Damage detection in glare plate-like structures

With the development of new technology and use oflightweight material such as composite laminates, new methods must be developed for in-situ structural health monitoring of these materials. In this paper, a numerical study of a new method for the detection of delamination present in Glare plate-like structures is introduced. The method is based on the change in the group velocity of Lamb waves with frequencythickness product as the determinant parameter for the detection of delamination. The generation of selective Lamb mode was numerically simulated using a finite element method and the finite element analysis was based on the transmitted signal. The numerical results were validated against analytical predictions and indicated good agreement. It was found that the method enabled the detection of delamination in the Glare specimens, showing an increase in group velocity when delamination occurs.