Mechanical responses and failure characteristics of longmaxi formation shale under real-time high temperature and high-stress coupling

Zhao, Chengxing; Liu, Jianfeng; Lyu, Cheng; Chao-liang,; Xu, Ding; Ren, Yi

doi:10.1016/j.engfailanal.2023.107490

Cited by 5 publications

(3 citation statements)

References 71 publications

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“…It is noted that in the established works devoted to constitutive modeling, the friction coefficient μ* is conventionally considered constant for the sake of simplification (Molladavoodi, 2015;Qu et al, 2021;Ren et al, 2022;. Recently, however, a series of investigations have revealed that the friction coefficient is not a constant material parameter; rather, it is dependent on a number of factors, for example, ambient temperature, stress state, moisture, damage state, friction rate, and spatio-temporal scale (Ben-David & Fineberg, 2011;Putelat et al, 2011;Scholz, 2019;Zhang & Ma, 2021;C. X. Zhao, Liu, et al, 2023;Thom et al, 2023).…”

Section: Temperature-dependent Friction Lawmentioning

confidence: 99%

“…It is interesting to note that the critical damage d f also possess a thermal dependence due to the enhanced ductile plasticity mechanism under rising temperatures (Suo et al, 2020;C. X. Zhao, Liu, et al, 2023;Xu et al, 2023).…”

Section: Temperature-dependent Parametersmentioning

confidence: 99%

“…Considerable research has confirmed that the friction coefficient exhibits a rate-temperature-stress state dependence (Barbot, 2022;Blanpied et al, 1995;Pranger et al, 2022;Scholz, 2019;Zhang & Ma, 2021). Furthermore, temperature also has a significant influence on fracture toughness and cohesion (Guo et al, 2023;Jefferd et al, 2021;Suo et al, 2020;Xu et al, 2023;C. X. Zhao, Liu, et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Micro‐Thermomechanical Modeling of Rocks With Temperature‐Dependent Friction and Damage Laws

Lv,

Ren,

Lai

et al. 2024

JGR Solid Earth

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Temperature serves as a critical yet elusive factor impacting the mechanical properties of deep rocks. In this work, we shall develop a new micro‐thermomechanical model for rocks based on the Mori‐Tanaka homogenization scheme. Free energy and thermodynamic forces are deduced within the framework of irreversible thermodynamics, including the local stress applied on the mesocracks, damage driving force, macroscopic stress, and entropy. The salient innovation of this study lies in formulating subtle physically based temperature‐dependent friction and damage laws, considering the influence of ambient temperature on the mesocracking in rocks. Through a coupled friction‐damage analysis, a temperature‐dependent quasi‐static strength criterion and analytical stress‐strain‐damage relations are then derived. Physical implications and calibration methods of each parameter in the proposed model are meticulously presented. Furthermore, a semi‐implicit plasticity damage decoupled procedure (SIPDDC) integration algorithm is employed for the numerical implementation of the proposed model. Subsequently, numerical simulations are conducted to obtain the mechanical response of Jinping marble, Beibei sandstone, and Gongjue granite under various real‐time temperature‐confining pressure coupling conventional triaxial compression tests (TP‐CTC). The congruence of stress‐strain curves between model predictions and experimental data validates the robust performance and potential applicability of the proposed model.

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