Analysis of interlaminar stress concentration in laminated structure - A review

Abstract

Composite materials are popular in the specialised construction industry, whether aviation or car industry or civil structures. Laminated composite is one of the prevalent forms. Analysis and design of laminated composite is the focus of the study. To obtain a better design of the laminated composite, understanding its behaviour properly is very important. Delamination is the critical phenomenon in the laminated composite plates and shell, which causes the failure. Delamination studies can be categorised into two parts: the onset of delamination and the second is the failure progression. Interlaminar stresses are the cause of the onset and progression of delamination in the laminated composites. Therefore, determining interlaminar stress is essential to predict the onset and failure progression due to delamination accurately. This paper reviews the historical attempts of study the delamination. This work is divided into the theoretical assumption, failure model and then numerical studies. In the numerical studies section finite difference method, 2D finite element method, and 3D finite element method have been discussed. Some other methods of analysis and important achievements have also been discussed.