Abstract
In this study, a two-layer model is developed for simulating the homogenized elastic-viscoplastic behavior of plate-fm structures. This model consists of plate and fm layers, which are individually ruled by macroscopic constitutive models. An anisotropic, compressible power-law equation that was derived in a recent study by the present authors is used to describe the homogenized viscoplastic behavior of fm layers. On the other hand, an isotropic, incompressible power-law equation is used as the macroscopic constitutive equation of plate layers. The two-layer model developed is applied to an ultra-fme plate-fm structure made of Hastelloy X at 900℃. It is thus shown that the two-layer model is more successful especially under combined loading than the corresponding one-layer model in which plates and fms are non-separately modeled.
