The Effect of Void Shape and Volume Fraction of Fibers on the Stress Distribution in a Laminated Composite Plate with Triangular Fibers

摘要

The effect of void shape and volume fraction of fibers on the distribution of stresses in a laminated composite plate subjected to a tensile load applied in the fiber direction is investigated. The cross section of all fibers is triangular. The void can simulate an internal crack or a cylindrical hole. The shear-lag model is used to derive the field equations. By using proper boundary and bonding conditions, complete load and displacement fields in the laminate are determined. The effects of physical parameters of fibers and of void shape and its location on stress concentrations and peak shear stresses in the laminate are studied. The analytical results for stress concentration factors are compared with those given by the finite-element method, and a close agreement between them is found to exist.