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TECHNICAL PAPERS

Analytical Expressions for the Relaxation Moduli of Linear Viscoelastic Composites With Periodic Microstructure

[+] Author and Article Information
R. Luciano

University of Cassino, via Zamosh 43, Cassino, Italy

E. J. Barbero

West Virginia University, Morgantown, WV 26506-6106

J. Appl. Mech 62(3), 786-793 (Sep 01, 1995) (8 pages) doi:10.1115/1.2897015 History: Received March 16, 1994; Revised December 02, 1994; Online October 30, 2007

Abstract

In this paper the viscoelastostatic problem of composite materials with periodic microstructure is studied. The matrix is assumed linear viscoelastic and the fibers elastic. The correspondence principle in viscoelasticity is applied and the problem in the Laplace domain is solved by using the Fourier series technique and assuming the Laplace transform of the homogenization eigenstrain piecewise constant in the space. Formulas for the Laplace transform of the relaxation functions of the composite are obtained in terms of the properties of the matrix and the fibers and in function of nine triple series which take into account the geometry of the inclusions. The inversion to the time domain of the relaxation and the creep functions of composites reinforced by long fibers is carried out analytically when the four-parameter model is used to represent the viscoelastic behavior of the matrix. Finally, comparisons with experimental results are presented.

Copyright © 1995 by The American Society of Mechanical Engineers
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