散逸エネルギ計測に及ぼす塗膜の影響

抄録

The fatigue limit estimation based on the dissipated energy measurement has been developed and the applicability of this technique for some steels has been investigated. The coating was applied to the component of the industrial structures. It is useful to measure the dissipated energy and apply the fatigue limit estimation for the industrial component without removing the coating. In this study, the effect of the coating on the dissipated energy measurement was investigated. The black body treatment is required for the infrared thermography measurement because of the metallic reflection. The sanding of coating is enough for the measurement of dissipated energy without the black body treatment of the coating. The dissipated energy measurement in the stair case like stress level test was applied to the specimen having various coating thickness. It was found that the temperature change due to the dissipated energy can be obtained even though the temperature change was attenuated by the coating with 200μm thickness.