Ballistic reliability study on SiC/UHMWPE composite armor against armor-piercing bullet
Ballistic reliability study on SiC/UHMWPE composite armor against armor-piercing bullet
复制标题
SiC/UHMWPE复合装甲抗穿甲弹弹道可靠性研究
DOI：
10.1016/j.compstruct.2019.01.078
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发表时间：
2019-04
影响因子：
6.3
通讯作者：
Han Xu
中科院分区：
文献类型：
--
作者：
Shen Zhiwei;Hu Dean;Yang Gang;Han Xu
复合装甲的抗弹可靠性受材料随机性能的影响较大。本文对镶嵌SiC陶瓷/超高分子量聚乙烯（UHMWPE）复合材料靶板进行了近极限弹道侵彻试验。材料和粘结性能的不确定性导致在子弹初速分别为776 m/s和791 m/s时，靶板完全侵彻和部分侵彻，而靶板的鼓包变形与靶板最小厚度呈相反的趋势。基于已验证的数值模型，建立了用于可靠性评估的侵彻状态函数。敏感性分析结果表明，12个不确定性材料参数对侵彻状态具有较强的敏感性。在此基础上，分别采用蒙特卡罗法和设计点法计算了试验速度下的弹道可靠度。最后，建立了一个概率约束的优化问题，以实现最小变形。结果表明，胀形变形量和穿透状态函数值随粘结强度的变化规律相反。因此，设计粘合强度以控制变形和最小目标厚度之间的矛盾。这对认识复合装甲的不确定性，提高复合装甲抗穿甲弹的性能具有重要意义。
The ballistic reliability of composite armors is significantly affected by the random material properties. In this paper, the mosaic SiC ceramics/ultra high molecular weight polyethylene (UHMWPE) composite targets with bonding adhesives are tested near the limit ballistic penetration conditions. The uncertain material and adhesive properties led to complete penetration and partial penetration at bullet initial velocity of 776 m/s and 791 m/s, respectively, and a contrary tendency is also observed in the tests between the bulging deformation and the minimum target thickness of back plate. A state function of penetration for reliability evaluation is formulated based on a validated numerical model. Results from sensitivity analysis indicate that twelve uncertain material parameters are strongly sensitive to the penetration state. Then, the ballistic reliability under the test velocities is obtained by both Monte Carlo method and design point method. Finally, an optimization problem with a probability constraint is established in order to achieve a minimum deformation. The results show that the bulging deformation and the value of penetration state function vary with the adhesive strengths oppositely. Therefore, the adhesive strengths are designed to control the contradiction between the deformation and the minimum target thickness. It is significant to recognize the uncertain properties of composite armors and to improve the ballistic performance against armor-piercing bullet.
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作者：
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影响因子：
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