Determination of Thermal Contact Resistance in Two-Layer Composites by Flash Method(Welding Physics, Process & Instrument)

概要

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A new method by the laser flash method for determining the thermal contact resistance at the interlayer surfaces of two-layer composites are proposed. The time required for the temperature to rise 50 percents, for example, of the maximum temperature increase is read from the temperature versus time curve of the rear surface obtained by experiments. These results are used for the numerical computation based on the theoretical equation of the temperature increase of the rear surface and an iteration method, for example, regula falsi. The influence of the error of each parameter, that is, thickness of each layer, measuring time and thermophysical properties on the measured results is investigated. The present method is applied to some joining specimens and the effectiveness of this method is confirmed. Furthermore, temperature dependence of the thermal contact resistance is also investigated.
大阪大学の論文