Tantan Zhu1, Da Huang2,3,*, Jianxun Chen1, Yanbin Luo1, Longfei Xu1
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 79-97, 2021, DOI:10.32604/cmes.2021.014808
Abstract Excavation and earth surface processes (e.g., river incision) always induce the unloading of stress, which can
cause the failure of rocks. To study the shear mechanical behavior of a rock sample under unloading normal
stress conditions, a new stress path for direct shear tests was proposed to model the unloading of stress caused
by excavation and other processes. The effects of the initial stresses (i.e., the normal stress and shear stress before
unloading) on the shear behavior and energy conversion were investigated using laboratory tests and numerical
simulations. The shear strength of a rock under constant stress or under unloading… More >
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