科研之友
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摘要
The Johnson-Cook constitutive relations and damage model were introduced into the reproducing kernel particle (RKP) method, and a new interface calculation method and a collocation method were proposed to solve the problems of interface and gliding particles, realize the boundary conditions and adjust the particle velocity in the computational process. The improved RKP method was applied to numerically analyze the oblique penetration process of a steel cylindrical pellet into a fixed steel plate. In the computation, the pellet and target plate were divided into kernel particles other than elements. Computational results show that the improved RKP method can avoid the finite element deformation in the finite element method and the element reconstruction in the damage process and enhance analysis accuracy and computational speed. And the improved RKP method can be used to conveniently analyze the large deformation and high strain rate phenomena in penetration process.
