FE-BASED PREDICTION OF THE NONLINEAR IN-PLANE SHEAR RESPONSE OF WOVEN LAMINATES

摘要

A predictive approach for the mechanical behavior of woven laminates is presented and applied to a twill-weave carbon fiber reinforced composite laminate subjected to in-plane shear. The woven architecture is initially considered and a representative volume identified. A 3D finite element model of the representative volume is developed defining appropriate boundary conditions to enforce continuity and periodicity in stresses and strains. Stiffness and damage evolution up to final rupture of the model laminate under in-plane shear loading is determined on the basis of the properties of the constitutive materials and of a damage model. The computational results are discussed in the light of parallel experiments on actual composite laminates. Modeling issues affecting predicted stiffness and strength are also discussed.