弹靶作用过程中陶瓷基复合材料的表面驻留行为

Dwell Behavior of Ceramic Matrix Composites During the Projectile Penetration

为提高陶瓷基复合材料在轻质装甲结构设计中应用的可行性,研究陶瓷基复合材料在抵抗弹体撞击时的表面驻留性能,进而探索其抗弹性能,旨在丰富和完善陶瓷基复合装甲材料的抗弹机理。采用数模模拟方法对弹体撞击SiC-Al陶瓷基复合材料表面驻留过程开展了深入研究,探索了复合材料的表面驻留行为,对比分析了复合材料和陶瓷材料表面驻留过程中应力水平和损伤演化过程。结果表明:复合材料表面驻留耗能为845J,比B_4C、SiC、AD99Al_2O_3陶瓷材料分别提高约46.0%、30.2%、35.7%;完全损伤的复合材料仍具有较一般陶瓷材料更高的承载能力,延长其驻留持续时间;复合材料损伤演化形式与陶瓷材料差异较大,导致损伤耗能占总驻留耗能的比例达到23.9%,比陶瓷材料提高了2倍多。

With the purpose of increasing application value and revealing the ballistic mechanism of ceramic matrixcomposites,it is necessary to investigate dwell phenomenon and ballistic performance of the material in the processof projectile penetration.In this paper,the behavior law of dwell is studied by utilizing numerical simulation method.Thedwell behavior of aforementioned materials is investigated.Stress level and damage evolution of ceramic composites duringdwell process are analyzed,and compared to common armor ceramics at the same condition.It is concluded that energydissipated during dwell process reaches845J in ceramic composite,respectively increasing by46.0%,30.2%and35.7%to the energy of B4C,SiC and AD99Al2O3.The damage evolution in ceramic during dwell process is different from thatin ceramic and full damaged composites can bear higher compression load than ceramics in the same state.As a result,thedamage energy dissipation of composites accounts for23.9%of the total dwell energy dissipation,which is almost twice asmuch as that dissipated in ceramic.