Prediction of fiber-matrix interphase properties and their influence on interface stress, displacement and fracture toughness of composite material

摘要: Abstract An elastic shear lag analysis, which includes an interphase region, has been developed and correlated with the micro-debonding test data of Mandell et al. to determine thickness material properties interphase. The strength relationship between modulus were determined for both glass-epoxy graphite-epoxy composites. axisymmetric finite element model, obtained from was also developed. effects on stresses deformation at interface fracture toughness fibrous composites investigated. following conclusions drawn study: (1) by including interphase, analysis model provide very good predictions; (2) exists is softer than matrix; (3) significant effect stress concentration, displacement composite.