爆炸荷载下不对称Y型裂纹扩展规律的试验研究

doi:10.16285/j.rsm.2017.08.003

›› 2017, Vol. 38 ›› Issue (8): 2175-2181.doi: 10.16285/j.rsm.2017.08.003

爆炸荷载下不对称Y型裂纹扩展规律的试验研究

杨仁树¹，苏洪¹，龚悦²，陈程¹

1.中国矿业大学（北京）力学与建筑工程学院，北京 100083；2. 安徽理工大学化学与工程学院，安徽淮南 232001

收稿日期:2016-11-23 出版日期:2017-08-11 发布日期:2018-06-05
通讯作者: 苏洪，男，1987年生，博士，主要从事爆破技术与应用方面的研究工作。E-mail：suhonggy2016@163.com E-mail:rengshuy@163.com
作者简介:杨仁树，男，1963年生，博士，教授，博士生导师，主要从事岩土工程方面的教学与研究工作。
基金资助:
国家自然科学基金面上项目（No. 51274203，No. 51374210）；高等学校学科创新引智计划资助（No. B14006）。

Study on the regularity of asymmetric Y-shaped cracks propagation under blast loading

YANG Ren-shu¹, SU Hong¹, GONG Yue², CHEN Cheng¹

1. School of Mechanics and Civil Engineering, China University of Ming and Technology, Beijing 100083, China; 2. School of Chemical Engineering, Anhui University of Science and Technology, Huainan, Anhui, 232001, China

Received:2016-11-23 Online:2017-08-11 Published:2018-06-05
Supported by:
This work was supported by the General Program of National Natural Science Foundation of China (51274203, 51374210) and the Program of Introducing Talents of Discipline to Universities (B14006).

摘要/Abstract

摘要： 采用爆炸加载透射式动焦散测试系统，研究了爆炸荷载下不对称Y型裂纹扩展的动态行为。试验结果表明：爆炸荷载下两相向运动裂纹在相遇前裂纹尖端奇异场相互影响，焦散斑扭曲，裂纹尖端应力场改变，相遇前沿偏离水平方向相向扩展，偏离角度逐渐增大，相遇后偏离角度逐渐减小并朝对方已有裂纹方向扩展；两分支裂纹相交于主裂纹，翼裂纹主要从与入射应力波夹角较小和长度较长的分支裂纹起裂，沿周向最大拉应力垂直方向扩展；入射应力波夹角较小和长度较长的分支裂纹对入射应力波夹角较大和长度较短的分支裂纹扩展及其尖端应力强度因子有抑制作用；分支裂纹尖端动态应力强度因子均值随分支裂纹与应力波夹角增大而减小，分支翼裂纹扩展速度呈现振荡式变化规律。研究结果为实际工程中分析相互贯通裂纹的扩展规律提供了可靠依据。

关键词: Y型裂纹, 爆炸荷载, 动焦散, 裂纹扩展, 动态应力强度因子

Abstract: Using a dynamic caustics blast loading system, we studied dynamic behavior of asymmetric Y-shaped cracks propagation under blasting loading. It was found that before two opposite moving cracks encountering, their tip singular fields affected each other, the shape of caustics spots distorted and stress fields of the crack tip changed. Moreover, two moving cracks propagated along the deviating horizontal direction, and the deviation angle gradually increased. However, after two opposite moving cracks encountering, the deviation angle gradually decreased, and two moving cracks propagated along the direction of the existing crack. It can be seen that two branched cracks intersected at the main crack, and the wing crack easily initiated from the branched crack with a smaller incident angle of stress wave and a longer length, and propagated along the vertical direction of the maximum tensile stress. However, this kind of branched crack may inhibit the propagation and the stress intensity factor of the branched crack with a larger incident angle and a shorter length. The average values of dynamic stress intensity factor of the branched crack decreased with the increase of the incident angle of stress wave. In addition, the propagation velocity of the branched wing crack presented oscillating change law. Therefore, the results provide a reliable basis for the analysis of crack propagation in practical engineering.

