チョウ　ヒデオ   CHO Hideo   長　秀雄    所属   青山学院大学  理工学部 機械創造工学科    職種   教授
言語種別	英語
発行・発表の年月	2015/02
形態種別	学術雑誌
査読	査読あり
標題	Characterization of the bond quality of adhesive plates utilizing zero-group-velocity Lamb waves measured by a laser ultrasonics technique
執筆形態	共同
著者・共著者	Hideo CHO, Yudai YAGUCHI and Hiroaki ITO
概要	The bonding quality of an adhesive component was estimated using the frequency of zero-group-velocity (ZGV) Lamb waves, which can be generated and detected with a laser ultrasonic technique. Two distinct peaks corresponding to ZGV Lamb waves in the amplitude spectrum were obtained for well- and weak-bonded adhesive plate samples. The frequency difference between the measured low frequency mode and the calculated frequency, which can be obtained by assuming a continuous stress and strain at a bonding interface, linearly increased with shear strength, as obtained by the shear-tensile test. The frequency of ZGV Lamb waves was also calculated with reduced shear modulus of the bonding layer to express a weak bonding, and the change in the calculated frequency in low frequency ZGV Lamb waves showed a similar tendency to that in measured one.