Ultrasonic wave and stress analysis for bonded joints

This article discusses the use of pulse-echo ultrasonic testing for the inspection of adhesive bonds between thin sheet metal bonded joints. The method is based on the ultrasonic wave analysis at the metal/adhesive interface. The physical aspects of the phenomenon, an index is defined to detect stress zone of the joint, the influence of the experimental variables(variable stress...) on the measurement is discussed. By means of a control experiment, it is shown that frequency energy density in adhesive joints was confirmed the transition by stress variation