侵彻双层靶板过程中PBX装药的宏-细观损伤数值模拟研究

张晓微 赵河明 郑晓波 张巧 王志军 肖有才

张晓微, 赵河明, 郑晓波, 张巧, 王志军, 肖有才. 侵彻双层靶板过程中PBX装药的宏-细观损伤数值模拟研究[J]. 高压物理学报, 2024, 38(6): 064201. doi: 10.11858/gywlxb.20240795
引用本文: 张晓微, 赵河明, 郑晓波, 张巧, 王志军, 肖有才. 侵彻双层靶板过程中PBX装药的宏-细观损伤数值模拟研究[J]. 高压物理学报, 2024, 38(6): 064201. doi: 10.11858/gywlxb.20240795
ZHANG Xiaowei, ZHAO Heming, ZHENG Xiaobo, ZHANG Qiao, WANG Zhijun, XIAO Youcai. Numerical Simulation Study on Macro-Microscopic Damage of PBX Charge during Penetration of Double-Layer Targets[J]. Chinese Journal of High Pressure Physics, 2024, 38(6): 064201. doi: 10.11858/gywlxb.20240795
Citation: ZHANG Xiaowei, ZHAO Heming, ZHENG Xiaobo, ZHANG Qiao, WANG Zhijun, XIAO Youcai. Numerical Simulation Study on Macro-Microscopic Damage of PBX Charge during Penetration of Double-Layer Targets[J]. Chinese Journal of High Pressure Physics, 2024, 38(6): 064201. doi: 10.11858/gywlxb.20240795

侵彻双层靶板过程中PBX装药的宏-细观损伤数值模拟研究

doi: 10.11858/gywlxb.20240795
基金项目: 国家自然科学基金(11802273,12372368);山西省基础研究面上项目(202303021211142);国防科工局基础科研重点项目(JCKY2017207B055)
详细信息
    作者简介:

    张晓微(1986-),女,博士研究生,主要从事弹药安全研究. E-mail:hgdzhangxiaowei@163.com

    通讯作者:

    肖有才(1988-),男,博士,副教授,主要从事材料动态力学、损伤力学、爆炸与冲击相关问题研究. E-mail:xiaoyoucai@nuc.edu.cn

  • 中图分类号: O381; O521.9

Numerical Simulation Study on Macro-Microscopic Damage of PBX Charge during Penetration of Double-Layer Targets

  • 摘要: 针对高速战斗部侵彻双层目标时装药的损伤问题,基于内聚力模型开展了PBX装药战斗部侵彻双层靶板的数值模拟研究。采用内聚力模型计算装药损伤的出现与演化,分析了侵彻速度与损伤发生的关系,通过损伤比对侵彻结束后PBX装药的损伤进行了量化,建立了PBX装药细观损伤仿真模型,研究了侵彻双层靶板过程中PBX装药细观损伤机制。结果表明:当弹体垂直侵彻双层靶板时,在压-拉反复作用下,装药尾部形成了垂直于加载方向的贯穿裂纹,且装药的损伤程度随着侵彻速度的增大而增大;在侵彻双层靶板过程中,PBX装药的主要损伤模式是界面脱粘,微裂纹最先出现在颗粒边角处,并且逐渐增多,最终界面微裂纹失稳扩展并汇聚为连续的主裂纹。

     

  • 图  有限元模型

    Figure  1.  Finite element model

    图  弹体几何参数

    Figure  2.  Geometric parameters of the projectile

    图  有限元模型中的载荷施加

    Figure  3.  Loading configuration in the finite element model

    图  内聚力单元的双线性力-位移定律模型

    Figure  4.  Bilinear traction-separation law model of cohesive element

    图  有限元模型中的内聚力单元

    Figure  5.  Cohesive elements in the finite element model

    图  PBX在2000 s−1应变率下的应力-应变曲线

    Figure  6.  Stress-strain curves of PBX at the strain rate of 2000 s−1

    图  数值模拟得到的装药内部损伤演化历程

    Figure  7.  Damage evolution contour of explosive charge obtained from numerical simulation

    图  侵彻结束后装药CT扫描重构图像

    Figure  8.  Reconstruction of CT scan of the charge after penetration

    图  不同侵彻速度侵彻后装药的损伤

    Figure  9.  Damage contour of explosive charge after penetration at different velocities

    图  10  装药尾部易损伤区域的轴向和径向应力时程曲线及边界条件

    Figure  10.  Axial and radial stress histories and boundary conditions at the danger zone of the charge tail region

    图  11  侵彻双层靶板过程中PBX装药细观结构的主应变分布

    Figure  11.  Principal strain distributions for microscopic model during the penetration of double-layer target

    图  12  侵彻双层靶板过程中PBX装药的损伤演化

    Figure  12.  Damage evolution process of PBX during penetration of double-layer target

    表  1  弹壳、靶板和缓冲层的材料参数

    Table  1.   Parameters of projectile shell, target, and buffer layer

    Material $ \rho $/(kg·m−3) μ E/GPa A/MPa B/MPa n C m $ {\dot \varepsilon _0} $/s−1
    35CrMnSi steel 7830 0.30 204 1440 1501 0.4403 0.039 0.404 10−3
    45 steel 7830 0.33 210 496 434 0.2600 0.014 1.030 1.0
    Polycarbonate 1190 0.38 3.6 84 3228 3.1456 0.089 1.010 0.1
    下载: 导出CSV

    表  2  PBX装药的内聚力单元参数

    Table  2.   Cohesive elements parameters of PBX charge

    Kcoh/(GPa·m−1)$ \sigma $/MPaG/(kN·m−1)
    1700230.17
    下载: 导出CSV

    表  3  PBX装药颗粒、黏结剂和界面内聚力单元参数

    Table  3.   Cohesive elements parameters of particle, binder and interface

    Cohesive elementKcoh/(GPa·m−1)$ \sigma $/MPaG/(kN·m−1)
    Particle18006.000.010
    Binder9007.500.150
    Particle-binder interface8002.750.012
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-04-18
  • 修回日期:  2024-05-17
  • 网络出版日期:  2024-08-30
  • 刊出日期:  2024-12-05

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