PBX-1炸药的力学性能和本构关系

孙文旭 罗智恒 唐明峰 李明 刘彤 章定国

孙文旭, 罗智恒, 唐明峰, 李明, 刘彤, 章定国. PBX-1炸药的力学性能和本构关系[J]. 爆炸与冲击, 2019, 39(7): 072301. doi: 10.11883/bzycj-2018-0398
引用本文: 孙文旭, 罗智恒, 唐明峰, 李明, 刘彤, 章定国. PBX-1炸药的力学性能和本构关系[J]. 爆炸与冲击, 2019, 39(7): 072301. doi: 10.11883/bzycj-2018-0398
SUN Wenxu, LUO Zhiheng, TANG Mingfeng, LI Ming, LIU Tong, ZHANG Dingguo. Compressive mechanical properties and constitutive relations of PBX-1[J]. Explosion And Shock Waves, 2019, 39(7): 072301. doi: 10.11883/bzycj-2018-0398
Citation: SUN Wenxu, LUO Zhiheng, TANG Mingfeng, LI Ming, LIU Tong, ZHANG Dingguo. Compressive mechanical properties and constitutive relations of PBX-1[J]. Explosion And Shock Waves, 2019, 39(7): 072301. doi: 10.11883/bzycj-2018-0398

PBX-1炸药的力学性能和本构关系

doi: 10.11883/bzycj-2018-0398
详细信息
    作者简介:

    孙文旭(1986- ),男,博士研究生,助理研究员,664729892@qq.com

    通讯作者:

    刘 彤(1964- ),男,研究员,Tliu@swust.edu.cn

  • 中图分类号: O381

Compressive mechanical properties and constitutive relations of PBX-1

  • 摘要: PBX的力学行为对其安全性有重要影响。为研究PBX-1的力学性能,以PBX-1为研究对象,进行准静态力学实验和SHPB(分离式霍普金森压杆)实验研究。结果表明,准静态压缩实验中,试样的裂纹出现在与加载方向大约成45°的最大剪应力方向。SHPB实验中,在应变率100~1 500 s−1范围内,随着应变率的提高,PBX-1炸药的动态屈服强度、动态压缩强度和破坏应变不断提高。动态屈服强度逐渐从静态的2.77 MPa增加至16.1 MPa;压缩强度从7.46 MPa增加至16.1 MPa,破坏应变从6.23%增加到26.4%。同时,基于Z-W-T模型,建立了一种含损伤的动态黏弹性本构模型,在330~1 500 s−1应变率范围内具有较高的精度,可以较好地描述PBX-1炸药在达到破坏前的动态力学行为。
  • 图  1  PBX-1炸药的宏观裂纹形貌

    Figure  1.  Macro crack feature of PBX-1

    图  2  PBX-1炸药的典型细观形貌

    Figure  2.  Typical meso-scale features of PBX-1

    图  3  不同速度加载后的试样破坏状态

    Figure  3.  Damage status under various velocity loading

    图  4  PBX-1炸药不同应变率下的应力(σ)-应变(ε)曲线

    Figure  4.  Stress-strain relationship of PBX-1 under various strain (σ)-rates (ε)

    图  5  PBX-1炸药强度和失效应变随应变率变化

    Figure  5.  Relations between strength/failure strain and strain rate

    图  6  Z-W-T非线性黏弹本构模型

    Figure  6.  Z-W-T non-linear viscoelastic constitutive model

    图  7  实验测试曲线与拟合曲线

    Figure  7.  Comparison between experimental and fitting curves

    图  8  模型计算曲线与实验测试曲线对比($\dot \varepsilon $=660 s−1

    Figure  8.  Comparison between experimental and calculated curves ($\dot \varepsilon $=660 s−1)

    表  1  本构模型材料参数

    Table  1.   Parameter values of constitutive models

    D0 D1 c a σm/MPa m E2/MPa θ2/μs
    8.591 −0.484 1.167 5.480 5.480 43.687 101.156 75.482
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-10-17
  • 修回日期:  2018-12-03
  • 刊出日期:  2019-07-01

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