Connecting modes of two cracks under impact loads

被引：0
作者：
Zhou Q. [1 ,2 ]
Zhu Z. [1 ,2 ]
Wang X. [1 ,2 ]
Dong Y. [1 ,2 ]
Zhou L. [1 ,2 ]
机构：
[1] Key Laboratory of Deep Underground and Science and Engineering, Ministry of Education, Sichuan University, Chengdu, 610065, Sichuan
[2] College of Architecture and Environment, Sichuan University, Chengdu, 610065, Sichuan
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2019年 / 39卷 / 11期
关键词：
Crack propagation behavior; Double cracks; Finite element code; Stress intensity factor;
D O I：
10.11883/bzycj-2018-0247
中图分类号：
学科分类号：
摘要：
A multitude of flaws always exists in brittle material and the influence will be exerted on by other flaws when one flaw is propagating. To investigate the propagation, coalition behavior and stress intensity factors of two cracks in brittle materials under impact loading, Polymethyl methacrylate (PMMA) was selected to manufacture the double cracked specimens. By using the medium-low speed impact system, impact experiments were conducted, and the crack tip SIFs were calculated by using finite element code ABAQUS. The finite difference code AUTODYN was used in the simulation crack propagation behavior, and the simulation results were compared with the test results. The results of experiment and simulation show that the simulation results generally agree with the experimental results in crack propagation paths; the crack propagation behavior varies with the change of the distance between the two cracks; the effect between the two cracks decreases with the increase of the distance between the two cracks; the stress intensity factors KI decrease with the increase of the distance between the two cracks while KII is the opposite. © 2019, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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