GeoFEMによる大規模並列弾塑性解析

（反復法ソルバーの材料非線形解析における収束性の評価）

抄録

GeoFEM is a parallel finite element analysis system intended for multi-physics/multi-scale problems of solid earth field phenomena. At this stage, the very large linear elastic problem has been successfully completed by parallel computation with GeoFEM. At the next stage, the large-scale nonlinear problem is a target of research for GeoFEM. This paper shows an evaluation of iterative solver for linear system generated in elastic-plastic analysis and a possibility of large-scale parallel elastic-plastic analysis. Bi-CGSTAB method is better than ICCG method in terms of convergence rate, but stability of Bi-CGSTAB method is no good. Large-scale parallel elastic-plastic analysis is performed showing the good convergence of ICCG method.