Abstract
A BEM analysis system (BEM-LAM) of composite laminates with emphasis on accuracy and efficiency is developed. This system can analyze two-dimensional laminates for both isotropic and orthotropic layers under a plane strain state. Accuracy studies show that BEM-LAM using a subelement division scheme in quasi-singular integral gives very accurate solutions even if the layer aspect ratio is equal to thousands. In this study, the BEM-LAM is applied to analyze the problems of shear deformation, free-edge effects and multilayer structures. Accurate solutions are obtained which satisfy exactly the boundary conditions as well as continuity of traction and displacement on the interface between layers. This system could be applied to optimal design problems of laminate materials.
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