増分形変分原理に基礎を置く弾塑性材料中の破壊経路予測シミュレーション手法の開発

抄録

First, for growing cracks in elastic-plastic materials, an incremental variational principle is developed to satisfy the boundary conditions near newly created crack surfaces. Then using this variational principle, the moving finite element method is formulated and developed, based on the Delaunay automatic triangulation. Furthermore, theoretical backgrounds on numerical prediction for fracture path of curving crack using T^* integral are explained. Using the automatic moving finite element method, fracture-path prediction simulation is carried out for elastic-plastic fracture under mixed-mode loading.