多結晶金属のマルチスケール解析によるマクロ材料特性評価における有限要素の性能

抄録

We examine the finite element performance at micro scale for the evaluation of the macroscopic material behavior and strength with two-scale finite element analysis method incorporating the elastic-plasticdamage constitutive model for crystal grain. In the two-scale analysis, the intragranular deformations are non-homogeneous as a result of intergranular deformation even if the macroscopic deformation is simply homogeneous. Hence it is vital that the effect of finite element mesh discretizing each grain is examined in order to characterize the macroscopic material behavior. And then the two-scale analyses are conducted to assess the convergence of solutions with mesh refinement of each grain. Besides numerical simulations obtained with the F-bar element and the standard enhanced assumed strain element are compared against the standard displacement-based isoparametric element so as to assess the importance of finite element formulation on computational results.