DAMAGE AND FAILURE MODELLING IN FIBER-REINFORCED COMPOSITES AT COMBINED LOADING

摘要

This study deals with the investigation of the nonlinear deformation and damage processes in the matrix of the unidirectional fiber-reinforced composite with fibers disordered in transversal plane at combined transversal loading. The nonlinear boundary-value problem for the composite fragments is considered to calculate the stress and strain fields in matrix and fibers of the composite. The macrostress and macrostrain are calculated by averaging these fields upon a sample of the composite fragments. The macrostress-macrostrain curves and macrostrength surface for the glass-epoxy composite are constructed. The comparison with the results for the composite model with the fiber periodic arrangement is performed.