An analytical model for thermal residual interface stresses in continuous fiber-reinforced composites (Q1282638)

We propose an analytical model to predict thermal stresses at the fiber-matrix interface in continuous fiber-reinforced composites. First, the initial imperfections in fiber layout are introduced, which are assumed to be the extensional fiber misalignment and the local fiber misalignment, respectively. Then the displacement fields subjected to thermal loadings are found for the two cases. The former is based on Timoshenko beam theory and classical elasticity, and the latter based on variational principles. Finally, the thermal residual stresses are determined using the linear stress-strain relationships.