Method of Laser Vibrating Defectoscopy of Multilayer Composite Materials

Abstract

Advanced modern technology is characterized by a globally constant growth of the use of polymeric composite materials, allowing developers to achieve better technical and economic characteristics. The appearance of multi-layered structures has required the development of new effective methods and means of nondestructive testing. The proposed laser-vibration method to identify defects in the internal structure of the multilayer composite materials provides an opportunity to receive generalized signals similar to the signals from several independent sensors; automated registration and processing of image content. In the presence of internal defects, the image of the reflected signal takes an elongated shape or have offsets and breaks interference fringes, as well as the shift of the maximum intensity in the images. Standard MATLAB package was used for capturing and processing images. Where is a bank of internal defects, which has been gained by experience.