定常温度分布における外周縁クラック円環の熱応力拡大係数

抄録

The thermal stress intensity factors for the crack on the outer edge of annulus under steadystate temperature distribution are evaluated by the photothermoelastic experiment. The photoelastic epoxy resin models of annuli with the various crack depth and wall thickness are prepared and installed in the vacuum chamber equipped in the experimental apparatus. The steady-atate temperature distribution of the annulus model under heating conditions of 5°C and 0°C on the inner and outer edges, respectively, is realized by means of the high frequency induction heating apparatus developed by the authors, into which the cooling system is incorporated.
The image processing analyzer is used effectively to collect the image data from the isochromatic fringe patterns around the crack tip. These data are analyzed using the overdeterministic method. The results estimated for the thermal stress intensity factors are shown in diagrams.