Dynamic response of alumina ceramics impacted by long tungsten projectile

摘要: Abstract In this paper, the dynamic response characteristics of ceramic targets impacted by a long tungsten projectile at high speed are investigated through an improved theoretical model. The model, based on conventional quasi-static cavity expansion theory, takes effect target damage caused penetration constitutive equation into account. A few useful relations resistance and velocity derived from model stationary incompressible hydrodynamic theory. order to examine alumina ceramics impact we set up experimental system high-speed, with its sabot separation device penetrating with/without cover plate, carried out series experiments, compared results calculation numerical simulation results. Theoretical show that 1) anti-penetration ability AD90 is higher than 45# steel, especially, in low-speed stage projectile; 2) material parameters obtained reasonable; 3) plate covered front can improve ability, while constraint sleeve enclosed has little ability; 4) simulations, initiated tensile wave reflected back ceramic, non-plate direct impact, then develops wave; 5) presented paper proven be reasonable, used further studying materials under penetration.