Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
STUDY OF EFFECTIVE SHEAR MODULUS ON FLEXIBLE COMPOSITES UNDER SIMPLE SHEAR
Submission Author:
RENATO PENHA FARIA , RJ
Co-Authors:
RENATO PENHA FARIA, Luiz Nunes
Presenter: RENATO PENHA FARIA
doi://10.26678/ABCM.COBEM2019.COB2019-0561
Abstract
The main purpose of this work is to evaluate the effective shear modulus in flexible composites, with fibers arranged perpendicularly to shear load, in simple shear state at linear elastic regime. This study focuses on evaluating the effect that different parameters, related to fibers, have on effective shear modulus such as: height, radius of gyration, volume fraction and cross-sectional area. To investigate that, this work uses numerical simulations to calculate the effective shear modulus for different fibers patterns, and by comparing the collected data it is possible to identify the magnitude that each parameter has in the composite modulus. Also, if the same composite has its fibers arranged longitudinally to shear force, the effective shear modulus obtained becomes similar to the modulus obtained in pure shear state, mainly because fibers are not subject to internal tensile forces. Considering that, some data for longitudinally arranged fibers composites are calculated, and they are compared to Reuss model to validate boundary conditions used in simulations. The obtained results show that parameters such as height and cross-sectional shape of fibers have a huge impact on effective shear modulus of a composite and must be accounted in future studies that aims to model this material.
Keywords
Flexible composites, Effective shear modulus, simple shear, Unidirectional composite
