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Use of an Advanced Shear-Lag Model to Obtain the Optimum Internal Damping in Short-Fiber Composites

[+] Author and Article Information
P. Hajela, C.-J. Shih

Aerospace Engineering, Mechanics and Engineering Science, University of Florida, Gainesville FL 32611

Appl. Mech. Rev 42(11S), S93-S99 (Nov 01, 1989) doi:10.1115/1.3152413 History: Online June 03, 2009

Abstract

The present paper examines a modified shear-lag model for predicting the stress distribution in short fiber reinforced composite materials. The model assumes perfect bonding between the fiber and the matrix materials, and allows for the matrix material to partially sustain axial loads. The stress distribution obtained on the basis of this model is used to predict the internal damping characteristics of the composite material. These characteristics are a function of both the material properties and the geometrical layout of the composite, and are optimized by combining the analytical model with a nonlinear programming optimization algorithm. Representative numerical results are obtained for glass–epoxy and graphite–epoxy composites

Copyright © 1989 by The American Society of Mechanical Engineers
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