关键词: 平头弹, 复合靶板, 侵彻, 陶瓷锥, 厚度比, 数值模拟

Abstract:

The numerical simulation of the penetration of composite ceramic/metal armours was carried out bv using a large-scMe nonlinear Finite Element code IS-DYNA. Some processes in the penetration, such as the forming process of the conoid-shaped zone of the fragmented ceramic,the bending and cracking processes of the metal back-up plate,the mushrooming of the projectile and the vanishing process of the projectile head,were then investiga-ted.Furthermore,the curves of the coordinates of the projectile.armor interface and the rear end of the Drojectile varied with time were given.The simulated results are compared with the results of a theoretical analVSis aS well as the experimental results.It is concluded that the three kinds of results match fairly well with each other. The effect of the ratio of the ceramic thickness to the metal backup plate thickness on the impacticn-resistance abilitv of the composite arm our is also analyzed,with the result indicating that there is an optimum ratio for the impaction-resist-ance ability.This conclusion is valuable for the design of composite ceramic/metal armours.

Key words: flat-nosed projectile, composite arm our, penetration, ceramic conoid, thickness ratio, numerical sim-ulation