Interaction between a pre-existing crack defect with different angles and a running crack

Yue Zhongwen; Song Yao; Wang Xu; Li Mingyang; Li Minglin

doi:10.11883/1001-1455(2017)01-0162-07

Volume 37 Issue 1

Jan. 2017

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Yue Zhongwen, Song Yao, Wang Xu, Li Mingyang, Li Minglin. Interaction between a pre-existing crack defect with different angles and a running crack[J]. Explosion And Shock Waves, 2017, 37(1): 162-168. doi: 10.11883/1001-1455(2017)01-0162-07

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Interaction between a pre-existing crack defect with different angles and a running crack

doi: 10.11883/1001-1455(2017)01-0162-07

School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China

Received Date: 2015-01-21
Rev Recd Date: 2016-07-18
Publish Date: 2017-01-25

Abstract

Abstract

Using the digital-laser dynamic caustic system, the impact tests of the three-point bending beam were performed to investigate the interaction mechanism between a pre-existing crack defect with different angles and a running crack. The experimental results show that the secondary cracks were initiated at the tips of the middle pre-existing cracks under impact loading; the secondary cracks at the tip of the pre-existing cracks would not initiate until they have accumulated more energy in 0-10 μs; both the peak value of the dynamic stress intensity factor of the main cracks and the secondary cracks would rise with the increase of the pre-existing cracks angle in the central part of the specimen.
- solid mechanics,
- dynamic stress intensity factor,
- pre-existing crack defect,
- dynamic caustics,
- impact loading,
- three-point bending beam

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References

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