Three dimensional stress analysis of symmetric composite laminates under uniaxial extension and in-plane pure shear

Abstract

This paper presents the stress and strain distribution obtained numerically in the thickness direction in the central region of symmetric composite laminates under uniaxial extension and in-plane pure shear loading. It is shown that in the symmetric angle-ply laminates, near the interlaminar surface, there is an interlaminar boundary-layer effect. The abrupt change of the fiber orientation at the interlaminar surface causes a high concentration of stresses and a local three dimensional stress state.