The influence of fiber waviness on the reduction of critical buckling load of composites containing fiber waviness

Abstract

The present research involves the development of theoretical model to investigate the effect of the in-plane fiber waviness on the critical shear buckling load of multilayered composite plates. This paper analyzes the in-plane shear buckling behavior of a clamped composite laminate in which fibers are considered as in-plane sinusoidal curves. The sinusoidal fiber orientation induces a change in the lamina elastic properties, which influence the laminate extensional, coupling, bending stiffness, and buckling strength. Stability of the plate is investigated and reduction of critical buckling load versus fiber waviness is obtained. The stress distribution in the layer containing fiber waviness is calculated. It was found that reduction of stiffness, and buckling loads are substantial.