基于夏比冲击试验的材料失效模型参数

徐小东 李华良 张涛

徐小东, 李华良, 张涛. 基于夏比冲击试验的材料失效模型参数[J]. 爆炸与冲击, 2016, 36(1): 57-63. doi: 10.11883/1001-1455(2016)01-0057-07
引用本文: 徐小东, 李华良, 张涛. 基于夏比冲击试验的材料失效模型参数[J]. 爆炸与冲击, 2016, 36(1): 57-63. doi: 10.11883/1001-1455(2016)01-0057-07
Xu Xiaodong, Li Hualiang, Zhang Tao. Parameters for the material failure model based on Charpy impact test[J]. Explosion And Shock Waves, 2016, 36(1): 57-63. doi: 10.11883/1001-1455(2016)01-0057-07
Citation: Xu Xiaodong, Li Hualiang, Zhang Tao. Parameters for the material failure model based on Charpy impact test[J]. Explosion And Shock Waves, 2016, 36(1): 57-63. doi: 10.11883/1001-1455(2016)01-0057-07

基于夏比冲击试验的材料失效模型参数

doi: 10.11883/1001-1455(2016)01-0057-07
基金项目: 

国家自然科学基金项目 10702022

华中科技大学青年教师基金项目 0114140034

详细信息
    作者简介:

    徐小东(1990-),男,硕士

    通讯作者:

    张涛, zhangt7666@hust.edu.cn

  • 中图分类号: O346.1

Parameters for the material failure model based on Charpy impact test

  • 摘要: 结合夏比冲击试验和ABAQUS显式动力数值模拟,对Q370d钢进行了Johnson-Cook失效模型参数研究。首先,在不考虑材料失效的情况下,通过3种不同厚度的无缺口试件冲击实验对有限元模型参数设置和材料本构模型的准确性进行了验证,同时还讨论了试件断裂区网格的合适尺寸;在此基础上,基于正交设计,通过大量的有限元数值模拟得到失效模型参数样本,利用回归分析求得冲击功与失效模型参数的回归方程组;最后结合夏比V型缺口冲击试验,求解Q370d钢的失效模型参数,并对断裂截面的力学特性进行了分析,可为工程应用提供参考。
  • 图  1  夏比冲击试验V型缺口试件的几何、网格图

    Figure  1.  Geometry and grid for Charpy V-notch test specimen

    图  2  标准试件的最终变形

    Figure  2.  Final deformation of the standard specimens

    图  3  材料破坏的典型应力应变曲线

    Figure  3.  Typical stress-strain curvesduring the material damage progress

    图  4  V型缺口试件的最终变形

    Figure  4.  Final deformation of V-notch specimens

    图  5  实验冲头力

    Figure  5.  Experimental punch loads

    图  6  计算和实验的冲头力

    Figure  6.  Computed and experimental punch loads

    图  7  V型缺口试件计算的最终变形及观测点

    Figure  7.  Computed final deformation of V-notch specimensand location of observation points

    图  8  观测点的等效塑性应变与等效应力曲线

    Figure  8.  Curves of equivalent stress vsequivalent plastic strain at observation points

    图  9  试件断裂截面上单元应力三轴度曲线

    Figure  9.  Stress triaxiality curves of observation elements at the fracture cross-sections of specimens

    表  1  标准试件的实验和数值模拟结果

    Table  1.   Experimental and simulated results of the standard specimens

    W/mm Ak, exp/J Ak, num/J εAk/% dt, exp/mm dt, num/mm εdt/% dc, exp/mm dc, num/mm εdc/% lexp/mm lnum/mm εl/%
    4 181.7 180.3 -0.8 6.86 7.26 5.8 2.52 2.69 6.7 24.93 23.89 -4.2
    5 226.6 224.7 -0.8 8.17 8.71 6.6 3.22 3.39 5.3 25.37 24.04 -5.5
    6 277.8 270.6 -2.6 9.40 9.94 5.7 3.91 4.09 4.6 25.33 23.87 -6.1
    下载: 导出CSV

    表  2  不同断裂区网格尺寸下的冲击功、摆锤冲击力

    Table  2.   Impact energy and pendulum forcein plane models with different mesh sizes

    Δd/mm Ak1/J Ak2/j Fm/kN
    0.300 14.69 9.45 0.417
    0.200 14.69 8.12 0.334
    0.100 14.78 7.14 0.277
    0.075 14.81 7.36 0.291
    0.050 14.81 6.99 0.275
    下载: 导出CSV

    表  3  JC失效模型的正交设计试验表

    Table  3.   Orthogonal design parameters for JC failure model

    No. D1 D2 D3 Ak/J
    W=10 mm W=6 mm W=4 mm
    1 0.15 3 -1.8 151.57 89.04 57.61
    2 0.15 4 -2.2 130.82 79.83 53.25
    3 0.15 5 -2.6 113.26 67.86 46.08
    4 0.15 6 -3.0 95.71 56.69 38.84
    5 0.15 7 -3.4 81.50 47.67 32.54
    6 0.20 3 -2.6 97.34 56.13 44.43
    7 0.20 4 -3.0 92.88 54.81 34.06
    8 0.20 5 -3.4 91.53 48.69 33.76
    9 0.20 6 -1.8 287.76 185.80 107.57
    10 0.20 7 -2.2 253.14 160.20 100.67
    11 0.25 3 -3.4 87.83 48.38 31.22
    12 0.25 4 -1.8 232.39 137.77 84.92
    13 0.25 5 -2.2 203.56 122.17 77.73
    14 0.25 6 -2.6 169.53 103.94 67.87
    15 0.25 7 -3.0 150.13 87.96 57.72
    16 0.30 3 -2.2 160.57 91.74 57.25
    17 0.30 4 -2.6 152.92 87.35 54.97
    18 0.30 5 -3.0 141.67 80.70 50.92
    19 0.30 6 -3.4 129.61 73.81 46.59
    20 0.30 7 -1.8 288.63 193.92 114.43
    21 0.35 3 -3.0 130.85 73.26 44.74
    22 0.35 4 -3.4 128.04 71.75 43.96
    23 0.35 5 -1.8 286.80 179.69 103.27
    24 0.35 6 -2.2 268.54 162.92 98.42
    25 0.35 7 -2.6 230.74 138.54 87.47
    下载: 导出CSV
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出版历程
  • 收稿日期:  2014-07-18
  • 修回日期:  2015-04-30
  • 刊出日期:  2016-01-25

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