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Rock Mechanics and Rock Engineering

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28.08.2018 | Original Paper

Mechanical Behavior and Damage Constitutive Model of Rock Subjected to Water-Weakening Effect and Uniaxial Loading

verfasst von: Kang Bian, Jian Liu, Wei Zhang, Xiaoqing Zheng, Shaohu Ni, Zhenping Liu

Erschienen in: Rock Mechanics and Rock Engineering | Ausgabe 1/2019

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Abstract

Water-weakening effect is one of the most important causes triggering large deformation and failure of soft-rock engineering; however, few studies have paid attention to damage evolution and constitutive relationship of rock in water-weakening process. In this paper, laboratory tests are first carried out to estimate the evolution of mechanical properties along with changes of immersion time for shale samples. Then with the aid of X-ray diffraction and scanning electron microscope, mechanism of parameter degradation for shale under immersion conditions is investigated from the microscopic perspective. Based on the generalized strain equivalent principle and the theory of statistical microscopic damage mechanics, a damage constitutive model of rock subjected to water-weakening effect and uniaxial loading is established by considering the influence of void-compression stage, and the proposed model is verified to be in good agreement with the experiment results. This paper provides an effective approach to analyze the constitutive relationship of rock subjected to water-weakening effect and uniaxial loading.

Vorheriger Artikel Examination of Mean Stress Calculation Approaches in Rock Mechanics

Nächster Artikel Modelling Shear Behaviour of Joint Based on Joint Surface Degradation During Shearing

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Titel: Mechanical Behavior and Damage Constitutive Model of Rock Subjected to Water-Weakening Effect and Uniaxial Loading
verfasst von: Kang Bian
Jian Liu
Wei Zhang
Xiaoqing Zheng
Shaohu Ni
Zhenping Liu
Publikationsdatum: 28.08.2018
Verlag: Springer Vienna
Erschienen in: Rock Mechanics and Rock Engineering / Ausgabe 1/2019
Print ISSN: 0723-2632
Elektronische ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-018-1580-4

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