Ultrasonic inspection of metal plastic connection

Adhesive heterogeneous materials are of great interest in the aerospace and automotive industries because of their ability to provide excellent structural characteristics and reduce weight to save energy. Despite the extensive work done for the study, it is still difficult to detect such defects in compounds of dissimilar materials due to the large differences in the properties of metals and composites, as well as the multilayer structure of the component. The aim of this work is to improve the detectability of defects in adhesive bonded aluminum and plastic reinforced with carbon fiber (carbon fiber) by developing an improved algorithm for subsequent processing. It was determined that the analysis of multiple reflections has a high potential for improving detectability in accordance with the results obtained as a result of inspection modeling and evaluation of boundary characteristics. The influence of such a very important parameter as the curvature of the sample can be eliminated by equalizing the arrival time of the signals reflected from the sample. In the case of an adhesive joint, a high stress concentration is eliminated and a uniform stress distribution is ensured. Other advantages of the adhesive joint are its resistance to fatigue, as well as the ability to maintain the structural integrity of the materials being joined, connect dissimilar materials and reduce the weight of the structure.