Thermal Shock of Semi-Infinite Cellular Ceramics

Y.X. Zhang; B.L. Wang

doi:10.4028/www.scientific.net/AMR.476-478.1041

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 476-478Thermal Shock of Semi-Infinite Cellular Ceramics

Thermal Shock of Semi-Infinite Cellular Ceramics

Abstract:

Considered in this paper is a semi-infinite cellular ceramic solid containing an edge crack. The solid is subjected to a sudden cooling on its surface. The temperature field and associated thermal stress field for the uncracked solid are calculated. The stress for uncracked medium is used as the crack surface stress with opposite sign to formulate the mixed boundary value problem. The stress intensity factors as the function of crack length, time and relative density are calculated. It is found that the presence of porosity in the ceramic is generally beneficial to increasing the thermal shock strength of the ceramics if the failure is dominated by a pre-existing crack. The paper may be helpful for the design and manufacturing of advanced thermal shock resistive cellular ceramics.

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Periodical:

Advanced Materials Research (Volumes 476-478)

Pages:

1041-1045

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.476-478.1041

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Online since:

February 2012

Authors:

Y.X. Zhang, B.L. Wang

Keywords:

Cellular Ceramics, Stress Intensity Factor (SIF), Thermal Shock

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