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Characterization of Complex Modulus of Viscoelastic Materials Subject to Static Compression

Characterization of Complex Modulus of Viscoelastic Materials Subject to Static Compression In this paper, a procedure to estimate complex modulus of incompressibleviscoelastic materials from stiffness measurements as functions offrequency under heavy compressive pre-strain is presented together withsome results for a typical viscoelastic material. Two existing methodsare discussed which enable predictions of the complex modulus based onthe measurements as functions of frequency and pre-strain. A new moreefficient formula is proposed which obtains the modulus by combining thefrequency effects at a reference pre-strain and the pre-strain effectsat a chosen frequency, i.e., dynamic effects. This formula reflects thetrend of dynamic modulus with the static compression under theassumption that the relaxation function is dependent on the staticcompression. The relaxation function can be transformed into frequency-dependent functions, which are modified to represent the pre-strain effect at a chosen frequency. Dynamic properties of a viscoelastic material were obtained at agiven strain amplitude from 1 to 180 Hz under nine levels of compressivepre-strain and performances of the formulas are comparatively discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mechanics of Time-Dependent Materials Springer Journals

Characterization of Complex Modulus of Viscoelastic Materials Subject to Static Compression

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References (12)

Publisher
Springer Journals
Copyright
Copyright © 2001 by Kluwer Academic Publishers
Subject
Physics; Polymer Sciences; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation Materials; Mechanics
ISSN
1385-2000
eISSN
1573-2738
DOI
10.1023/A:1017996207164
Publisher site
See Article on Publisher Site

Abstract

In this paper, a procedure to estimate complex modulus of incompressibleviscoelastic materials from stiffness measurements as functions offrequency under heavy compressive pre-strain is presented together withsome results for a typical viscoelastic material. Two existing methodsare discussed which enable predictions of the complex modulus based onthe measurements as functions of frequency and pre-strain. A new moreefficient formula is proposed which obtains the modulus by combining thefrequency effects at a reference pre-strain and the pre-strain effectsat a chosen frequency, i.e., dynamic effects. This formula reflects thetrend of dynamic modulus with the static compression under theassumption that the relaxation function is dependent on the staticcompression. The relaxation function can be transformed into frequency-dependent functions, which are modified to represent the pre-strain effect at a chosen frequency. Dynamic properties of a viscoelastic material were obtained at agiven strain amplitude from 1 to 180 Hz under nine levels of compressivepre-strain and performances of the formulas are comparatively discussed.

Journal

Mechanics of Time-Dependent Materials – Springer Journals

Published: Sep 1, 2001

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