A Study on the Thermoelastic Analysis in Shear Deformable Discontinuous Composites
A stress analysis has been performed to evaluate the thermally induced elastic stresses which can develop in a short fiber composite due to coefficient of thermal expansion (CTE) mismatch. An axisymmetric finite element model with the constraint between cells has implemented to find the magnitude of thermoelastic stresses in the fiber and the matrix as a function of volume fraction, CTE ratio, modulus ratio, and fiber aspect ratio. It was found that the matrix end regions fall under significant thermal stresses that have the same sign as that of the fibers themselves. Furthermore, it was found that the stresses vary along the fiber and fiber end gap in the same manner as that obtained in a shear-lag model during non-thermal mechanical loading.
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
H. G. Kim "A Study on the Thermoelastic Analysis in Shear Deformable Discontinuous Composites", Key Engineering Materials, Vols. 261-263, pp. 645-650, 2004