform within each crystal. For the d etermination of rate-independent slips, a new numerical scheme, the '' Successive Accumulation Method'', is proposed on the basis of Schmid's law. The numerical code of the present model is quite simple and can be applied to arbitrary loading paths. A stress-strain curve under sim ple tension is calculated for a non-work-hardening FCC metal and compa red with those of other theories.