- Title
- Water Saturation Effects on Thermal Infrared Radiation Features of Rock Materials During Deformation and Fracturing
- Creator
- Cai, Xin; Zhou, Zilong; Tan, Lihai; Zang, Haizhi; Song, Zhengyang
- Relation
- Rock Mechanics and Rock Engineering Vol. 53, Issue 11, p. 4839-4856
- Publisher Link
- http://dx.doi.org/10.1007/s00603-020-02185-1
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2020
- Description
- This paper aims to investigate the water saturation effects on the thermal infrared radiation (IRR) characteristics of rock materials during deformation and fracturing processes. Three kinds of rocks, namely sandstone, granite, and marble, were adopted for tests. Uniaxial compression tests were carried out on oven-dried and water-saturated rock samples. The evolution of IRR temperature on rock surface was monitored and recorded with the aid of an infrared thermographic camera. Test results show that the IRR temperature of saturated samples is apparently higher than that of dry ones subjected to the same axial stress. After water saturation, the heating rate in elastic deformation phase, the IRR temperature increment at peak stress, and the IRR temperature on the new-formed fracture surface have a significant growth compared to dry condition. These indicate that the presence of water facilitates the release of thermal energy. The sensitivities of the heating rates in elastic deformation phase to water saturation are very distinct for the three rocks. This is possibly resulted from the mineral composition of rock types, especially the proportion of calcite and swelling clay minerals. The IRR temperature increment at peak stress for rock not only depends on the moisture condition, but is also relevant to the uniaxial compressive strength.
- Subject
- thermal infrared radiation; water saturation; average infrared radiation temperature; coupling thermal-elastic effect; rock fracture
- Identifier
- http://hdl.handle.net/1959.13/1454453
- Identifier
- uon:44944
- Identifier
- ISSN:0723-2632
- Language
- eng
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