Non-destructive damage evaluation of composites with acoustic emission method

The applications of reinforced composites and heterogeneous solid materials have been widely developed in different fields of aerospace and mechanical engineering. In this research, the necessity of using non-destructive methods in identifying possible damages in composite materials is pointed out. In addition, the acoustic emission method is described and compared with other non-destructive evaluation methods. It is stated that acoustic emission is a dynamic diagnosis method which can instantly show discontinuities in a structure under tension. The nature of acoustic emission signals is mentioned as an electrical signal. Finally, it is concluded that the best method to check the delamination and fiber damage in composite laminates is the acoustic emission method.