近似リーマン解法に基づく三次元動的接触境界アルゴリズム

概要

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Development and utility of a novel three-dimensional dynamic contact algorithm based on an approximate Riemann solver to define contact forces are discussed. According to the resulting solver a smooth force field which prevent Lagrangian grids from overlapping is obtained by numerical iterations. Though the proposed method evolves from a hydrocode slideline methodology in the 60's, it has not recourse to the master-slave treatment which may cause numerical instabilities when the element size of the slave (impactor) element is larger than the one of the master (target) element. The method is implemented in an general-purpose explicit Lagrangian program. Numerical results are presented for a series of test problems and are compared with theoretical solutions as well as with these obtained by the penalty method.
一般社団法人日本機械学会の論文
2000-09-25