Connecting modes of two cracks under impact loads

ZHOU Qin; ZHU Zheming; WANG Xiong; DONG Yuqing; ZHOU Lei

doi:10.11883/bzycj-2018-0247

Volume 39 Issue 11

Nov. 2019

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ZHOU Qin, ZHU Zheming, WANG Xiong, DONG Yuqing, ZHOU Lei. Connecting modes of two cracks under impact loads[J]. Explosion And Shock Waves, 2019, 39(11): 113201. doi: 10.11883/bzycj-2018-0247

Citation:

ZHOU Qin, ZHU Zheming, WANG Xiong, DONG Yuqing, ZHOU Lei. Connecting modes of two cracks under impact loads[J]. Explosion And Shock Waves, 2019, 39(11): 113201. doi: 10.11883/bzycj-2018-0247

ZHOU Qin, ZHU Zheming, WANG Xiong, DONG Yuqing, ZHOU Lei. Connecting modes of two cracks under impact loads[J]. Explosion And Shock Waves, 2019, 39(11): 113201. doi: 10.11883/bzycj-2018-0247

Citation:

ZHOU Qin, ZHU Zheming, WANG Xiong, DONG Yuqing, ZHOU Lei. Connecting modes of two cracks under impact loads[J]. Explosion And Shock Waves, 2019, 39(11): 113201. doi: 10.11883/bzycj-2018-0247

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Connecting modes of two cracks under impact loads

doi: 10.11883/bzycj-2018-0247

ZHOU Qin^{1, 2
,},
ZHU Zheming^{1, 2
,
,},
WANG Xiong^{1, 2},
DONG Yuqing^{1, 2},
ZHOU Lei^{1, 2}

1.
Key Laboratory of Deep Underground and Science and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, Sichuan, China
2.
College of Architecture and Environment, Sichuan University, Chengdu 610065, Sichuan, China

Received Date: 2018-07-10
Rev Recd Date: 2018-11-09
Publish Date: 2019-11-01

Abstract

Abstract

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 K_I decrease with the increase of the distance between the two cracks while K_II is the opposite.
- double cracks,
- stress intensity factor,
- finite element code,
- crack propagation behavior

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References(33)

References

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