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Jin, YunzheKTH,Hållbar utveckling, miljövetenskap och teknik,School of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
Experimental and numerical simulation study on the evolution of mechanical properties of granite after thermal treatment
- Artikel/kapitelEngelska2024
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Elsevier BV,2024
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Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-347288
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-347288URI
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https://doi.org/10.1016/j.compgeo.2024.106464DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20240610
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High temperature significantly influences the mechanical properties of granite, which is relevant to various engineering applications, including geothermal energy extraction. The objective of this study is to investigate the meso-mechanics of granite, specifically focusing on the formation of thermal cracks and the temperature-dependent mechanical properties in heterogeneous rock. Firstly, we heat the granite to 25–1000 ℃ by muffle furnace. Following this, we conduct triaxial compression tests with 0–20 MPa confining pressures on the heated-specimens cooled by cold water. Subsequently, we combine the grain-based model (GBM) and the finite-discrete element method (FDEM) to simulate the heat treatment process and the triaxial experiments. We calibrate the micromechanical parameters of granite by experimental results. Results show that the mechanism behind the formation of thermal cracks in granite subjected to high-temperature is the differential thermal expansion coefficients of mineral particles in granites, leading to the degradation of mechanical properties in thermal-treated granite. The temperature threshold for the formation of thermal cracks is between 500 °C and 550 °C. Particularly, the stress-strain curve of granite exhibits ideal elastic-plastic characteristics under temperature is 1000 °C. These results can help to demonstrate the temperature-dependent evolution of mechanical properties of crystalline rocks, providing a theoretical basis for the utilization of engineering applications.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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He, ChenSchool of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
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Yao, ChiSchool of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
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Sun, ZhejieSchool of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
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Wang, JiliSchool of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
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Zhang, XiaoboSchool of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
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Yang, JianhuaSchool of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
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Jiang, QinghuiState Key Laboratory of Civil Engineering, Wuhan University, Wuhan 430072, China
(författare)
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Zhou, ChuangbingSchool of Infrastructure Engineering, Nanchang University, Nanchang 330032, China
(författare)
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KTHHållbar utveckling, miljövetenskap och teknik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Computers and geotechnics: Elsevier BV1720266-352X1873-7633
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