Delamination and Fracture are the most common failure modes in composite materials, since they will result in the reduction of stiffness and can grow throughout other layers. Buckling is consisted of two main stages including delamination and fracture. Delamination is too consisted of two main stages including initiation and propagation. AE is a suitable method for in situ monitoring of damage in composite materials. In this study, by using AE monitoring, an experimental analysis on different sets of glass/polyester under buckling loading has been carried out. Scanning electron microscope (SEM) was used in thistest to show behavior of the initiation delamination damage.

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