在椭圆横截面弹体正侵彻下有限厚铝靶的破坏模式及响应特性

刘均伟 张先锋 赵瑶瑶 魏海洋 刘闯 李鹏程

刘均伟, 张先锋, 赵瑶瑶, 魏海洋, 刘闯, 李鹏程. 在椭圆横截面弹体正侵彻下有限厚铝靶的破坏模式及响应特性[J]. 爆炸与冲击, 2022, 42(12): 123301. doi: 10.11883/bzycj-2022-0249
引用本文: 刘均伟, 张先锋, 赵瑶瑶, 魏海洋, 刘闯, 李鹏程. 在椭圆横截面弹体正侵彻下有限厚铝靶的破坏模式及响应特性[J]. 爆炸与冲击, 2022, 42(12): 123301. doi: 10.11883/bzycj-2022-0249
LIU Junwei, ZHANG Xianfeng, ZHAO Yaoyao, WEI Haiyang, LIU Chuang, LI Pengcheng. Failure modes and response characteristics of finite-thickness aluminum targets under normal penetration of elliptical cross-section projectiles[J]. Explosion And Shock Waves, 2022, 42(12): 123301. doi: 10.11883/bzycj-2022-0249
Citation: LIU Junwei, ZHANG Xianfeng, ZHAO Yaoyao, WEI Haiyang, LIU Chuang, LI Pengcheng. Failure modes and response characteristics of finite-thickness aluminum targets under normal penetration of elliptical cross-section projectiles[J]. Explosion And Shock Waves, 2022, 42(12): 123301. doi: 10.11883/bzycj-2022-0249

在椭圆横截面弹体正侵彻下有限厚铝靶的破坏模式及响应特性

doi: 10.11883/bzycj-2022-0249
基金项目: 国家自然科学基金(12141202,11790292);中央高校基本科研业务费(30919011401)
详细信息
    作者简介:

    刘均伟(1996- ),男,博士研究生,liujunwei@njust.edu.cn

    通讯作者:

    张先锋(1978- ),男,博士,教授,lynx@njust.edu.cn

  • 中图分类号: O385

Failure modes and response characteristics of finite-thickness aluminum targets under normal penetration of elliptical cross-section projectiles

  • 摘要: 基于30 mm口径弹道炮平台,开展了3种不同椭圆横截面弹体在200~600 m/s撞击速度范围内正侵彻2A12铝靶的实验,获得了2A12铝靶的破坏形貌及弹体的剩余速度。在此基础上,建立了相应的数值模型,结合实验结果验证了所建模型的有效性,并系统分析了弹体横截面长短轴长度比对靶体的破坏情况及响应特性的影响。研究结果表明:弹体最大横截面面积是影响弹体剩余速度的主要因素,而弹体横截面长短轴长度比对弹体剩余速度的影响较弱;在圆形横截面弹体侵彻下靶体背部形成的花瓣大小和形状一致,空间分布均匀,而在椭圆横截面弹体侵彻下,随着弹体横截面长短轴长度比的增大,靶体背部形成的花瓣数量增加、尺寸变小,且在短轴方向的花瓣数量和靶体表面隆起高度均大于长轴方向的;靶体在圆形横截面弹体侵彻下的径向位移、径向应力和切向应力与其在椭圆横截面弹体侵彻下的显著不同,前者沿周向方向各点的变化规律基本一致,靶体处于简单的压缩状态,切向应力为零,而后者各点的应力状态与弹体横截面长短轴长度比和周向角密切相关,靶体受到压缩和剪切应力的耦合作用。
  • 图  1  实验弹体

    Figure  1.  Projectiles used in the experiments

    图  2  实验靶体

    Figure  2.  Targets used in the experiments

    图  3  实验布局

    Figure  3.  Experimental layout

    图  4  C1-4弹体飞行姿态分析

    Figure  4.  Analysis of the flight attitude of the C1-4 projectile

    图  5  实验前后C1-4弹体对比

    Figure  5.  Comparison of the C1-4 projectile before and after the experiment

    图  6  不同横截面形状弹体侵彻下铝靶的破坏形貌

    Figure  6.  Damage of aluminum targets under normal penetration of the projectiles with different cross-section shapes

