均質化マクロ構成モデルを用いた織物複合材料の非連成弾-粘塑性マルチスケール構造解析

抄録

In this study, the development of an elastic-viscoplastic macroscopic constitutive model for woven composites and its implementation in the finite element analysis code LS-DYNA are conducted for structural analyses of woven composites. To this end, an elastic-viscoplastic macroscopic constitutive model which is able to express strong anisotropy of woven composites is introduced, and the material parameters in the model are determined based on the results of triple-scale homogenization analysis using mesoscopic and microscopic structures (unit cells). Then, the constitutive model is implemented in the LS-DYNA through a user defined material subroutine. The present method is then applied to a bending analysis of a cantilever beam made of quasi-isotropic plain-woven carbon fiber-reinforced plastic (CFRP) laminates with two types of laminate configurations. It is found that the present method can express strong anisotropy and inelastic behavior of woven composites. It is also shown that the present method can analyze their different behavior depending on the laminate configuration.