Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradation
In underground coal gasification (UCG) projects, deeply buried subterranean projects are significantly influenced by high temperatures, alongside disruptive loads such as excavation, blasting, and drilling. Therefore, it is essential to study the fatigue behaviors of rocks under the coupled effects...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-11-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424023147 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850105090370699264 |
|---|---|
| author | Zeyue Wang Hang Lin Chaoyi Yang |
| author_facet | Zeyue Wang Hang Lin Chaoyi Yang |
| author_sort | Zeyue Wang |
| collection | DOAJ |
| description | In underground coal gasification (UCG) projects, deeply buried subterranean projects are significantly influenced by high temperatures, alongside disruptive loads such as excavation, blasting, and drilling. Therefore, it is essential to study the fatigue behaviors of rocks under the coupled effects of thermal elevation and cyclic loads. This study performed uniaxial compression and cyclic loading-unloading tests on red sandstone specimens with cavities. The high-temperature fatigue behaviors of specimens were explored from various aspects, encompassing stress, deformation, energy, damage, and the microstructural variations of the specimens after high-temperature procedures were assessed by utilizing scanning electron microscopy (SEM). At temperatures below 600 °C, SEM images indicate a contraction of microcracks in the specimens, whereas temperatures above this threshold lead to their expansion. Notably, the total, elastic, and dissipated energy density of the specimens exhibit a curve of second degree with the upper limit stress. Additionally, elastic and dissipated energy densities linearly correlate with input energy density. Furthermore, the coupled damage and axial strain of the specimens positively correlate with the temperature. The damage mode of thermal fatigue is attributed to the accumulation and penetration of transgranular fractures within the red sandstone. |
| format | Article |
| id | doaj-art-c9c9b338cf614b909369efed62891a38 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-c9c9b338cf614b909369efed62891a382025-08-20T02:39:11ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01333250326310.1016/j.jmrt.2024.10.044Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradationZeyue Wang0Hang Lin1Chaoyi Yang2School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China; Corresponding author. School of Resources and Safety Engineering Central South University Changsha, Hunan, 410083, China.School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China; Yunan Diqing Non-ferrous Metals Co., Ltd, Shangri-La, Yunan, 674400, ChinaIn underground coal gasification (UCG) projects, deeply buried subterranean projects are significantly influenced by high temperatures, alongside disruptive loads such as excavation, blasting, and drilling. Therefore, it is essential to study the fatigue behaviors of rocks under the coupled effects of thermal elevation and cyclic loads. This study performed uniaxial compression and cyclic loading-unloading tests on red sandstone specimens with cavities. The high-temperature fatigue behaviors of specimens were explored from various aspects, encompassing stress, deformation, energy, damage, and the microstructural variations of the specimens after high-temperature procedures were assessed by utilizing scanning electron microscopy (SEM). At temperatures below 600 °C, SEM images indicate a contraction of microcracks in the specimens, whereas temperatures above this threshold lead to their expansion. Notably, the total, elastic, and dissipated energy density of the specimens exhibit a curve of second degree with the upper limit stress. Additionally, elastic and dissipated energy densities linearly correlate with input energy density. Furthermore, the coupled damage and axial strain of the specimens positively correlate with the temperature. The damage mode of thermal fatigue is attributed to the accumulation and penetration of transgranular fractures within the red sandstone.http://www.sciencedirect.com/science/article/pii/S2238785424023147Red sandstoneFatigue loadMicrostructureEnergy evolutionCoupling damage |
| spellingShingle | Zeyue Wang Hang Lin Chaoyi Yang Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradation Journal of Materials Research and Technology Red sandstone Fatigue load Microstructure Energy evolution Coupling damage |
| title | Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradation |
| title_full | Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradation |
| title_fullStr | Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradation |
| title_full_unstemmed | Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradation |
| title_short | Fatigue-thermal damage characteristics of red sandstone with a hole under high-temperature cyclic loading coupling and microstructural degradation |
| title_sort | fatigue thermal damage characteristics of red sandstone with a hole under high temperature cyclic loading coupling and microstructural degradation |
| topic | Red sandstone Fatigue load Microstructure Energy evolution Coupling damage |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023147 |
| work_keys_str_mv | AT zeyuewang fatiguethermaldamagecharacteristicsofredsandstonewithaholeunderhightemperaturecyclicloadingcouplingandmicrostructuraldegradation AT hanglin fatiguethermaldamagecharacteristicsofredsandstonewithaholeunderhightemperaturecyclicloadingcouplingandmicrostructuraldegradation AT chaoyiyang fatiguethermaldamagecharacteristicsofredsandstonewithaholeunderhightemperaturecyclicloadingcouplingandmicrostructuraldegradation |