Numerical Simulation for Impact Fragmentation of Jacket Grooved PELE

Abstract

In order to study the influence of groove parameters on impact fragmentation of penetrator with lateral effect(PELE), the smoothing particle hydrodynamics method, Johnson-Cook strength model, the maximum principal stress failure and stochastic failure criteria were used to establish numerical model to simulate the fragmentation of projectile. The validity of the numerical model was verified by experimental results. The uniform design method was used to design the numerical simulation program and the level table of the number of grooves, groove angle, groove depth, and the fragmentation of projectile was analyzed. The research results show that the fragmentation of PELE can be effectively simulated by the numerical model; the longitudinal fracture of projectile jacket begins along the grooves, and the fragments produced by the fragmentation of projectile jacket are mostly long strips. The fragmentation degree of the projectile changes parabolically with the number of grooves and decreases with the increase of groove angle, and it is positively related to the product of groove number and groove depth. The numerical calculation model and research method can be used to study the impact fragmentation of solid materials.