Influence of Coating on Micro Stress Distribution in Cylindrical FRP Composites

Abstract

Composite materials have boundless applications in engineering as these exhibit high specific strength and stiffness properties. In order to achieve high stiffness each constituent present in the material play a significant role. In has been observed through literature survey that coating properties influence more than other constituents since it is acting as a bonding agent between fiber and matrix and also transfer load from the matrix to the fiber. In this work an attempt has been made to analyze extensively the influence of HM and LM coating on micro stress distribution for cylindrical composites under thermal and mechanical loadings applied individually and also simultaneously. The stress distribution in intra and inter laminar regions for composites made of carbon and S glass fiber has been estimated for low and high modulus epoxy coating and matrix. Similar stress distribution from an existing analytical model has been used and a comparative study on stress distribution is carried with numerical analysis using a four phase cylindrical composite assembly model. Both analytical and numerical stress distribution patterns under thermal and mechanical loadings have been compared in this analysis. Also a comparison has been made while thermal and mechanical loadings are applied simultaneously.