双硬度靶对球形弹丸的防护性能

Anti-Penetration Performance of Double Hardness Target Impacted by a Spherical Projectile

以钢/铝双硬度爆炸焊接复合靶为研究对象,采用系列弹道实验和数值模拟方法,研究了其在球形弹丸垂直侵彻作用下的抗侵彻性能。侵彻实验利用直径为14.5mm的滑膛枪发射直径为6mm的钢质球形弹丸;采用LS-DYNA3D非线性有限元程序和有限元-光滑粒子流体动力学(FE-SPH)耦合法,进行数值模拟。基于实验和数值模拟结果,分析了不同靶板的毁伤机理和破坏模式,以及靶板厚度、强度等因素对复合靶抗侵彻性能的影响。结果表明:在球形弹丸的垂直侵彻作用下,钢面板发生剪切冲塞破坏,铝背板发生延性扩孔破坏;对于双层靶而言,钢面板与铝背板的厚度比约为2/3时,复合靶的抗侵彻性能最差;数值计算结果与实验结果吻合良好,表明FE-SPH耦合算法可较好地预测双层复合靶板的抗侵彻性能。

Ballistic experiments and numerical simulation were adopted to analyze the anti-penetration performance of double hardness explosively welded steel/aluminum plates penetrated vertically by a spherical projectile. A 14. 5 mm diameter smoothbore gun was used to launch the spherical steel projectile with a diameter of 6 mm,and the finite element code LS-DYNA3D with the coupling algo- rithm of finite element and smoothed particle hydrodynamics （FE-SPH） was applied to simulate the penetration process. The effects of thickness and strength of the explosively welded plates on the anti- penetration performance and damage mechanism were analyzed. The results show that the damage mechanism of the steel front layer is shearing and plugging and that of the aluminum rear layer is pro- longing deformation. For a two-layer steel/aluminum plate, the anti-penetration performance is the worst when the thickness ratio of steel and aluminum plate is about 2/3. The numerical simulation results are well agreed with the experimental ones, so the FE-SPH method can predict the anti- penetration performance of two-layer explosively welded plates well.