Journal Published Online: 01 November 1975
Volume 3, Issue 6

Tensile Creep of Angle-Plied Boron/Epoxy Laminates

CODEN: JTEVAB

Abstract

Tensile creep tests were performed at 75°F (24°C) and 300°F (149°C) on 26 specimens cut from ±30-deg and ±45-deg laminates of boron/epoxy composite material to characterize the creep behavior of these materials. A linear viscoelastic laminate theory proposed by McQuillen was compared with the experimental data for the tests run at 75°F (24°C). The predicted creep strains differed greatly from the measured values, indicating that the linear theory is not applicable to laminates with these filament orientations. A general creep equation of the form ε = mtn was fitted to the experimental data with excellent correlation. The stress exponents was fitted to the experimental data with excellent correlation. The stress exponents m varied from 1.79 to 5.17 for the four series of tests, thus characterizing the nonlinear behavior of boron/epoxy laminates with these filament orientations.

Author Information

Chwirut, DJ
National Bureau of Standards, Washington, D.C.
Pages: 7
Price: $25.00
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Stock #: JTE11700J
ISSN: 0090-3973
DOI: 10.1520/JTE11700J