Variations of Temperature in Specimens of Rocks and Geomaterials under Failure
V. V. SEREDIN, A. S. KHRULEV
Perm State University, ul. Bukireva 15, Perm, 614990 Russia
Keywords: напряжения в грунтах, трещина разрушения, температура, одноосное сжатие и растяжение, soil stress, critical crack, temperature, uniaxial compression and tension
Abstract
Loading causes stress concentration around defects in rocks, which induces initiation and propagation of cracks. Physically, external loading shows itself in rocks as acoustic and electromagnetic emission, included infrared radiation. Experimentally, it is found that in specimens of geomaterials under uniaxial tension, temperature is minimum; under uniaxial compression, temperature grows; under triaxial stress, temperature is maximum. It has been succeeded to derive equations for temperature prediction in a material in the zone of main crack as function of failure load. The method to estimate stress state based on the data on infrared radiation in materials is developed.
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