Theoretical and experimental study on relationship between stress-strain and temperature variation  

作　　者：CHEN ShunYun LIU LiQiang LIU PeiXun MA Jin CHEN GuoQiang 

机构地区：[1]Laboratory of Earthquake Dynamics,Institute of Geology,China Earthquake Administration,Beijing 100029,China

出　　处：《Science China Earth Sciences》2009年第11期1825-1834,共10页中国科学（地球科学英文版）

基　　金：Supported by Basic Research Funds from Institute of Geology,China Earthquake Administration (Grant No. DF-IGCEA-0607-1-5);National Natural Science Founda-tion of China (Grant Nos. 40572125, 90202018) ;Special Funds for Social Public of Ministry of Science and Technology (Grant No. 2004DIB3J129)

摘　　要：Principle on temperature response to the stress-strain variation is fundamental to the relationship between thermal radiation variation and stress-strain field. Current research indicates that temperature has a sensitive response to rock deformation under the condition of normal temperature background. However, the basic physical relationship between deformation and temperature variation is not clear and need to be investigated further. In this paper, principle on temperature response to stress-strain variation is studied in detail, based on thermodynamics, elastic strain theory, and experiments on both ideal material and rock. In the stage of elastic deformation, results indicate that: 1) temperature increment is positively correlated with volume strain variation. Temperature rises with hydrostatic pressure increase. In other words, temperature rises when the specimen is under the compressive state whereas temperature drops under the tensile state. 2) Pure shear deformation does not contribute to tempera- ture variation. Namely, shape change of specimen does not produce temperature variation. However, there exist the relative tensile area and the compressive one in the specimen under the state of pure shear. Temperature drops within the relative tensile area while temperature rises within the compressive areas during the process of loading.Principle on temperature response to the stress-strain variation is fundamental to the relationship between thermal radiation variation and stress-strain field. Current research indicates that temperature has a sensitive response to rock deformation under the condition of normal temperature background. However, the basic physical relationship between deformation and temperature variation is not clear and need to be investigated further. In this paper, principle on temperature response to stress-strain variation is studied in detail, based on thermodynamics, elastic strain theory, and experiments on both ideal material and rock. In the stage of elastic deformation, results indicate that: 1) temperature increment is positively correlated with volume strain variation. Temperature rises with hydrostatic pressure increase. In other words, temperature rises when the specimen is under the compressive state whereas temperature drops under the tensile state. 2) Pure shear deformation does not contribute to tempera- ture variation. Namely, shape change of specimen does not produce temperature variation. However, there exist the relative tensile area and the compressive one in the specimen under the state of pure shear. Temperature drops within the relative tensile area while temperature rises within the compressive areas during the process of loading.

关 键 词：STRESS-STRAIN temperature VARIATION volume STRAIN PURE SHEAR sine-wave load 

分 类 号：N[自然科学总论]