Thermal stress and stress intensity factor considering temperature dependent material properties
- a circular disk under constant heat flux -
Honda Sawao; Takahashi Toshifumi; Morooka Syouji; Zhang Shaowei; Nishikawa Tadahiro; Awaji Hideo
Abstract:An infrared radiation heating method was proposed previously as a new technique for estimating thermal shock parameters directly from electrical power charge. The method uses a thin-circular disk heated by infrared rays at the central area with a constant heat flux. In this report, temperature and stress distributions in the disk are analyzed numerically considering the temperature-dependent material properties of alumina and float glass, namely, temperature-dependent thermal conductivity and thermal diffusivity for the temperature distribution and temperature-dependent thermal expansion for the stress distribution. Furthermore, stress intensity factors are analyzed for a disk with an edge crack subjected to a constant heat flux. These results show that the temperature dependence of material properties has significant effects on the temperature and stress distributions. Key Words:temperature distribution, thermal stress, stress intensity factor, temperature dependent material properties. thermal shock testing, constant heat flax