Tests for interaction between static crack and dynamic one under explosion loading

被引：0
|
作者：
Yang R. [1 ,2 ]
Zuo J. [1 ]
Xiao C. [1 ]
Shi G. [1 ]
机构：
[1] School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing
[2] State Key Lab for Geo-mechanics and Deep Underground Engineering, Beijing
来源：
Zuo, Jinjing | 2018年 / Chinese Vibration Engineering Society卷 / 37期
关键词：
Blast loading; Crack growth velocity; Dynamic caustic; Dynamic crack; Dynamic stress intensity factor;
D O I：
10.13465/j.cnki.jvs.2018.13.010
中图分类号：
学科分类号：
摘要：
Adopting a digital laser dynamic caustic test system, the interaction between dynamic crack and static one under explosion loading was studied. The results showed that under explosion loading, dynamic crack and static one link up each other, the average propagation length of wing crack decreases with increase in the distance L between the tip of dynamic crack and static one; the wing crack can't start crack when L reaches a certain value; dynamic crack propagation velocity and the stress intensity factor decrease when dynamic crack is close to static one; due to the effects of dynamic crack tip stress field, obvious caustic speckle appears at two ends of static crack; with increase in L, wing crack extension speed and the dynamic stress intensity factor gradually decrease; wing crack's dynamic characteristics have an obvious diversity with variation of L; with increase in L, the peak values of wing crack propagation speed and dynamic stress intensity factor decrease. © 2018, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：65 / 70and84
页数：7019
相关论文
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