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Experimental Mechanics

, Volume 31, Issue 2, pp 111–117 | Cite as

Viscoelastic response of a unidirectional composite containing two viscoelastic constituents

  • David E. Walrath
Article

Abstract

Viscoelastic response of a unidirectional aramid fiber-reinforced epoxy was measured. Procedures to measure all five time-dependent material properties necessary to describe behavior of a transversely isotropic continuous-fiber unidirectional lamina were implemented. The Iosipescu shear method was used to measure in-plane and interlaminar shear viscoelastic response. Applicability of the Schapery single-integral nonlinear viscoelastic constitutive model to describe time-dependent mechanical behavior of a laminated composite material containing two viscoelastic phases was explored. Linear and nonlinear viscoelastic parameters for this two-viscoelastic constituent composite were measured and data summaries are presented in the paper. The time-dependent behavior of this two-viscoelastic constituent composite material was found to be complex, but the Schapery nonlinear viscoelastic model did adequately fit the response of such a composite to uniaxial applied loads.

Keywords

Viscoelastic Model Viscoelastic Response Viscoelastic Parameter Unidirectional Composite Laminate Composite Material 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Society for Experimental Mechanics, Inc. 1991

Authors and Affiliations

  • David E. Walrath
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of WyomingLaramie

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