    图  7  有限元模型

    Figure  7.  Finite element models

    图  8  实验靶板破坏形态与数值模拟结果对比

    Figure  8.  Comparison of failure morphologies of targets between simulation and experiment

    图  9  不同横截面形状弹体剩余速度对比

    Figure  9.  Comparison of residual velocities of projectiles with different cross-section shapes

    图  10  弹体横截面长短轴长度比对靶体破坏形貌的影响

    Figure  10.  Influence of major-to-minor axis length ratios of the projectile cross-sections on damage morphologies of the targets

    图  11  靶体应变分布

    Figure  11.  Strain distribution of the targets

    图  12  数值模拟中靶体测点分布

    Figure  12.  Layout of measured points of targets in numerical simulation

    图  13  靶体沿周向方向的径向位移

    Figure  13.  Radial displacement of targets along circumferential direction

    图  14  靶体沿周向方向的径向应力

    Figure  14.  Radial stress of targets along circumferential direction

    图  15  靶体沿周向方向的切向应力

    Figure  15.  Tangential stress of targets along circumferential direction

    图  16  沿周向方向的无量纲径向位移

    Figure  16.  Dimensionless radial displacement of targets along circumferential direction

    图  17  沿周向方向的无量纲径向应力

    Figure  17.  Dimensionless radial stress of targets along circumferential direction

    图  18  沿周向方向的最大切向应力

    Figure  18.  The maximum tangential stress of targets along circumferential direction

    表  1  三种弹体主要参数

    Table  1.   Main parameters of three projectiles

    弹体类型弹体轮廓2a/mm2b/mmβL/mmψm/g
    C123.623.61.0043.23.6360
    T130.018.61.6143.25.6360
    T230.024.01.2543.23.5360
    下载: 导出CSV

    表  2  弹体正侵彻铝靶的实验结果

    Table  2.   Experimental results for normal penetration of projectiles into aluminum targets

    弹体$ {v}_{0} $/(m·s−1)$ {v}_{\mathrm{r}} $/(m·s−1)$ \alpha $/(°)$ \gamma $/(°)
    C1-1402.3336.01.08+0.63
    C1-2310.7214.50.34+0.19
    C1-3256.2120.30.25+0.17
    C1-4566.5522.51.11−0.68
    T1-1402.0338.01.26−0.62
    T1-2229.402.03−1.51
    T1-3570.3531.61.91−1.49
    T2-1405.3322.70.76−0.30
    T2-2229.502.69−2.39
    T2-3569.3509.21.57−1.13
    下载: 导出CSV

    表  3  材料参数

    Table  3.   Material parameters

    材料$\ \rho $/(g·cm−3)G/GPaμA/MPaB/MPanCmD1
    30CrMnSiNi2A[25]7.852100.3
    2A12铝[26]2.77 280.331952300.310.4210.75
    下载: 导出CSV

    表  4  弹体剩余速度模拟结果与实验结果的对比

    Table  4.   Comparison of residual velocities of projectiles between simulation and experiment

    弹体类型v0/(m·s−1)vr/(m·s−1) ɛr/%
    实验数值模拟
    C1256.2120.3109.2−9.2
    310.7214.5202.7−5.5
    402.3336.0323.3−3.8
    566.5522.5510.7−2.3
    T1229.4021.3
    402.0338.0323.5−4.3
    570.3531.6514.5−3.2
    T2229.5000
    405.3322.7302.5−6.3
    569.3509.2497.5−2.3
    下载: 导出CSV

    表  5  靶体背部塑性应变区域范围对比

    Table  5.   Comparison of plastic strain ranges on the back of targets

    弹体类型2a/mm2b/mm长轴最大坐标/mm短轴最大坐标/mm长轴相对增量/%短轴相对增量/%
    C123.6023.6018.5518.5557.2057.20
    T326.4021.1017.3018.0831.0671.37
    T130.0018.6018.1320.1020.87116.13
    T433.3616.6819.1322.3014.69167.39
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-06-08
  • 修回日期:  2022-08-25
  • 网络出版日期:  2022-09-16
  • 刊出日期:  2022-12-08

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