Influence of internal friction angle on damage constitutive model of freeze-thaw rock

Authors

YUAN Chao, College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
ZHANG Huimei, Department of Mechanics, Xi'an University of Science and Technology, Xi'an 710054, China
MENG Xiangzhen, College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
YANG Gengshe, College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
WU Luyuan, State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China

Abstract

Based on Weibull random distribution and damage mechanics theory, starting from the characteristics of rock deformation process, the Drucker-Prager criterion was used to establish a damage constitutive model that can reflect the characteristics of rock various deformation stages. Through the conventional triaxial compression test of frozen-thawed sandstone, the Mohr stress circle was used to obtain the cohesion and internal friction angle of the sandstone under different freeze-thaw cycles. The model theoretical curve and the test curve of freeze-thaw sandstone were compared to verify the model rationality. By varying the internal friction angle, whether the friction angle has an effect on the model was analyzed. The results showed that the theoretical curve obtained by the Drucker-Prager criterion agreed well with the experimental curve, which verified the rationality of the model. The internal friction angle had big influence on the distribution variable and was linear, but had no effect on the damage constitutive model or had little effect. The research results have a good reference value for the establishment of rock constitutive relations.

Keywords

Drucker-Prager criterion, damage constitutive model, cohesion, internal friction angle, freeze-thaw test

DOI

10.3969/j.issn.1001-1986.2019.04.021

Recommended Citation

YUAN Chao, ZHANG Huimei, MENG Xiangzhen, et al. (2019) "Influence of internal friction angle on damage constitutive model of freeze-thaw rock," Coal Geology & Exploration: Vol. 47: Iss. 4, Article 22.
DOI: 10.3969/j.issn.1001-1986.2019.04.021
Available at: https://cge.researchcommons.org/journal/vol47/iss4/22

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