Tensile creep of angle-piled boron/epoxy laminates
Journal Article
·
· J. Test. Eval., v. 3, no. 6, pp. 442-448
OSTI ID:4008497
Tensile creep tests were performed at 75 and 300$sup 0$F 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$sup 0$F. 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 epsilon = k sigma/sup m/t/sup n/ 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. 9 figures, 4 tables. (auth)
- Research Organization:
- National Bureau of Standards, Washington, DC
- NSA Number:
- NSA-33-026843
- OSTI ID:
- 4008497
- Journal Information:
- J. Test. Eval., v. 3, no. 6, pp. 442-448, Journal Name: J. Test. Eval., v. 3, no. 6, pp. 442-448; ISSN JTEVA
- Country of Publication:
- United States
- Language:
- English
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