Finite element analysis of double cantilever beam specimen using a higher order plate theory

Abstract

A nine noded lagrangian finite element for plate bending is developed using a higher order lamination theory. The higher order theory is based on the layer wise representation of inplane displacements. The accuracy of the theory is assessed by comparing results obtained from the present theory with available exact solutions for composite laminates subjected to transverse sinusoidal loading. The finite element model is used to analyze the homogeneous double cantilever beam specimen for characterizing the mode I interlaminar fracture energy in a composite material. The effect of slenderness ratio (crack length to hckness of the laminate) on the strain energy release rate on both isotropic and orthotropic specimens are investigated. The results are normalized with the values predicted using classical plate theory.