手枪弹对带UHMWPE软防护明胶靶标冲击效应的数值分析

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (13) : 20-26.

论文

孙非1，马力2，朱一辉1，徐诚1

作者信息 +

Numerical analysis for impact effects of a pistol bullet on a gelatin target covered with UHMWPE fiber armor

SUN Fei1,MA Li2, ZHU Yi-hui1, XU Cheng1

Author information +

文章历史 +

摘要

超高分子量聚乙烯纤维(UHMWPE)防弹衣可以有效地阻止手枪弹的侵彻作用，但仍会对有生目标的机体产生非贯穿钝击伤，其详细机理尚不清楚。非贯穿钝击伤机理可以采用带防护的明胶模拟靶标进行研究，本文建立了手枪弹高速撞击带UHMWPE软防护明胶模拟靶标有限元计算模型，数值模拟了某7.62mm手枪弹对带纤维软防护明胶靶标冲击响应过程，数值计算结果与实验结果基本一致，验证了有限元模型的正确性。研究结果掲示了在该7.62mm手枪弹侵彻过程中，弹体速度、加速度变化规律、软纤维防护层的吸能比例和破坏特征；获得了明胶内瞬时空腔和压力波形成与发展规律，更进一步掲示了手枪弹非贯穿钝击作用力学机理。

Abstract

Although a body armor with ultra-high molecular weight polyethylene (UHMWPE) fibers can prevent bullets to penetrate a soldier’s body tissue and organs, bullets’ energy transmitted to the armor may be transferred to the soldier’s body to produce the behind armor blunt trauma (BABT). The mechanism of BABT is not clarified so far. Here, the mechanism of BABT was studied using a gelatin target covered with armor. A finite element (FE) model was established for a certain 7.62 mm pistol bullet impacting a gelatin target covered with UHMWPE fiber armor. The impact effects of the bullet on the gelatin target were simulated numerically with this FE model. The simulation results agreed well with those of tests to verify the correctness of the FE model. The study results revealed the variation laws of the bullet’s velocity and acceleration, the energy absorption percentage and failure features of UHMWPE fiber layers in bullet penetrating target process. The forming and development laws of transient cavity and pressure wave within the gelatin target were obtained. Thus, the mechanism of BABT due to impact of pistol bullet was deeply clarified.

导出引用

孙非1，马力2，朱一辉1，徐诚1. 手枪弹对带UHMWPE软防护明胶靶标冲击效应的数值分析[J]. 振动与冲击, 2018, 37(13): 20-26

SUN Fei1,MA Li2, ZHU Yi-hui1, XU Cheng1. Numerical analysis for impact effects of a pistol bullet on a gelatin target covered with UHMWPE fiber armor[J]. Journal of Vibration and Shock, 2018, 37(13): 20-26

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