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Viscoelastic response of a unidirectional composite containing two viscoelastic constituents

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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.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Wyoming, 82070, Laramie, WY

    David E. Walrath (Assistant Professor)

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  1. David E. Walrath
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Walrath, D.E. Viscoelastic response of a unidirectional composite containing two viscoelastic constituents. Experimental Mechanics 31, 111–117 (1991). https://doi.org/10.1007/BF02327561

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  • DOI: https://doi.org/10.1007/BF02327561

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