Study on 3D Computational Method by Coupling SPH Algorithm to Rigid Body Solution

The 3D computational method and technique were studied by coupling SPH algorithm to rigid body solution. Based on the new method and technique, and combining with the Johnson-Cook, Johnson-Holmquist contitutive models, as well as the existing 3D synthetical Lagrangian finite element code CL3D, a new 3D Lagrangian code CRSPH3D was written out. The new code, CRSPH3D, is suitable to be used in the numerical simulation of the 3D problems of rigid projectile penetrating thick targets. The new code was applied to numerically simulate the processes of both rigid projectiles normally and obliquely impacting and perforating aluminum targets and rigid projectiles normally and obliquely impacting and penetrating thick concrete targets. For the problems of projectiles perferating aluminum targets, the simulation results gave good agreement to the experimental ones. And for the problems of projectiles penetrating concrete targets, the obtained results from simulations were qualitatively reasonable.