高速列车用6008铝合金动态变形本构与损伤模型参数研究

高玉龙 孙晓红

高玉龙, 孙晓红. 高速列车用6008铝合金动态变形本构与损伤模型参数研究[J]. 爆炸与冲击, 2021, 41(3): 033101. doi: 10.11883/bzycj-2020-0119
引用本文: 高玉龙, 孙晓红. 高速列车用6008铝合金动态变形本构与损伤模型参数研究[J]. 爆炸与冲击, 2021, 41(3): 033101. doi: 10.11883/bzycj-2020-0119
GAO Yulong, SUN Xiaohong. On the parameters of dynamic deformation and damage models of aluminum alloy 6008-T4 used for high-speed railway vehicles[J]. Explosion And Shock Waves, 2021, 41(3): 033101. doi: 10.11883/bzycj-2020-0119
Citation: GAO Yulong, SUN Xiaohong. On the parameters of dynamic deformation and damage models of aluminum alloy 6008-T4 used for high-speed railway vehicles[J]. Explosion And Shock Waves, 2021, 41(3): 033101. doi: 10.11883/bzycj-2020-0119

高速列车用6008铝合金动态变形本构与损伤模型参数研究

doi: 10.11883/bzycj-2020-0119
详细信息
    作者简介:

    高玉龙(1983- ),男,硕士,高级工程师,gaoyulong.sf@crrcgc.cc

    通讯作者:

    孙晓红(1988- ),男,硕士,工程师,sunxiaohong.sf@crrcgc.cc

  • 中图分类号: O341

On the parameters of dynamic deformation and damage models of aluminum alloy 6008-T4 used for high-speed railway vehicles

  • 摘要: 高速列车在实际服役过程中会经受复杂的应力状态和环境条件,铝合金型材以其优良的力学和加工性能被广泛应用于新型高速列车的吸能结构,其防撞性能对高速列车的安全运行至关重要。本文针对一种新型轨道车辆用材料6008-T4铝合金型材进行了多种力学性能测试,包括动静态拉压实验、准静态高低温实验、不同应力路径的断裂实验等,提出了一种计算局部断裂应变的新方法,进而标定和获取了Johnson-Cook本构和损伤模型参数。最后利用平板侵彻实验来对所获取的参数进行检验,发现模拟和实验结果吻合良好,说明本文所获取的参数和参数标定方法都是有效的。
  • 图  1  初始材料的EBSD取向成像图

    Figure  1.  EBSD inverse pole figure maps of initial materials

    图  2  试样形貌和尺寸(单位:mm)

    Figure  2.  Configurations and sizes of the samples (unit: mm)

    图  3  铝合金单轴拉伸和压缩真实应力应变曲线

    Figure  3.  True stress-strain curves of the aluminum alloys under uniaxial tension and compression

    图  4  J-C模型拟合曲线

    Figure  4.  J-C fitting to experimental curves

    图  5  模拟塑性变形场演化过程

    Figure  5.  Evolution of simulated plastic strain fields in the samples

    图  6  模拟与实验获得的力-位移曲线

    Figure  6.  Force-displacement curves according to experiment and simulation

    图  7  变形区局部应变和应力三轴度曲线

    Figure  7.  Evolution of the local strain and stress triaxiality in deformation areas

    图  8  双缺口试样局部断裂应变

    Figure  8.  Local fracture strain of the double notch specimen

    图  9  归一化断裂应变随应力三轴度的变化

    Figure  9.  Variation of local fracture strain with stress triaxiality

    图  10  不同应变率下室温铝合金单轴拉伸/压缩的真实应力应变曲线

    Figure  10.  True stress-strain curves of aluminum alloys due to uniaxial tension/compression at different strain rates and room temperature

    图  11  应变为5%处的归一化流动应力

    Figure  11.  Normalized flow stress at the strain of 5%

    图  12  归一化断裂应变随应变率对数的变化关系

    Figure  12.  Normalized fracture strain varying with the logarithmic normalized strain rates

    图  13  不同环境温度下6008-T4铝合金准静态单轴拉伸真实应力应变曲线

    Figure  13.  Quasi-static true stress-strain curves of 6008-T4 aluminum alloys by uniaxial tension at different temperatures

    图  14  归一化屈服应力随归一化温度的变化关系

    Figure  14.  Normalized fracture strain varying with the normalized temperature

    图  15  归一化断裂应变随归一化温度的变化关系

    Figure  15.  Normalized yield stress varies with the normalized temperature

    图  16  实验与J-C模型结果对比

    Figure  16.  Comparison between experimental results and J-C model predictions

    图  17  侵彻实验子弹的形状和尺寸(单位:mm)

    Figure  17.  Shape and size of the bullets (Unit: mm)

    图  18  靶板受侵彻破坏过程的实验与模拟形态

    Figure  18.  Fracture morphologies of the target after penetration: comparison between the experiments and modeling

    图  19  侵彻加载下靶板破坏形貌的实验和模拟结果

    Figure  19.  Fracture morphologies of the target after penetration by experiments and simulation

    表  1  6008-T4铝合金J-C本构和损伤断裂参数

    Table  1.   J-C constitutive and damage parameters of the 6008-T4 aluminum alloy

    A/MPaB/MPanCmD1D2D3D4D5
    1501010.190.00791.0600.2840.677−2.4610.0131.60
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出版历程
  • 收稿日期:  2020-04-22
  • 修回日期:  2020-10-07
  • 网络出版日期:  2021-03-05
  • 刊出日期:  2021-03-10

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