Transversely Anisotropic Damage Characteristics of Loaded Rock under Freeze-thaw Cycles

5th Annual International Workshop on Materials Science and Engineering

Liu, Xiangdong^1 ; Zhang, Huimei^1

Department of Mechanics, Xi'An University of Science and Technology, Xi'an, China^1

关键词: Damage constitutive model;    Damage evolution equation;    Deformation and strength;    Engineering problems;    Mechanical behavior;    Prevention and controls;    Structural surfaces;    Transversely isotropic;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/585/1/012062/pdf
DOI  :  10.1088/1757-899X/585/1/012062

来源: IOP

【 摘 要 】

Flake metamorphic rocks and sedimentary rocks tend to show obvious transversely isotropic mechanical properties in deformation and strength because of the existence of weak structural surface or soft-hard interlayer structure. The rock in cold area is affected by load and freeze-thaw cycles, and the prevention and control of freeze-thaw disaster has become an urgent problem to be solved in the construction of cold area. Based on the strength of Rock Micro Element subjecting to Weibull random distribution and the macroscopic statistical damage model of rock, this paper used the transversely isotropic elastomer model to describe the damage evolution equation of freeze-thaw rocks in the whole process of the load deformation, and established the corresponding damage constitutive model. The results showed that this model more accurately describes the effect of freeze-thaw cycles on rock mechanical behavior, and had positive theoretical and practical significance for solving engineering problems in complex rock body.