Numerical simulation of high-velocity projectile penetrating into concrete target using FEM-GPH adaptive coupling algorithm

The generalized smoothed particle hydrodynamics (GPH) method, an upgrade of smoothed particle hydrodynamics (SPH) method, can reflect the real state of failure materials more accurately by changing their volumes and shapes, not just by changing particle volume like SPH method. This paper briefly introduced the GPH method and the Impa3D program, and presented a numerical study on the simulation of high velocity projectile penetrating into concrete using FEM-GPH adaptive coupling algorithm. The simulation results indicate that the FEM-GPH adaptive coupling algorithm transform failure FEM elements into GPH particles which can continue to participate in the computation. Thus, it is a better way in showing the mass erosion and deformation of projectile nose as well as the generation and extension of target crack compared to FEM with erosion algorithm, although it doesn't compute efficiently.