Key words: Y-shaped cracks, blasting load, dynamic caustics, crack propagation, dynamic stress intensity factor

中图分类号:

TU 452

杨仁树，苏洪，龚悦，陈程，. 爆炸荷载下不对称Y型裂纹扩展规律的试验研究[J]. , 2017, 38(8): 2175-2181.

YANG Ren-shu, SU Hong, GONG Yue, CHEN Cheng，. Study on the regularity of asymmetric Y-shaped cracks propagation under blast loading[J]. , 2017, 38(8): 2175-2181.

参考文献

相关文章 15

[1]	潘锐, 程桦, 王雷, 王凤云, 蔡毅, 曹广勇, 张朋, 张皓杰, . 巷道浅层破碎围岩锚注加固承载特性试验研究[J]. 岩土力学, 2020, 41(6): 1887-1898.
[2]	艾迪昊, 李成武, 赵越超, 李光耀, . 煤体静载破坏微震、电磁辐射及裂纹扩展特征研究[J]. 岩土力学, 2020, 41(6): 2043-2051.
[3]	张国凯, 李海波, 王明洋, 李晓锋, . 基于声学测试和摄像技术的单裂隙岩石裂纹扩展特征研究[J]. 岩土力学, 2019, 40(S1): 63-72.
[4]	张传庆, 刘振江, 张春生, 周辉, 高阳, 侯靖, . 隐晶质玄武岩破裂演化及破坏特征试验研究[J]. 岩土力学, 2019, 40(7): 2487-2496.
[5]	王海军, 郁舒阳, 任然, 汤雷, 李欣昀, 贾宇, . 基于3D-ILC含内裂纹孔口脆性固体断裂特性试验[J]. 岩土力学, 2019, 40(6): 2200-2212.
[6]	杨石扣, 张继勋, 任旭华, . 基于改进数值流形法的接触裂纹问题研究[J]. 岩土力学, 2019, 40(5): 2016-2021.
[7]	张波, 李垚, 杨学英, 朱飘扬, 朱春帝, 刘子豪, 刘文杰, 罗志恒, . 一种用于水压致裂试验的水压供给装置研制及应用[J]. 岩土力学, 2019, 40(5): 2022-2028.
[8]	丛怡, 丛宇, 张黎明, 贾乐鑫, 王在泉, . 大理岩加、卸荷破坏过程的三维颗粒流模拟[J]. 岩土力学, 2019, 40(3): 1179-1186.
[9]	李铮, 郭德平, 周小平, 王允腾, . 模拟岩石中裂纹扩展连接的近场动力学方法[J]. 岩土力学, 2019, 40(12): 4711-4721.
[10]	张珂, 王海军, 任然, 汤雷, 郁舒阳, 刘鑫娜, 顾浩, . 基于3D-ILC球体45º三维双内裂纹复合断裂研究[J]. 岩土力学, 2019, 40(12): 4731-4739.
[11]	马鹏飞, 李树忱, 周慧颖, 赵世森. 岩石材料裂纹扩展的改进近场动力学方法模拟[J]. 岩土力学, 2019, 40(10): 4111-4119.
[12]	王桂林, 梁再勇, 张亮, 孙帆, . Z型裂隙对砂岩强度和破裂行为影响机制研究[J]. 岩土力学, 2018, 39(S2): 389-397.
[13]	伍天华, 周喻, 王莉, 孙金海, 赵欢, 孙铮, . 单轴压缩条件下岩石孔-隙相互作用机制细观研究[J]. 岩土力学, 2018, 39(S2): 463-472.
[14]	杨石扣，张继勋，任旭华,. 基于数值流形法的三维裂纹扩展研究[J]. , 2018, 39(S1): 488-494.
[15]	徐文彬，曹培旺，程世康，. 不同偏置裂纹充填体断裂特性试验[J]. , 2018, 39(5): 1643-1652.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

爆炸荷载下不对称Y型裂纹扩展规律的试验研究

Study on the regularity of asymmetric Y-shaped cracks propagation under blast loading

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0