A New Approach for the Failure of Metallic Materials

ZHOU Lin WEN Heming

周琳, 文鹤鸣. 金属材料失效分析的新方法[J]. 高压物理学报, 2019, 33(1): 014103. doi: 10.11858/gywlxb.20180613
引用本文: 周琳, 文鹤鸣. 金属材料失效分析的新方法[J]. 高压物理学报, 2019, 33(1): 014103. doi: 10.11858/gywlxb.20180613
ZHOU Lin, WEN Heming. A New Approach for the Failure of Metallic Materials[J]. Chinese Journal of High Pressure Physics, 2019, 33(1): 014103. doi: 10.11858/gywlxb.20180613
Citation: ZHOU Lin, WEN Heming. A New Approach for the Failure of Metallic Materials[J]. Chinese Journal of High Pressure Physics, 2019, 33(1): 014103. doi: 10.11858/gywlxb.20180613

A New Approach for the Failure of Metallic Materials

doi: 10.11858/gywlxb.20180613
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    Author Bio:

    ZHOU Lin (1988—), female, doctoral student, major in impact dynamics. E-mail: zlxzh@mail.ustc.edu.cn

    Corresponding author: WEN Heming(1965—), male, Ph.D, professor, major in impact dynamics. E-mail: hmwen@ustc.edu.cn
  • 摘要: 提出了一种预测金属材料失效的新方法,该失效准则考虑了应力三轴度和Lode角参数的影响。将金属材料分为 ēf>efēfef 两类,其中 ēfef 分别定义为应力三轴度η=1/3、Lode角参数ξ=1(轴对称应力状态)和应力三轴度η=1/3、Lode角参数ξ=0(平面应变状态)时的真实应变。另外只需要两个常见的实验(光滑圆杆拉伸试验和纯剪试验)数据就可以确定失效准则的参数值。将该新失效准则与文献中报道的诸多材料在不同加载条件下的实验数据进行对比,结果吻合较好。

     

  • Figure  1.  Definition of parameters in the space of εf and η

    Figure  2.  Schematic diagrams of the failure loci for metallic materials in the space of εf and ξ for η=1/3

    Figure  3.  Definition of the stress triaxiality corresponding to the true fracture strain in a smooth bar tension test

    Figure  5.  Comparison of the newly developed failure criterion with the test data for Armco iron (Johnson and Cook[2]) in the space of εf and η. Red line: Johnson-Cook failure criterion[2]; black lines: the present model (Eq.(8))

    Figure  6.  Comparison of the newly developed failure criterion with the test data for OFHC copper (Johnson and Cook[2]) in the space of εf and η. Red line: Johnson-Cook failure criterion[2]; black lines: the present model (Eq.(8))

    Figure  7.  Comparison of the newly developed failure criterion with test data for 1045 steel (Bai et al.[15]) in the space of εf and η. Red line: Johnson-Cook failure criterion[2]; green lines: model proposed by Xue and Wierzbicki[6]; black lines: the present model (Eq.(8))

    Figure  8.  Comparison of the newly developed failure criterion with the test data for 2024-T351 aluminum alloy (Wierzbicki et al.[6]; Bao[14]) in the space of εf and η. Red line: Johnson-Cook failure criterion[2]; green lines: the model proposed by Xue and Wierzbicki[6]; black lines: the present model (Eq.(8))

    Figure  4.  Comparison of the newly developed failure criterion with the test data for 4340 steel (Johnson and Cook[2]) in the space of εf and η. Red line: Johnson-Cook failure criterion[2]; black lines: the present model (Eq.(8))

    Figure  9.  Comparison of the newly developed failure criterion with the test data for Inconel 718 nickel-base superalloy in the space of εf and η. Red line: Johnson-Cook failure criterion[2]; green lines: the model proposed by Xue and Wierzbicki[6]; black lines: the present model (Eq.(8))

    Table  1.   Values of constants in the Johnson-Cook failure criterion[2] and the model proposed by Xue and Wierzbicki[6]

    Materials Johnson-Cook failure criterion Model proposed by Xue and Wierzbicki
    D1 D2 D3 c1 c2 c3 c4
    4340 steel 0.05[2] 3.44[2] –2.12[2]
    Armco iron –2.20[2] 5.43[2] –0.47[2]
    OFHC copper 0.54[2] 4.89[2] –3.03[2]
    1045 steel 0.06 1.72 –2.58 1.511 0 2.110 2 0.480 0 1.738 8
    2024-T351 0.13[6] 0.13[6] –1.50[6] 1.466 0 2.394 0 0.210 0 0.005 0
    Inconel 718[16] 0.04[16] 0.75[16] –1.45[16] 0.525 1 1.010 9 1.100 0 1.188 7
    Inconel 718[18] 0.04 1.54 –1.60
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出版历程
  • 收稿日期:  2018-08-09
  • 修回日期:  2018-08-27

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