{"title":"混合模式断裂的热机械相场模型及其在类岩材料中的应用","authors":"","doi":"10.1016/j.ijrmms.2024.105907","DOIUrl":null,"url":null,"abstract":"<div><div>Thermally induced fracture is a common phenomenon for concrete and rock-like materials, which presents a significant challenge to numerical modelling. In this work, a thermo-mechanical model for mixed-mode fracture based on phase-field method is proposed. This approach overcomes the difficulties of modelling the thermally induced cracking process when it comes to complex fracture patterns. To simulate different failure modes in thermo-mechanical conditions, the model's constitutive expression includes a unified failure criterion that takes into account both tensile and shear strengths. The proposed formulation provides a length scale insensitive response for brittle materials such as rocks, although other prevalent phase-field theories for purely mechanical fracture can also be involved. The computational results of the representative examples for rock-like materials are highly consistent with prior findings. It demonstrates that the presented model can effectively reproduce the thermally induced cracking process for various cracking patterns, such as tensile, shear, and tensile-shear fractures, indicating the method's remarkable capabilities for further research.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":null,"pages":null},"PeriodicalIF":7.0000,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A thermo-mechanical phase-field model for mixed-mode fracture and its application in rock-like materials\",\"authors\":\"\",\"doi\":\"10.1016/j.ijrmms.2024.105907\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Thermally induced fracture is a common phenomenon for concrete and rock-like materials, which presents a significant challenge to numerical modelling. In this work, a thermo-mechanical model for mixed-mode fracture based on phase-field method is proposed. This approach overcomes the difficulties of modelling the thermally induced cracking process when it comes to complex fracture patterns. To simulate different failure modes in thermo-mechanical conditions, the model's constitutive expression includes a unified failure criterion that takes into account both tensile and shear strengths. The proposed formulation provides a length scale insensitive response for brittle materials such as rocks, although other prevalent phase-field theories for purely mechanical fracture can also be involved. The computational results of the representative examples for rock-like materials are highly consistent with prior findings. It demonstrates that the presented model can effectively reproduce the thermally induced cracking process for various cracking patterns, such as tensile, shear, and tensile-shear fractures, indicating the method's remarkable capabilities for further research.</div></div>\",\"PeriodicalId\":54941,\"journal\":{\"name\":\"International Journal of Rock Mechanics and Mining Sciences\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.0000,\"publicationDate\":\"2024-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Rock Mechanics and Mining Sciences\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1365160924002727\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Rock Mechanics and Mining Sciences","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1365160924002727","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
A thermo-mechanical phase-field model for mixed-mode fracture and its application in rock-like materials
Thermally induced fracture is a common phenomenon for concrete and rock-like materials, which presents a significant challenge to numerical modelling. In this work, a thermo-mechanical model for mixed-mode fracture based on phase-field method is proposed. This approach overcomes the difficulties of modelling the thermally induced cracking process when it comes to complex fracture patterns. To simulate different failure modes in thermo-mechanical conditions, the model's constitutive expression includes a unified failure criterion that takes into account both tensile and shear strengths. The proposed formulation provides a length scale insensitive response for brittle materials such as rocks, although other prevalent phase-field theories for purely mechanical fracture can also be involved. The computational results of the representative examples for rock-like materials are highly consistent with prior findings. It demonstrates that the presented model can effectively reproduce the thermally induced cracking process for various cracking patterns, such as tensile, shear, and tensile-shear fractures, indicating the method's remarkable capabilities for further research.
期刊介绍:
The International Journal of Rock Mechanics and Mining Sciences focuses on original research, new developments, site measurements, and case studies within the fields of rock mechanics and rock engineering. Serving as an international platform, it showcases high-quality papers addressing rock mechanics and the application of its principles and techniques in mining and civil engineering projects situated on or within rock masses. These projects encompass a wide range, including slopes, open-pit mines, quarries, shafts, tunnels, caverns, underground mines, metro systems, dams, hydro-electric stations, geothermal energy, petroleum engineering, and radioactive waste disposal. The journal welcomes submissions on various topics, with particular interest in theoretical advancements, analytical and numerical methods, rock testing, site investigation, and case studies.