Research on the Damage and Hot-spot Generation in Explosive Charges during Penetration into Single- or Multi-layer Target

被引：0

作者：

Cheng L. ^{[1
]}

Wang D. ^{[1
]}

He Y. ^{[1
]}

机构：

[1] Unit 96901 of PLA, Beijing

来源：

Binggong Xuebao/Acta Armamentarii | 2020年 / 41卷 / 01期

关键词：

Crack friction; Explosive charge; Explosive charge stability; Hot-spot generating mechanism; Pore collapse;

D O I：

10.3969/j.issn.1000-1093.2020.01.004

中图分类号：

学科分类号：

摘要：

It is difficult to study the influencing mechanism of explosive charges stability during the penetration into targets in a complex impact environment. The microscale hot-spot generation models which include crack friction and pore collapse are used to simulate the dynamic response, damage evolution and hot-spot generation of explosive charges during the penetration into the single- and multi-layer targets. The different generating mechanisms of hot-spot are analyzed through simulation and compared with the experimental results. The simulated results show that it is easy to generate the hot-spot in the explosive charges during the penetration into multi-layer target compared with single-layer target, and the explosive charges can easily be damaged more seriously under repeatedly loading and trajectory deflection in the penetration into multi-layer target, which also generates the hot-spot due to crack friction and pore collapse. The areas of head and tail of the explosive charges should be especially protected, where the hot-spots are easily generated. The influence factors, such as penetration velocity, fracture toughness and initial porosity of explosive charges, are analyzed. The stability of explosive charges can be improved by reducing the stress amplitude, decreasing the oscillation times of explosive charges in a shell, increasing the strength of explosive material and reducing the initial defect of charge. © 2020, Editorial Board of Acta Armamentarii. All right reserved.

引用

页码：32 / 39

页数：7

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