单边偏置裂纹相互作用的实验研究

摘要
图/表
参考文献(22)
相关文章 (9)

全文: PDF (2220 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为研究脆性介质中裂纹相互作用对裂纹扩展形态的影响，以有机玻璃（PMMA）为相似材料，采用动态焦散线实验方法开展了三点弯冲击动力学实验研究。结果表明：冲击荷载条件下，裂纹间相互作用影响裂纹起裂时间、裂纹尖端应力场以及裂纹偏转方向。裂纹相互作用使得裂纹起裂时应力强度因子KId降低，起裂所需能量累积时间缩短；裂纹扩展初始阶段，单偏置裂纹尖端应力场剪应力分量为正，应力强度因子KIId大于0，单边偏置平行双裂纹相同位置处裂纹尖端应力场剪应力分量为负，KIId小于0；裂纹距离中心位置10mm的情况下，单偏置裂纹起裂后向内侧偏转，单边偏置平行双裂纹相同位置处裂纹向外侧偏转。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：单边偏置裂纹, 裂纹相互作用, 动态焦散线, 裂纹偏转

Abstract：Here, in order to study effects of cracks interaction in brittle medium on crack growth morphology, the dynamic caustics method was used to conduct 3-point bend impact dynamic tests taking PMMA as a similar material.The results showed that under the condition of impact load, cracks interaction affects crack initiation time, crack tip stress field and crack deflection direction; cracks interaction causes decreases in stress intensity factor KdI during crack initiation and time required for crack initiation energy accumulation; in initial stage of crack propagation, shear stress component of single-offset crack tip stress field is positive and stress intensity factor KdII is larger than zero, while shear stress component of crack tip stress field at the same position of unilateral offset parallel double cracks is negative and KdII is less than zero; when crack position is 10 mm away from center position, a single-offset crack deflects to inside after its initiation, a crack at the same positon of unilateral offset parallel double cracks deflects to outside.

Key words： unilateral offset crack crack interaction dynamic caustics crack deflection

收稿日期: 2018-03-23 出版日期: 2019-08-28

引用本文:

杨仁树1,2，陈程1，付晓强1，林海1，丁晨曦1. 单边偏置裂纹相互作用的实验研究[J]. 振动与冲击, 2019, 38(17): 121-127.
YANG Ren-shu1,2 CHEN Cheng1 FU Xiaoqiang1 LIN Hai1 DING Chenxi1. Tests for interaction of unilateral offset cracks. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(17): 121-127.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I17/121

