Investigation of the delamination type defects parameters in multilayered GLARE3-3/2 composite material using air – coupled ultrasonics technique

Abstract

Air – coupled ultrasonic investigation possess a great potential for investigation of aerospace composite materials, because it avoids disadvantages caused by immersion or contact techniques. In the work the test sample of the GLARE3-3/2 composite material with artificial delamination type defect was investigated. Numerical and experimental investigations using focussed air – coupled ultrasonic transducers were carried out in a through transmission mode. Numerical investigation was carried out using the Wave 2000 software based on a finite differences method. The interaction of ultrasonic wave with a delamination type defect was investigated. Dimensions of the delamination type defects were measured experimentally.