Experimental Study on Damage Behavior of Rock in Compression–Tension Cycle Test Using 3D Digital Image Correlation
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Understanding the mechanical properties of rock is essential for rock engineering, and uniaxial compressive strength (UCS) is the most widely used index for rock properties. Many scholars have investigated rock behaviors in the uniaxial compression condition under different stress paths, such as monotonous loading (Pepe et al. 2017; Taheri and Munoz 2016; Xue 2015), cyclic loading (Meng et al. 2018; Munoz and Taheri 2017; Song et al. 2016), and constant loading (creep or relaxation) (Hashiba and Fukui 2016; Okubo et al. 1991, 2010). Furthermore, tension properties are as important as compression properties to estimate the stability of rock structures. Although a direct tension test is difficult to conduct, some research results have been reported. Okubo and Fukui (1996) obtained complete stress–strain curves of different types of rocks based on a new control method. Yang et al. (2015) investigated the damage mechanisms of granite under uniaxial tension using the digital...
KeywordsCompression–tension cycle test Crack propagation Strain localization Damage behavior Three-dimensional digital image correlation
The authors would like to thank the National Natural Science Foundation of China (51434003), Basic and Frontier Research Projects of Chongqing (cstc2016jcyjA0117), and Fundamental Research Funds for the Central Universities (106112017CDJQJ248825).
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