Fracture behavior in blasting under different static stresses and high stress unloading

Author:

Huang Chen12ORCID,Zhang Zong‐Xian2,Aladejare Adeyemi2,Chen Zhan13,Ding Chenxi4ORCID,Yang Liyun1

Affiliation:

1. School of Mechanics and Civil Engineering China University of Mining and Technology Beijing China

2. School of Mining University of Oulu Oulu Finland

3. China Southwest Geotechnical Investigation & Design Institute Co., Ltd. Chengdu China

4. School of Civil and Resource Engineering University of Science and Technology Beijing Beijing China

Abstract

AbstractIn this paper, the effects of static stresses on the blast‐induced crack in polymethyl methacrylate specimens with an empty hole were investigated by caustic system. The propagation behavior and re‐initiation process of blast‐induced crack under initial static stress and high stress unloading were investigated. The results show that when the direction of the empty hole is perpendicular to the static stress, the static stress reduces the length of the main crack. However, when the static stress is very high, the length of main cracks does not decrease. In addition, the static stress reduces the crack velocity and dynamic stress intensity factor (DSIF) and suppresses the increase of DSIFs and crack velocity due to reflected wave. The crack arrested under high stress unloading propagates again in the later stage. Moreover, the duration of high stress unloading lasts approximately 1 ms.

Funder

Fundamental Research Funds for Central Universities of the Central South University

National Natural Science Foundation of China

Publisher

Wiley

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Research on directional blasting of multiple slit charge;Engineering Fracture Mechanics;2024-09

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