考虑应力三轴度影响的30CrMnSiNi2A钢韧性断裂研究

余万千 郁锐 崔世堂

余万千, 郁锐, 崔世堂. 考虑应力三轴度影响的30CrMnSiNi2A钢韧性断裂研究[J]. 爆炸与冲击, 2021, 41(3): 031404. doi: 10.11883/bzycj-2020-0334
引用本文: 余万千, 郁锐, 崔世堂. 考虑应力三轴度影响的30CrMnSiNi2A钢韧性断裂研究[J]. 爆炸与冲击, 2021, 41(3): 031404. doi: 10.11883/bzycj-2020-0334
YU Wanqian, YU Rui, CUI Shitang. On ductile fracture of 30CrMnSiNi2A steel considering effects of stress triaxiality[J]. Explosion And Shock Waves, 2021, 41(3): 031404. doi: 10.11883/bzycj-2020-0334
Citation: YU Wanqian, YU Rui, CUI Shitang. On ductile fracture of 30CrMnSiNi2A steel considering effects of stress triaxiality[J]. Explosion And Shock Waves, 2021, 41(3): 031404. doi: 10.11883/bzycj-2020-0334

考虑应力三轴度影响的30CrMnSiNi2A钢韧性断裂研究

doi: 10.11883/bzycj-2020-0334
详细信息
    作者简介:

    余万千(1994- ),男,硕士,助理工程师,hsywq812907@163.com

    通讯作者:

    郁 锐(1981- ),男,硕士,教授级高级工程师,1715516202@qq.com

  • 中图分类号: O347.3

On ductile fracture of 30CrMnSiNi2A steel considering effects of stress triaxiality

  • 摘要: 30CrMnSiNi2A钢是一种在军工领域应用广泛的低合金高强度钢。针对结构完整性的评估问题,采用试验和数值计算结合的方法研究了30CrMnSiNi2A钢的韧性断裂特性。对光滑圆棒试件在不同温度下进行准静态和动态拉伸试验,并通过有限元迭代方法标定了材料的Johnson-Cook动态本构模型参数,分析了温度和应变率对30CrMnSiNi2A钢断裂行为的影响。开展了缺口圆棒拉伸、缺口平板剪切和圆柱压缩试验,计算了各试件对应的平均应力三轴度和断裂应变,给出了应力三轴度在−1/3~1.5区间内的断裂应变变化曲线,分别确定了Johnson-Cook和Bao-Wierzbicki失效模型参数。研究表明,30CrMnSiNi2A钢的断裂应变与应力状态密切相关,且在不同的应力三轴度区间内曲线单调性差异较大,Bao-Wierzbicki失效模型较好地描述了这种钢在不同应力状态下的断裂特性。
  • 图  1  异形试件尺寸(单位:mm)

    Figure  1.  Dimensions of abnormal specimens (unit: mm)

    图  2  高温下的应力应变曲线

    Figure  2.  Stress-strain curves at different temperatures

    图  3  载荷-位移曲线模拟值与试验值比较

    Figure  3.  Comparison of load-displacement curves between simulation and test

    图  4  试件等效应力云图

    Figure  4.  Equivalent stress distribution of specimens

    图  5  细长圆柱载荷-位移曲线

    Figure  5.  Load-displacement curves of thin cylinders

    图  6  45°缺口平板载荷-位移曲线

    Figure  6.  Load-displacement curves of butterfly plates

    图  7  各试件应力三轴度-等效塑性应变曲线

    Figure  7.  Evolution of stress triaxiality for various specimens

    图  8  断裂应变-应力三轴度曲线拟合

    Figure  8.  Fracture strain stress triaxiality curve fitting

    图  9  试件的断裂形态

    Figure  9.  Fractured specimens

    表  1  异形试件

    Table  1.   Abnormal specimens

    序号试件载荷数量应力三轴度范围
    aR4缺口圆棒拉伸3[1/3,+∞]
    bR2缺口圆棒拉伸3[1/3,+∞]
    c45°缺口平板拉伸4[0,1/3]
    d0°缺口平板拉伸4[0,1/3]
    e短粗圆柱压缩3[−1/3,0]
    f细长圆柱压缩3[−1/3,0]
    下载: 导出CSV

    表  2  30CrMnSiNi2A钢的化学成分(质量分数,%)

    Table  2.   Composition of 30CrMnSiNi2A steel (mass fraction, %)

    CCrMnSiNiCuPS
    0.3001.0301.1601.0401.6800.0800.0140.020
    下载: 导出CSV

    表  3  光滑圆棒试件的屈服应力和断裂应变

    Table  3.   Yield strength and fracture strain of round bars

    序号温度/K应变率/s−1屈服应力/MPa断裂应变
    12980.0011 1630.753
    22981 0001 5910.775
    32982 0001 7160.881
    42984 0001 8830.962
    54730.0011 1150.827
    67730.001 6981.513
    下载: 导出CSV

    表  4  平均应力三轴度和断裂应变对应表

    Table  4.   A summary of average stress triaxiality and equivalent plastic fracture strain

    序号应力三轴度理论值平均应力三轴度断裂应变
    1−1/3−0.246 31.203
    2−1/3−0.097 20.437
    30 0.013 60.281
    41/6 0.086 60.455
    51/3 0.609 40.753
    60.652 1.069 00.382
    70.893 1.353 00.337
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-09-22
  • 修回日期:  2020-10-12
  • 网络出版日期:  2021-03-05
  • 刊出日期:  2021-03-10

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