In this paper, a modified VCCT (Virtual Crack Close Technology) is developed to compute strain energy release rates of tire belt (a kind of composite structure) under different delamination lengths.

Aiming at the sonar dome in submarines, this thesis mainly addresses the vibration and acoustic characteristics of intact and delamination-damaged structures of composite materials.

Predicting residual compression strength of composite laminates with delamination is a very important research subject for Engineering composite structure designers.