INVESTIGATION ON EFFECTIVE MODULUS AND STRESS CONCENTRATION FACTOR OF 3D REINFORCED COMPOSITE BY FINITE ELEMENT ANALYSIS METHOD

Abstract

Micromechanics of Composites aims to analyze the localized stresses inside any given constituents of the composite structure. This Thesis is focused on Calculating the effective modulus and the Stress concentration factor of the 3D straight Fiber Composite using Finite Element(FE). The compressive and a Shear response of a 3D Straight fiber composite comprising three directional E Glass Fibers reinforced in an epoxy matrix is analysed. This result is the 10% of overall Composite Ductility and a 10% of overall Shear displacement load in the orthogonal directions. FE calculations are reported to analyse the response of 3d reinforcement as of with the reduced fiber volume fractions in the respective orthogonal directions. The FE calculations demonstrate that the three dimensionality of the microstructure constrains the kinks, and this results in the stable load response. Integrated Stresses of Constituents are formulated by FE to calculate the Effective Modulus and then Stress concentration factor(SCF) to understand the behavior along the orthogonally varied volume fraction models. SCF Gives us the vital information on how concentrated the stress are in loaded constituents when there is change in volume fraction orthogonally and would help in predicting the failure methods and fatigue life of the material.