THERMAL SCIENCE

International Scientific Journal

Dong Wang

,

Xin-Zhong Wang

,

Guang-Ze Zhang

,

Zheng-Xuan Xu

,

Zhi-Jun Liu

,

Tao Feng

,

Ru Zhang

,

Zhi-Long Zhang

,

Gan Feng

,

Li Ren

ENERGY EVOLUTION AND DISTRIBUTION LAW OF ROCK UNDER THERMAL MECHANICAL COUPLING

ABSTRACT
The characteristics of the energy evolution and distribution of rock during deformation and failure were studied based on thermal mechanical coupling tests completed by Min Ming at his Master’s thesis in 2019. Dissipated energy is greater than elastic energy at the crack closure stage, while elastic energy is dominant at the linear elastic stage. At the post-peak failure stage, elastic energy is released rapidly before 800°C and released slowly at 1000°C. A comprehensive evaluation index to examine the influence of temperature on rock strength and deformation ability was proposed from the perspective of elastic energy accumulation ability. The negative effect of temperature on the strength of the rock sample is weaker than that on the elastic modulus before 400°C. The negative effect of temperature on the strength of the rock sample is stronger than that on the elastic modulus after 600°C.
KEYWORDS
thermal mechanical coupling, energy evolution, energy distribution, comprehensive evaluation index of strength and deformation
PAPER SUBMITTED: 2021-08-10
PAPER REVISED: 2021-08-28
PAPER ACCEPTED: 2021-09-02
PUBLISHED ONLINE: 2022-04-09
DOI REFERENCE: https://doi.org/10.2298/TSCI2202081W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 2, PAGES [1081 - 1088]
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Energy evolution and distribution law of rock under thermal mechanical coupling

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence