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Experimental study on the influence of loading rate on the directional propagation law of rock mode-I cracks by Weiyao Guo; Lexin Chen; Liming Yin; Lei Zhang; Dan Lu; Biao Kong; Han Fei is a Engineering article available to read on EtoBox.

What is Experimental study on the influence of loading rate on the directional propagation law of rock mode-I cracks about?

To investigate the influence of the loading rate on the propagation behavior of rock mode-I cracks, a simple device for simulating rock-crack directional propagation was developed. Subsequently, loading tests were performed for rock mode-I crack propagation at different loading rates. The entire crack propagation process was monitored by applying acoustic emission (AE) and digital image correlation (DIC), and the influence of the loading rate on the mode-I crack propagation mechanism was investigated. The results showed that the peak load increased as the loading rate increased; however, the crack initiation angle and crack initiation time both tended to decrease. According to the evolution law of the deformation field, the crack propagation process can be divided into four stages: local strain band initiation, local strain band development, main control crack initiation, and main control crack coalescence. The deformation separation degree of the main control crack increased with an increase in the loading rate. The evolution process of AE can be divided into four stages: quiet, slowly increasing, booming, and decreasing periods. When the loading rate increased, the intensity of t

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Author

Weiyao Guo; Lexin Chen; Liming Yin; Lei Zhang; Dan Lu; Biao Kong; Han Fei

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)