Q235B钢动态本构及在LS-DYNA中的应用

支旭东 张荣 林莉 范峰

支旭东, 张荣, 林莉, 范峰. Q235B钢动态本构及在LS-DYNA中的应用[J]. 爆炸与冲击, 2018, 38(3): 596-602. doi: 10.11883/bzycj-2016-0286
引用本文: 支旭东, 张荣, 林莉, 范峰. Q235B钢动态本构及在LS-DYNA中的应用[J]. 爆炸与冲击, 2018, 38(3): 596-602. doi: 10.11883/bzycj-2016-0286
ZHI Xudong, ZHANG Rong, LIN Li, FAN Feng. Dynamic constitutive model of Q235B steel and its application in LS-DYNA[J]. Explosion And Shock Waves, 2018, 38(3): 596-602. doi: 10.11883/bzycj-2016-0286
Citation: ZHI Xudong, ZHANG Rong, LIN Li, FAN Feng. Dynamic constitutive model of Q235B steel and its application in LS-DYNA[J]. Explosion And Shock Waves, 2018, 38(3): 596-602. doi: 10.11883/bzycj-2016-0286

Q235B钢动态本构及在LS-DYNA中的应用

doi: 10.11883/bzycj-2016-0286
基金项目: 

国家自然基金面上项目 51478144

国家杰出青年科学基金项目 51525802

详细信息
    作者简介:

    支旭东(1977-), 男, 博士, 博导

    通讯作者:

    张荣, zhangrong6636747@163.com

  • 中图分类号: O347.3

Dynamic constitutive model of Q235B steel and its application in LS-DYNA

  • 摘要: 采用万能材料试验机和分离式霍普金森拉杆(SHTB)装置,对我国钢结构建筑中最常用的Q235B钢进行准静态拉伸实验、高温拉伸实验和动态拉伸实验。基于实验数据对LS-DYNA常用的3种动态材料模型Cowper-Symonds本构模型、Johnson-Cook本构模型、Zerilli-Armstrong本构模型进行了拟合,通过Taylor杆实验对3种本构模型进行验证和对比分析。结果表明:Q235B钢具有较为明显的高温软化和应变率强化效应;Cowper-Symonds本构模型可以较好地适用于工程领域低速碰撞的模拟;Johnson-Cook本构模型可适用于较大应变率范围内的模拟;不推荐Zerilli-Armstrong本构模型在工程低速碰撞领域中使用。
  • 图  1  试件形状和尺寸(单位:mm)

    Figure  1.  Geometry and dimensions of specimens(unit: mm)

    图  2  不同工况下拉伸原试件及破坏后试件

    Figure  2.  Original and fractured conditions of specimens

    图  3  不同应变率下Q235B钢的真实应力应变曲线

    Figure  3.  True stress-true strain curves of Q235B steel at different strain-rates

    图  4  不同温度下Q235B钢的拉伸实验真实应力应变曲线

    Figure  4.  True stress-true strain curves of Q235B steel at different temperatures

    图  5  3种本构方程拟合结果

    Figure  5.  Fitted results of three constitutive functions

    图  6  Taylor杆实验与数值模拟形态对比

    Figure  6.  Appearances as compared between simulationand Taylor test results

    图  7  子弹应变率随速度变化曲线

    Figure  7.  Strain-rate curves of projectile at different impact velocity

    图  8  试件尺寸说明

    Figure  8.  Dimensions of specimens

    表  1  Taylor杆数值模拟与实验对比

    Table  1.   Parameters as compared between simulation and Taylor test results

    撞击速度v0/(m·s-1) Taylor杆实验 数值模拟 误差/%
    LF/mm DF/mm 变形模式 本构模型 LF/mm DF/mm 变形模式 LF DF
    C-S 48.2 15.9 镦粗 -0.8 5.3
    122.0 47.8 16.8 镦粗 J-C 48.3 15.0 镦粗 -1.0 10.7
    Z-A 48.8 14.9 镦粗 -2.0 11.3
    C-S 47.4 15.8 镦粗 -1.2 4.8
    153.5 46.8 16.6 镦粗 J-C 47.5 15.7 镦粗 -1.5 5.4
    Z-A 47.9 15.2 镦粗 -2.3 8.4
    C-S 45.1 17.4 镦粗 -4.6 13.0
    225.0 43.1 20.0 镦粗 J-C 44.8 18.4 开裂 -3.9 8.0
    Z-A 45.3 17.2 镦粗 -5.1 14.0
    C-S 43.4 19.6 开裂 -2.1 12.1
    242.5 42.7 22.3 开裂 J-C 43.5 20.9 开裂 -1.9 6.3
    Z-A 43.3 19.9 开裂 -1.4 10.8
    C-S 40.3 23.1 开裂 -7.9 11.4
    279.0 38.9 26.1 开裂 J-C 40.0 24.1 开裂 -2.8 7.6
    Z-A 40.4 23.6 开裂 -3.8 9.6
    C-S 39.9 23.7 开裂 -3.6 11.5
    290.0 38.5 26.8 开裂 J-C 39.2 24.5 开裂 -1.8 8.6
    Z-A 39.3 23.8 开裂 -2.1 11.1
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出版历程
  • 收稿日期:  2016-09-20
  • 修回日期:  2017-02-14
  • 刊出日期:  2018-05-25

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