異材接合継手の剥離温度に及ぼす試験片寸法の影響

概要

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Experiments on exfoliation temperature at the interface of a bonded joint have been made to estimate the joint strength of dissimilar materials and the effect of specimen size on the strength. The joint was made of a resin cured on steel. The exfoliation temperature was measure by a thermocouple and visual observation. It is shown from the experimental results that the exfoliation temperature becomes constant when the width of resin is greater than 8 times the thickness of the resin and when the thickness of the steel is greater than twice that of the resin. The energy release rate g-value of virtual crack length, which exists within a singular field in the vicinity of the corner due to a combination of dissimilar materials and the wedge angle, is a useful parameter for predicting the exfoliation temperature.
1993-11-25