SPH法による異種金属接合板の衝撃問題の解析

概要

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In this study, a method of analyzing the dynamic behavior of an elastic object composed of different materials is proposed for smoothed particle hydrodynamics, SPH. In this method, the acceleration of a particle is calculated using the proposed equation, the relaxation equation for momentum, but the stresses are obtained using normalized relaxation equations for stresses, which are not sensitive to the edge effect of SPH caused by the lack of particles around the free surface. This hybrid method makes it possible not only to treat elastic multiphase materials without division into the individual phases, but also to save on the effort of searching particles and setting boundary conditions to them at the free surface. Numerical results are obtained for the propagating stress and strain distribution caused by an impact on a two-dimensional plate composed of different materials.