Modeling damage evolution in granite under temperature using a thermo-mechanical grain-based FDEM model
文献类型：期刊论文
| 作者 | Zhang, Shirui1,2; Qiu, Shili2; Jiang, Quan2; Yan, Chengzeng3; Zhou, Liangyin2; Li, Xinhong2 |
| 刊名 | COMPUTERS AND GEOTECHNICS
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 169页码:15 |
| 关键词 | Granite FDEM Coupled thermal -mechanical model Grain -based model Damage behavior |
| ISSN号 | 0266-352X |
| DOI | 10.1016/j.compgeo.2024.106198 |
| 英文摘要 | Temperature has a significant impact on the microscopic damage and macroscopic mechanical properties of brittle heterogeneous rocks. The grain-based model and grain-growth method were used to reconstruct Beishan granite (BsG) based on the combined finite-discrete element method (FDEM). In addition, a uniaxial loading simulation method for a preheated model was proposed to study the effect of temperature on the thermal cracking and mechanical behavior of BsG. This study found that the crack inclination angle and spatial distribution characteristics of samples have significant temperature dependence. The inter-grain crack aperture is closely related to the nonlinear thermal expansion coefficient and thermal mismatch of minerals. The amount of thermal energy absorbed by mineral crystals is mainly related to the specific heat capacity of the mineral, which is ultimately converted into strain energy and kinetic energy. The transfer of thermal energy causes the thermal vibration effect. The higher the temperature is, the larger the tensile stress and compressive stress. The location of the maximum tensile stress is generally at grain boundaries. As the temperature increases, the peak strength and elastic modulus of BsG decrease, and the ductility increases. The cracks induced by thermal stress become the main defect location of the sample, and the phenomenon of splitting failure appears macroscopically. The inclination angle of shear cracks does not change much with temperature, and the orientation distribution of the tension cracks becomes more isotropic as the temperature increases. The research results have guiding significance for stability evaluation in energy geotechnical engineering. |
| 资助项目 | National Natural Science Foun-dation of China[42377172] ; National Natural Science Foun-dation of China[52325905] |
| WOS研究方向 | Computer Science ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001209651400001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41147]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qiu, Shili |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Shirui,Qiu, Shili,Jiang, Quan,et al. Modeling damage evolution in granite under temperature using a thermo-mechanical grain-based FDEM model[J]. COMPUTERS AND GEOTECHNICS,2024,169:15. |
| APA | Zhang, Shirui,Qiu, Shili,Jiang, Quan,Yan, Chengzeng,Zhou, Liangyin,&Li, Xinhong.(2024).Modeling damage evolution in granite under temperature using a thermo-mechanical grain-based FDEM model.COMPUTERS AND GEOTECHNICS,169,15. |
| MLA | Zhang, Shirui,et al."Modeling damage evolution in granite under temperature using a thermo-mechanical grain-based FDEM model".COMPUTERS AND GEOTECHNICS 169(2024):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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