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Al/PTFE活性材料冲击载荷作用下响应特性研究

任耶平 刘睿 陈鹏万 郭岩松 胡启文 葛超 王海福

任耶平, 刘睿, 陈鹏万, 郭岩松, 胡启文, 葛超, 王海福. Al/PTFE活性材料冲击载荷作用下响应特性研究[J]. 爆炸与冲击, 2022, 42(6): 063103. doi: 10.11883/bzycj-2021-0397
引用本文: 任耶平, 刘睿, 陈鹏万, 郭岩松, 胡启文, 葛超, 王海福. Al/PTFE活性材料冲击载荷作用下响应特性研究[J]. 爆炸与冲击, 2022, 42(6): 063103. doi: 10.11883/bzycj-2021-0397
REN Yeping, LIU Rui, CHEN Pengwan, GUO Yansong, HU Qiwen, GE Chao, WANG Haifu. A study of the response characteristics of Al/PTFE reactive materials under shock loading[J]. Explosion And Shock Waves, 2022, 42(6): 063103. doi: 10.11883/bzycj-2021-0397
Citation: REN Yeping, LIU Rui, CHEN Pengwan, GUO Yansong, HU Qiwen, GE Chao, WANG Haifu. A study of the response characteristics of Al/PTFE reactive materials under shock loading[J]. Explosion And Shock Waves, 2022, 42(6): 063103. doi: 10.11883/bzycj-2021-0397

Al/PTFE活性材料冲击载荷作用下响应特性研究

doi: 10.11883/bzycj-2021-0397
基金项目: 国家自然科学基金(12132003);军委科技委基础加强重点项目(2019-JCJQ-ZD-011-00);爆炸科学与技术国家重点实验室自主课题(QNKT20-07)
详细信息
    作者简介:

    任耶平(1994- ),男,硕士,676936081@qq.com

    通讯作者:

    刘 睿(1985- ),男,博士,助理教授,liurui1985@bit.edu.cn

  • 中图分类号: O389

A study of the response characteristics of Al/PTFE reactive materials under shock loading

  • 摘要: 为了研究铝(Al)/聚四氟乙烯(polytetrafluoroethylene, PTFE)活性材料冲击载荷作用下响应特性,制备了具有反应活性的Al/PTFE块体材料,设计了拉氏实验,采用不同厚度的铝隔板控制入射冲击波幅值,利用锰铜压阻计测量了冲击波在材料中传播过程压力演化过程。同时,基于AUTODYN有限元软件,采用Lee-Tarver三项式点火模型对Al/PTFE活性材料拉氏实验进行数值模拟,并探讨了冲击波在500 mm长的Al/PTFE活性材料中长距离传播行为。研究结果表明,冲击波压力在Al/PTFE活性材料内短距离传播过程中存在明显的衰减,但是,当冲击波传播到远距离时,冲击波压力幅值和冲击波速度趋于稳定,分别为1.3 GPa和2 180 m/s;同时,距离铝隔板越远的材料,其反应度越低并最终趋于0.17。正是由于材料化学反应释能,导致了冲击波压力传播过程最终趋于稳定状态。
  • 图  1  Al/PTFE混合粉末SEM图像和组分EDS图像

    Figure  1.  SEM image and composition EDS images of the Al/PTFE mixed powder

    图  2  Al/PTFE混合粉末XRD分析结果

    Figure  2.  XRD analysis result of the Al/PTFE mixed powder

    图  3  Al/PTFE冷压成型压力-时间曲线

    Figure  3.  Pressure-time curve of Al/PTFE cold-pressed formation

    图  4  尺寸为$\varnothing $50 mm × 3 mm 的Al/PTFE圆片块体

    Figure  4.  Al/PTFE round flakes with the size of $\varnothing $50 mm × 3 mm

    图  5  拉氏实验装置

    Figure  5.  The Lagrangian experimental setup

    图  6  锰铜压阻计

    Figure  6.  Manganese copper pressure sensors

    图  7  在不同铝隔板厚度条件下,冲击波在Al/PTFE材料中传播过程中的压力变化

    Figure  7.  Shock wave pressure changes during shock wave propagation in Al/PTFE materials in the cases of different aluminum partition thicknesses

    图  8  铝隔板厚度分别为10和5 mm时的时间-位移曲线和速度-位移曲线

    Figure  8.  Time-displacement curves and velocity-displacement curves when the aluminum partition thicknesses are 10 and 5 mm, respectively

    图  9  拉氏实验计算模型

    Figure  9.  The calculation model for the Lagrangian experiment

    图  10  在10和5 mm隔板厚度条件下冲击波压力的计算值与实验值

    Figure  10.  Simulated and experimental results of shock pressure with the partition of 10 and 5 mm in thickness

    图  11  拉氏实验500 mm长样品计算模型

    Figure  11.  The calculation model of the Lagrangian experiment for the specimen of 500 mm in length

    图  12  不同铝隔板厚度时压力时间曲线

    Figure  12.  Pressure-time curves with different aluminum partition thicknesses

    图  13  隔板厚度分别为10和2 mm时冲击波速度随传播距离的变化曲线

    Figure  13.  Change of the shock wave velocity with propagation distance when the partition thicknesses are 10 and 2 mm, respectively

    图  14  不同铝隔板厚度时反应度时间曲线

    Figure  14.  Reaction degree-time curves with different aluminum partition thicknesses

    表  1  JWL状态方程参数[29-30]

    Table  1.   JWL-equation-of-state parameters[29-30]

    材料$ {\rho _0} $/(g∙cm−3)A/GPaB/GPaR1R2ω
    PBX-8701[29]1.70852.418.024.61.30.38
    Al/PTFE[30]1.9215.90.00234.61.30.18
    下载: 导出CSV

    表  2  Al隔板材料 Johnson-Cook模型参数

    Table  2.   The Johnson-Cook-model parameters of the aluminum partition

    A/GPaB/GPanCmTm/K
    27.60.4260.340.0151775
    下载: 导出CSV

    表  3  Al/PTFE材料Lee-Tarver点火增长模型参数[30]

    Table  3.   Lee-Tarver ignition-and-growth model parameters for Al/PTFE materials[30]

    I/sbaxG1/(GPa−2∙s−1)cdy
    2×10−50.22042000.6670.3332
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-09-22
  • 修回日期:  2022-01-21
  • 网络出版日期:  2022-05-05
  • 刊出日期:  2022-06-24

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