护套密度对钨丝集束弹芯侵彻性能的影响

The Influence of Density of Jacket Materials on the Penetration Performance of WF/Zr-MG Rods

摘要

为探明钨丝/锆基非晶（WF/Zr-MG）（简称＂钨丝集束＂）弹芯护套材料的密度对其侵彻性能的影响，选取2024Al、Q235钢和 HMn55-3-1Cu三种同强度、不同密度的典型材料作为钨丝集束弹芯的护套，通过弹道试验与仿真模拟系统分析三种典型护套弹芯在侵彻C45钢靶板时的破坏模式及侵彻性能。结果表明：2024 Al护套因自身熔点较低，在侵彻过程中易发生严重的侵蚀与汽化，导致复合结构弹芯以＂单独侵蚀＂的方式发生破坏，在侵彻过程中护套未对钨丝集束材料提供径向约束作用；因2024 Al护套质量偏轻，该复合结构弹芯侵彻存速能力较弱，侵彻效率为Q235钢、HMn55-3-1Cu护套弹芯的0.86倍和0.98倍；Q235钢与HMn55-3-1Cu护套弹芯在侵彻过程中均表现为＂共同侵蚀＂的破坏模式，但因HMn55-3-1Cu密度更大，弹芯材料在侵蚀过程中的径向流动更加剧烈，其弹坑平均直径为Q235钢护套弹芯的1.04倍，弹丸的侵彻阻力更大，其侵彻能力仅为Q235钢护套弹芯的0.88倍。合理选择护套材料可有效提升钨丝集束弹芯的侵彻性能，本文结论可为护套铇丝集束穿甲杆的结构设计与优化提供理论支撑。

Abstract

To investigate the influence of density of jacket materials on the penetration performance of tungsten fibre/Zr-based bulk metallic glass（WF/Zr-MG）rod，three typical materials with the same strength but different densities are adopted in this study，namely 2024 Al ，Q235 steel，and HMn55-3-1Cu，as the jacket for composite-structured rod projectiles.Through ballistic experiments and simulation，the failure modes and penetration performance differences of the three types of rod projectiles when penetrating C45 steel targe plates were analyzed.The results show that due to the relatively low melting point，the 2024 Al jacket material is mostly eroded and vaporized during the penetration process，leading to a＂separate erosion＂failure mode of the composite penetrator.In this process，the cladding fails to provide radial constraint to the tungsten fibre bundle.Due to the relatively light weight of 2024 A 1 ，the penetration velocity retention capability of the composite structure rod is weak，and the penetration depth is only 0.86 times and 0.98 times that of the Q235 steeljacketed and HMn55-3-1Cu-jacketed rod，respectively.Both the Q235 steel-jacketed and HMn55-3-1Cu-jacketed rods exhibit a ＂Co-erosion＂ failure mode during penetration.However，due to its higher density，HMn55-3-1Cu intensifies the radial flow of the rod material during the erosion process，and the average diameter of its crater is 1.04 times that of the Q235 steel-jacketed rod.It increases the penetration resistance and reduces its penetration capability to 0.88 times that of the Q235 steel jacketed penetrator.This study confirms that rational selection of jacket materials can significantly enhance the penetration performance of WF/Zr-MG.The conclusions in this study can provide theoretical support for the structural design and optimization of armor-piercing penetrators made of jacketed WF/Zr-MG.

关键词

护套密度 / 钨丝集束弹芯 / 破坏模式 / 侵彻性能

Key words

density of jacket materials / WF/Zr-MG rod / failure mode / penetration performance

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基金资助

国家自然科学基金青年基金项目(12502446)

国家自然科学基金青年基金项目(12102201)

2022 年度安徽省高校自然科学研究项目(2022AH052366)