Critical Biot's number for Determination of the Sensitivity of Spherical Ceramics to Thermal Shock
LIU Qing-Nian1, MENG Song-He2, JIANG Chi-Ping3, SONG Fan1
1State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 2Centre for Composite Materials, Harbin Institute of Technology, Harbin 150080 3Solid Mechanics Research Center, Beijing University of Aeronautics and Astronautics, Beijing 100191
Critical Biot's number for Determination of the Sensitivity of Spherical Ceramics to Thermal Shock
LIU Qing-Nian1, MENG Song-He2, JIANG Chi-Ping3, SONG Fan1
1State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 2Centre for Composite Materials, Harbin Institute of Technology, Harbin 150080 3Solid Mechanics Research Center, Beijing University of Aeronautics and Astronautics, Beijing 100191
A critical Biot number, which determines both the sensitivity of spherical ceramics to quenching and the durations of the temperature-wave propagation and the thermal stresses in the ceramics subjected to thermal shock, is theoretically obtained. The results prove that once the Biot number of a ceramic sphere is greater than the critical number, its thermal shock failure will be such a rapid process that the failure only occurs in the initial regime of heat conduction, whereas the thermal shock failure of the ceramic sphere is uncertain in the course of heat conduction. The presented results provide a guide to the selection of the ceramics applied in the thermostructural engineering with thermal shock.
A critical Biot number, which determines both the sensitivity of spherical ceramics to quenching and the durations of the temperature-wave propagation and the thermal stresses in the ceramics subjected to thermal shock, is theoretically obtained. The results prove that once the Biot number of a ceramic sphere is greater than the critical number, its thermal shock failure will be such a rapid process that the failure only occurs in the initial regime of heat conduction, whereas the thermal shock failure of the ceramic sphere is uncertain in the course of heat conduction. The presented results provide a guide to the selection of the ceramics applied in the thermostructural engineering with thermal shock.
LIU Qing-Nian;MENG Song-He;JIANG Chi-Ping;SONG Fan. Critical Biot's number for Determination of the Sensitivity of Spherical Ceramics to Thermal Shock[J]. 中国物理快报, 2010, 27(8): 88104-088104.
LIU Qing-Nian, MENG Song-He, JIANG Chi-Ping, SONG Fan. Critical Biot's number for Determination of the Sensitivity of Spherical Ceramics to Thermal Shock. Chin. Phys. Lett., 2010, 27(8): 88104-088104.
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2010, Vol. 27 
