Comparison of MPM and SPH in Hypervelocity Impact Simulation

摘要

Due to the high nonlearities and extreame large deformation, the hypervelocity impact simulation is a challenge task for numerical methods. Two meshless particle methods, SPH and MPM, are promising for the simulation of hypervelocity impact problems. In this paper, a three dimensional MPM computer code MPM3D is developed. The Johnson-Cook material model and Mie-Gruneisen equation of state are implemented to simulate the hypervelocity impact problems. The performance of MPM is compared with SPH by using MPM3D and LS-DYNA SPH module. Numerical studies show that MPM is much more efficient than SPH, especially in large scale problems.