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Transient Thermal Stresses in Rectangular Prism.

Cheung-JB; Thirumalai-K; Chen-T
J Eng Mech Div Am Soc Civil Eng 1974 Apr; 100(Em2):463-467
Fracture and fragmentation of brittle materials by heating are well- known but poorly understood phenomena. The process of thermal fragmentation, though not desirable in high temperature applications of ceramics, is used to break rocks and minerals. Fragmentation of corners of brittle materials by thermal stress concentrations induced during surface heating is a commonly known phenomenon. This study was carried out to help understand the initial stress concentrations and resulting fragmentation during surface heating of brittle prism solids. The present study deals with an infinitely long rectangular prism heated on its surface by a constant flux. The prism body is considered to be linearly elastic, homogeneous, and isotropic. To simplify the analysis, a plane strain assumption is used. Experiments were carried out on quartzite rock prisms subjected to a sudden uniform heating to correlate the theoretical predictions.
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OP 97-74
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J. Eng. Mech. Div., Am. Soc. Civil Eng., V. 100, No. Em2, April 1974, PP. 463-467