Evaluation of flexural modulus of carbon 3D orthogonal woven fabric using a trilinear model

Abstract

Bending behaviour of 3D orthogonal carbon weave composite reinforcement has been investigated. The three-point bending test method has been employed and the load-deflection curves are examined. The influence of carbon fibre tow type, yarn insertion and tension of longitudinal yarns on fibre volume fraction and bending properties of non-crimp 3D orthogonal carbon weave is discussed. It is found that carbon fibre bending properties due to cross-section shape and geometry have a great impact on bending behavior of non-crimp 3D orthogonal carbon weave. Increasing the number of transversal yarns layers and tension of longitudinal yarns increases both fibre volume fraction and bending modulus of non-crimp 3D orthogonal carbon weave. From the bending properties calculated, the factors for improving fibre volume fraction and bending behavior of non-crimp 3D orthogonal carbon weaves are discussed.