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Get Free AccessThe semi-circular bend (SCB) specimen is widely used to measure fracture toughness of brittle materials such as rock. In this work, the stress field, fracture process zone (FPZ), and crack propagation velocity of SCB specimen are analyzed during the fracture process of rock specimens. The FPZ of specimen is obtained by experimental and numerical methods under a three-point bend test. The stress concentration zones of specimen present a heart shape at peak load points. FPZ forms before macro fracture occurs. The macro fracture form inside FPZ in a post-peak region of a load–displacement curve. The crack propagation process of specimen include two stages, namely the rapid crack initial development stage, and the final crack splitting stage. The maximum crack propagation velocity of specimen is about 267 m/s, and the average crack propagation velocity is about 111 m/s.
Peng Xiao, Diyuan Li, Guoyan Zhao, Meng Liu (2021). Experimental and Numerical Analysis of Mode I Fracture Process of Rock by Semi-Circular Bend Specimen. , 9(15), DOI: https://doi.org/10.3390/math9151769.
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Type
Article
Year
2021
Authors
4
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.3390/math9151769
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