Abstract

The delamination is defect which leads to reduce the mechanical properties of composite structure, as a results different mechanical behavior of the structure can be altered. Since the buckling behavior is one the most important mechanical behavior of composite structure for many engineering application. Then, it is necessary to investigate the effect of various delamination parameters, such as size (dimensions of delamination) and position (at x, y, and z-directions) on the buckling characterization of composite plate structure. The present study includes evaluating of the critical buckling load by using two techniques. First, experimental techniques, by testing the plates manufactured samples (including delamination) with buckling test, As well as, evaluating the mechanical properties of materials which are necessary to be used as input data for numerical techniques. Second, numerical technique by using Ansys program as an application of finite element method. A comparison between the results of the two methods are made to show the validity of these techniques. A model of composite plate combined from glass woven reinforcement fiber and epoxy resin materials with six layers is fabricated and tested, the plate is clamped supported from two edge and free supported from other edges. The comparison between the results shows an acceptable agreement between the experimental and numerical analysis where the error is not exceed about (10.7%). Finally, the results show that the delamination leads to reduce the buckling strength of composite plate structure, with the increasing of the delamination size and as the location is approached the point at which the maximum bending moment occurs.