H. Awaji et al., ANALYSIS OF TEMPERATURE STRESS DISTRIBUTIONS IN THERMAL SHOCKED CERAMIC DISKS IN RELATION TO TEMPERATURE-DEPENDENT PROPERTIES/, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 106(4), 1998, pp. 358-362
An infrared irradiation heating method has previously been proposed as
a technique for directly estimating thermal shock parameters from an
electric charge. In this method, a thin circular disk is irradiated wi
th infrared rays over its central area at a constant heat flux. In thi
s report, we analyzed the temperature/thermal stress distributions in
the disk in relation to the temperature-dependent material properties
of ceramics, namely the temperature distributions relating to temperat
ure-dependent thermal conductivity and thermal diffusivity, and the th
ermal stress distributions relating to temperature-dependent thermal c
onductivity, thermal diffusivity and thermal expansion. The results re
veal that these temperature dependent properties yield marked effects
on the temperature/stress distributions in the disk. A number of possi
bilities are suggested for decreasing thermal stresses in ceramic stru
ctures by selecting appropriate combinations of temperature-dependent
properties.