弾性波反射・伝搬特性に基づく接着接合部における被着体・接着層厚さと界面剛性の同時推定法の検討

抄録

A method is proposed to simultaneously estimate adherend and adhesive thicknesses, and two interfacial stiffnesses for an adhesive joint. Numerical calculations on the model of the adhesive joint show that adherend and adhesive thicknesses can be evaluated based on notch frequencies of the reflection spectra. It was also found that there are some combinations of interfacial stiffnesses that give almost identical notch frequencies. The values of the two interfacial stiffnesses also affect the ratio of the reflection coefficients of the two adjacent notches. In addition, the present method was applied to the adhesive joints containing adherend contamination. The experimental results suggest that this method can be used to evaluate the thickness of adherend and adhesive. In the RA specimen, the interfacial stiffness of the interface with the release agent was less than that of the other interface in all evaluated cases.