[1] 王炳军, 肖洪天, 岳中琦. 半无限横观各向同性介质中多裂纹相互作用分析[J]. 岩土力学, 2012, 33(8): 2527-2535.
WANG Bingjun, XIAO Hongtian, YUE Zhongqi. Interaction between two rectangular cracks in a transversely isotropic medium of semi-infinite extent[J]. Rock and Soil Mechanics, 2012, 33(8): 2527-2535.
[2] 席婧仪, 陈忠辉, 张伟. 单轴拉伸作用下不等长裂纹相互影响的断裂力学分析[J]. 岩石力学与工程学报, 2014, 33(A02): 3625-3630.
XI Jingyi, CHEN Zhonghui, ZHANG Wei. Fracture mechanics analysis of unequal cracks interaction under uniaxial tension[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(A02): 3625-3630.
[3] 李银平, 王元汉, 肖四喜. 岩石类材料中压剪裂纹的相互作用分析[J]. 岩石力学与工程学报, 2003, 22(4): 552-555.
LI Yingping, Wang Yuanhan, XIAO Sixi. Interaction of frictional cracks in rock-like materials[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(4): 552-555.
[4] 杨仁树, 左进京, 岳中文, 等. 爆炸载荷作用下相向裂纹扩展行为的实验研究[J]. 煤炭学报, 2017, 42(05): 1093-1098.
YANG Renshu, ZUO Jinjing, YUE Zhongwen, et al. Experimental study on opposite cracks propagation behavior under blast loading[J]. Journal of China Coal Society, 2017, 42(05): 1093-1098.
[5] 杨仁树, 许鹏, 岳中文, 等. 圆孔缺陷与 I 型运动裂纹相互作用的试验研究[J]. 岩土力学, 2016, 37(6): 1597-1602.
YANG Renshu, XU Peng, YUE Zhongwen, et al. Laboratory study of interaction between a circular hole defect and mode I moving crack[J]. Rock and Soil Mechanics, 2016, 37(6): 1597-1602.
[6] 杨仁树, 丁晨曦, 杨立云, 等. 含异侧偏置裂纹试件的冲击断裂试验[J]. 科学技术与工程, 2017, 17(10): 1-5.
YANG Renshu, DING Chenxi, YANG Liyun, et al. Impact fracture tests for specimens containing bilateral off-center cracks[J]. Science Technology and Engineering, 2017, 17(10): 1-5.
[7] 高桂云, 周洁, 励争. 脆性材料裂纹与损伤相互作用的试验研究[J]. 岩石力学与工程学报, 2017, 36(11): 2650-2661.
GAO Guiyun, ZHOU Jie, LI Zheng. Experimental study on the interaction of crack and defects of brittle materials under dynamic loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(11): 2650-2661.
[8] 王雁冰, 杨仁树, 丁晨曦, 等. 双孔爆炸应力波作用下缺陷介质裂纹扩展的动焦散试验[J]. 煤炭学报, 2016, 41(07): 1755-1761.
WANG Yanbing, YANG Renshu, DING Chenxi, et al. Dynamic caustics experiment on crack propagation of defective medium under the effect of explosive stress waves of double holes[J]. Journal of China Coal Society, 2016, 41(07): 1755-1761.
[9] Yao X F, Xu W, Xu M Q, et al. Experimental study of dynamic fracture behavior of PMMA with overlapping offset-parallel cracks[J]. Polymer testing, 2003, 22(6): 663-670.
[10] 岳中文, 宋耀, 邱鹏, 等. 冲击载荷下双预置裂纹三点弯曲梁动态断裂实验[J]. 振动与冲击, 2017, 36(4): 151-156.
YUE Zhongwen, SONG Yao, QIU Peng, et al. A dynamic fracture experiment of a three-point-bend beam containing double pre-existing cracks under impact load[J]. Journal of Vibration and Shock, 2017, 36(4): 151-156.
[11] 岳中文, 宋耀, 王煦, 等. 不同倾角预制裂纹缺陷与运动裂纹的相互作用[J]. 爆炸与冲击, 2017, 37(1): 162-168.
YUE Zhongwen, SONG Yao, WANG Xu, et al. Interaction between a pre-existing crack defect with different angles and a running crack[J]. Explosion and Shock Waves, 2017, 37(1): 162-168.
[12] 杨立云, 张勇进, 孙金超, 等. 偏置裂纹对含双裂纹 PMMA 试件动态断裂影响效应研究[J]. 矿业科学学报, 2017, 2(4): 330-335.
YANG Liyun, ZHANG Yongjin, SUN Jinchao, et al. The effect of offset distance on dynamic fracture behavior of PMMA with double cracks[J]. Journal of Mining Science and Technology, 2017, 2(4): 330-335.
[13] 李清, 张迪, 杨阳, 等. 含单侧预制裂纹梁的冲击动态断裂过程试验研究[J]. 振动与冲击, 2015, 34(4): 205-210.
LI Qing, ZHANG Di, YANG Yang, et al. Dynamic fracture tests for a beam containing unilateral pre-existing cracks under impact loads[J]. Journal of Vibration and Shock, 2015, 34(4): 205-210.
[14] 卿海, 杨卫, 吕坚. 多条表面裂纹相互作用的应力分析[J]. 工程力学, 2009, 26(1): 1-7.
QING Hai, YANG Wei, LU Jian. Stress analysis of multiple surface cracks with interactions[J]. Engineering Mechanics, 2009, 26(1): 1-7.
[15] 黄明利, 唐春安, 梁正召. 岩石裂纹相互作用的应力场分析[J]. 东北大学学报: 自然科学版, 2001, 22(4): 446-449.
HUANG Mingli, TANG Chunan, LIANG Zhengzhao. Stress field analysis of interaction of rock cracks[J]. Journal of Northeastern University (Natural Science), 2001, 22(4): 446-449.
[16] 朱帝杰, 陈忠辉, 席婧仪, 等. 岩石平行偏置裂纹相互作用规律分析[J]. 岩土工程学报, 2017, 39(2): 235-243.
ZHU Dijie, CHEN Zhonghui, XI Jingyi, et al. Interaction between offset parallel cracks in rock[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(2): 235-243.
[17] Richard H A, Fulland M, Sander M. Theoretical crack path prediction[J]. Fatigue & fracture of engineering materials & structures, 2005, 28(1-2): 3-12.
[18] Kalthoff J F. On the propagation direction of bifurcated cracks[C]//Proceedings of an international conference on Dynamic Crack Propagation. Springer Netherlands, 1973: 449-458.
[19] Kalthoff J F. The shadow optical method of caustics[M]//Static and dynamic photoelasticity and caustics. Springer Vienna, 1987: 407-522.
[20] Theocaris P S, Papadopoulos G. Fracture Mechanics[M]//Mixed-mode dynamic stress intensity factors from caustics. ASTM STP, 1983: 320-337.
[21] Papadopoulos G A. Fracture Mechanics[M]//The experimental method of caustics and the Det.-Criterion of fracture. Springer-Verlag, 1993.
[22] YUE Z W, YANG L Y, WANG Y B. Experimental study of crack propagation in polymethyl methacrylate material with double holes under the directional controlled blasting[J]. Fatigue & Fracture of Engineering Materials & Structures, 2013, 36(8): 827-833.