Abstract: An aluminum-metallic glass-aluminum sandwich panel was fabricated by explosive welding technique and its property against shaped charge jet penetration was studied experimentally and numerically. Considering the small dimension of the sandwich panel, an experimental scheme was presented for penetration experiment on small specimen (character dimension less than 50 mm); a numerical calculation scheme for simulating the experimental process was developed based on ANSYS/ LS-DYNA. The experimental results indicate that the shaped charge could produce jet with small diameter and good stabilization; wide region petalling is found on the upper surface of the aluminum-metallic glass-aluminum sandwich panel; metallic glass near the jet receives crushing damage, which obstructs the jet penetration; the numerical calculation scheme could simulate the process of penetration effectively; the depth of the penetration, the diameter of the penetration channel and the failure mode obtained by numerical simulation accord with the corresponding experimental results.

Key words: mechanics of explosive, metallic glass, shaped charge, jet, penetration

摘要： 利用爆炸焊接技术成功制备出铝-金属玻璃-铝三层复合板, 并对其抗破甲性能进行了试验及数值分析。针对复合板的尺寸较小的特点, 建立了适用于小试件( 特征尺寸小于 50 mm) 的破甲实验方案;基于动力学软件ANSYS/ LS-DYNA 提出了一套对破甲过程进行数值模拟的计算方案。研究结果表明, 破甲试验装置产生的聚能射流直径较小、稳定性良好, 铝-金属玻璃-铝三层复合板在聚能射流作用下其上表面呈大范围的花瓣形破坏, 中间层的金属玻璃材料呈粉末状破碎, 对后续的射流过程起到了干扰的作用; 计算方案可有效地模拟聚能射流的形成及其对铝-金属玻璃-铝三层复合板的侵彻; 数值模拟得到的破甲深度、稳定阶段侵彻通道的直径、材料的破坏模式与实验结果相符。

关键词: 爆炸力学, 金属玻璃, 聚能装药, 射流, 侵彻