杆式EFP用钽钨合金JC失效模型参数

门建兵 卢易浩 蒋建伟 付恒 韩伟

门建兵, 卢易浩, 蒋建伟, 付恒, 韩伟. 杆式EFP用钽钨合金JC失效模型参数[J]. 高压物理学报, 2020, 34(6): 065105. doi: 10.11858/gywlxb.20200550
引用本文: 门建兵, 卢易浩, 蒋建伟, 付恒, 韩伟. 杆式EFP用钽钨合金JC失效模型参数[J]. 高压物理学报, 2020, 34(6): 065105. doi: 10.11858/gywlxb.20200550
MEN Jianbing, LU Yihao, JIANG Jianwei, FU Heng, HAN Wei. Johnson-Cook Failure Model Parameters of Tantalum-Tungsten Alloy for Rod-Shaped EFP[J]. Chinese Journal of High Pressure Physics, 2020, 34(6): 065105. doi: 10.11858/gywlxb.20200550
Citation: MEN Jianbing, LU Yihao, JIANG Jianwei, FU Heng, HAN Wei. Johnson-Cook Failure Model Parameters of Tantalum-Tungsten Alloy for Rod-Shaped EFP[J]. Chinese Journal of High Pressure Physics, 2020, 34(6): 065105. doi: 10.11858/gywlxb.20200550

杆式EFP用钽钨合金JC失效模型参数

doi: 10.11858/gywlxb.20200550
基金项目: 国家自然科学基金(1187020967)
详细信息
    作者简介:

    门建兵(1973-),男,博士,副教授,主要从事毁伤与弹药工程研究. E-mail:menjb@bit.edu.cn

    通讯作者:

    蒋建伟(1962-),男,博士,教授,主要从事毁伤与弹药工程研究. E-mail:bitjjw@bit.edu.cn

  • 中图分类号: O385; TJ410

Johnson-Cook Failure Model Parameters of Tantalum-Tungsten Alloy for Rod-Shaped EFP

  • 摘要: 针对目前数值仿真不能有效预测钽钨合金药型罩聚能装药杆式爆炸成型弹丸(Explosive formed projectile,EFP)的爆炸成型和断裂问题,开展了钽钨合金材料在不同应力、应变率以及温度条件下的力学性能实验,通过实验数据拟合得到了材料的Johnson-Cook失效模型参数。基于LS-DYNA嵌入该套模型参数开展了典型球缺钽钨药型罩EFP的成型仿真,通过同结构聚能装药静爆脉冲X射线摄影实验对仿真形成的EFP形状和速度计算结果进行对比验证。结果表明:将实测Johnson-Cook失效模型参数应用于杆式EFP成型的数值仿真时,各项成型参数的计算结果(形状、速度等)与实验结果的相对误差均小于9%,实现了对杆式EFP成型及断裂的准确预测。

     

  • 图  缺口试件尺寸(单位:mm)

    Figure  1.  Size of the notched specimen (Unit:mm)

    图  拉伸实验前后不同缺口试件照片

    Figure  2.  Notched specimens before and after tensile tests

    图  失效应变与应力三轴度的关系

    Figure  3.  Relationship between fracture strain and stress triaxiality

    图  圆柱试件加持状态照片

    Figure  4.  Clamped cylindrical specimen

    图  光滑圆柱试件尺寸(单位:mm)

    Figure  5.  Smooth cylindrical specimen (Unit:mm)

    图  不同应变率拉伸实验前后光滑圆柱试件照片

    Figure  6.  Smooth cylindrical specimens before and after tensile tests at different strain rates

    图  失效应变与应变率的关系

    Figure  7.  Relationship between fracture strain and the logarithmic non-dimensional strain rate

    图  不同温度下拉伸实验前后光滑圆柱试件照片

    Figure  8.  Smooth cylindrical specimens before and after tensile tests at different temperatures

    图  失效应变与温度的关系

    Figure  9.  Relationship between fracture strain and temperature

    图  10  EFP 装药结构的几何模型

    Figure  10.  Geometric model of EFP charge structure

    图  11  EFP成型数值计算网格模型

    Figure  11.  Simulation model of EFP

    图  12  EFP实验战斗部部件

    Figure  12.  Components of EFP warhead

    图  13  脉冲X射线摄影实验现场布置

    Figure  13.  Scene of pulsed X-ray imaging experiment

    表  1  钽钨合金化学成分

    Table  1.   Chemical composition of tantalum tungsten alloy (%)

    NbWMoNOSi
    0.006 62.830 00.001 00.001 50.007 10.001 0
    下载: 导出CSV

    表  2  数值模拟中采用的材料模型参数

    Table  2.   Material models used in the numerical simulation

    ComponentMaterial$\,\rho $/(g∙cm−3)Equation of stateConstitutive relationFailure model
    LinerTa-W16.65GrüneisenJohnson-CookNone (Ⅰ)
    Johnson-Cook (Ⅱ)
    Shell45 steel7.83GrüneisenJohnson-CookNone
    ChargeJH-21.71JWLHigh-Explosive-BurnNone
    下载: 导出CSV

    表  3  钽钨合金的Johnson-Cook本构模型参数[16]

    Table  3.   Material parameters of Johnson-Cook constitutive model for Ta-W[16]

    A/MPaB/MPanCm
    2113810.750.0680.38
    下载: 导出CSV

    表  4  数值模拟与实验得到的EFP成型形态对比

    Table  4.   Comparisons of EFP forming states in numerical simulation and experiment

    $\delta $/mmSimulation Ⅰ
    (Without failure model)
    Simulation Ⅱ
    (With failure model)
    X-ray imaging
    experiment
    Forming time/
    μs
    2.0300
    1.5270
    下载: 导出CSV

    表  5  数值模拟与实验得到的EFP成型参数对比

    Table  5.   Comparisons of EFP forming results in numerical simulation and experiment

    $\delta $/mmMethodVelocity/(m·s–1)Length/mmDiameter/mm
    2.0Simulation Ⅰ171841.611.4
    Simulation Ⅱ171841.611.4
    Experiment177041.310.8
    1.5Simulation Ⅰ196851.58.9
    Simulation Ⅱ202136.1+14.710.4
    Experiment212033.2+15.610.1
    下载: 导出CSV
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  • 收稿日期:  2020-04-22
  • 修回日期:  2020-04-29

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