3种点阵金属三明治板的抗侵彻性能模拟分析

对3种不同的点阵金属芯体三明治板受钢质弹丸侵彻作用下的抗侵彻性能进行了有限元模拟研究,包括空心金字塔三明治板、嵌入陶瓷柱金字塔三明治板和注入环氧树脂陶瓷金字塔三明治板.随着结构、材料复杂性的递增,以期望从中得出各子结构、各材料在三明治板抗侵彻过程中的吸能表现.弹丸作用于板的入射速度及出射速度也是关注的重要参数,用以量化确定三明治结构各组分对弹丸的弹道极限和抗侵彻能力的影响.研究表明,陶瓷材料因其具有高强度和高硬度等特点,可以显著提高金属三明治板结构的抗侵彻能力;环氧树脂材料可使离散的板结构保持整体性,在三明治板受侵彻作用时,吸收大量能量,从而实现大幅提高结构的抗侵彻性能的目的;因其材料/结构的完备性,注入环氧树脂陶瓷金字塔三明治板具有最高的弹道极限速度,抗侵彻能力也最强.

PENETRATION AND PERFORATION PERFORMANCE OF THREE PYRAMIDAL LATTICE-CORED SANDWICH PLATES:NUMERICAL SIMULATIONS

The ballistic performances of three different kinds of sandwich plates with pyramidal lattice cores are numerically evaluated with the method of finite elements, including empty lattice--cored sandwich without any insertion, ceramic filled sandwich, and ceramic and epoxy resin filled sandwich. As the complexity of the sandwich structure and material composition increase, the energy absorption performance of the sub-structures and the sandwich plate as a whole is quantified. Both the incidence and exit velocities of the projectile are considered to establish the ballistic limit as well as the ballistic performance of the sandwich plates. Obtained results reveal that ceramic insertions lead to enhanced penetration resistance of the sandwich due to their high-strength and high-hardness characteristics, whereas the use of epoxy resin improves the integrity of the sandwich so that more energy of the projectile can be absorbed. Therefore, the third type of sandwich (ceramic and epoxy resin filled) achieves the highest ballistic limit velocity and the best ballistic performance mainly due to its structural integrity.