动载下准脆性材料的泛形裂纹研究

明德涵 欧卓成 杨筱 段卓平 黄风雷

明德涵, 欧卓成, 杨筱, 段卓平, 黄风雷. 动载下准脆性材料的泛形裂纹研究[J]. 高压物理学报, 2019, 33(6): 064103. doi: 10.11858/gywlxb.20190754
引用本文: 明德涵, 欧卓成, 杨筱, 段卓平, 黄风雷. 动载下准脆性材料的泛形裂纹研究[J]. 高压物理学报, 2019, 33(6): 064103. doi: 10.11858/gywlxb.20190754
MING Dehan, OU Zhuocheng, YANG Xiao, DUAN Zhuoping, HUANG Fenglei. Ubiquitiform Crack of Quasi-Brittle Materials under Dynamic Loading[J]. Chinese Journal of High Pressure Physics, 2019, 33(6): 064103. doi: 10.11858/gywlxb.20190754
Citation: MING Dehan, OU Zhuocheng, YANG Xiao, DUAN Zhuoping, HUANG Fenglei. Ubiquitiform Crack of Quasi-Brittle Materials under Dynamic Loading[J]. Chinese Journal of High Pressure Physics, 2019, 33(6): 064103. doi: 10.11858/gywlxb.20190754

动载下准脆性材料的泛形裂纹研究

doi: 10.11858/gywlxb.20190754
基金项目: 国家自然科学基金(11772056)
详细信息
    作者简介:

    明德涵(1994-),男,硕士研究生,主要从事材料与结构冲击动力学研究. E-mail: bitmdh@163.com

    通讯作者:

    欧卓成(1961-),男,博士,教授,主要从事材料与结构冲击动力学研究. E-mail: zcou@bit.edu.cn

  • 中图分类号: O346.1

Ubiquitiform Crack of Quasi-Brittle Materials under Dynamic Loading

  • 摘要: 为建立动态拉伸载荷作用下准脆性材料裂纹扩展路径的泛形表征,提出了一种非均匀准脆性材料动态裂纹扩展的泛形模型,计算得到的泛形裂面复杂度与已有实验数据吻合较好。结果表明:动态拉伸载荷作用下的裂纹扩展路径是泛形的,其复杂度随加载应变率的增大而减小,并与材料动态拉伸承载能力的空间随机分布无关,且随Weibull分布形状参数m的增加而减小。研究结果为分析动态拉伸载荷作用下准脆性材料的裂纹扩展机理即泛形表征提供了依据。

     

  • 图  由Weibull分布表征的强度分布直方图

    Figure  1.  Histogram of the strength distribution characterized by Weibull distribution

    图  动态拉伸承载能力分布

    Figure  2.  Typical distribution of the dynamic tensile load-carrying capacity

    图  裂纹主向和偏转角

    Figure  3.  Crack primary direction and the deflection angle

    图  不同局部应变率下的裂纹轮廓线

    Figure  4.  Profile of the cracks under different local strain-rate

    图  计盒维数法计算泛形复杂度

    Figure  5.  Box-counting dimension method is used to compute the ubiquitiformal complexity

    图  局部应变率为103 s–1的泛形裂纹轮廓线

    Figure  6.  Profile of ubiquitiform cracks under the local strain rate of 103 s–1

    表  1  复杂度的数值计算结果

    Table  1.   Numerical results of the complexity C

    Strain rate/s−1C
    S1S2S3S4S5Avg.
    10–61.3811.3821.3791.3811.3831.381
    101.2151.2131.2101.2121.2081.212
    1021.1821.1821.1801.1781.1791.180
    1031.1271.1321.1341.1311.1421.133
    下载: 导出CSV

    表  2  不同形状参数下的泛形复杂度

    Table  2.   Ubiquitiform complexity under different shape parameters

    mCmC
    51.142 81.086
    61.126 91.057
    71.108101.033
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-04-03
  • 修回日期:  2019-04-24

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