Effects of thermal and environmental exposure on the mechanical properties of graphite/polyimide composites /
by M.P. Hanson and T.T. Serafini.

Description

Main Author

Hanson, M. P.

Related Names

Serafini, T. T.
United States. National Aeronautics and Space Administration.
Lewis Research Center.

Language(s)

English

Published

Washington, D.C. : National Aeronautics and Space Administration, 1971.

Subjects

Temperature.
Graphite fibers.
Composite materials > Composite materials / Effect of environment on.
Polyimides.

Summary

Composites were exposed in circulating and static air environments up to 589 K for a maximum of 1000 hours. Composites of HT-S, HM-S, Thornel 50S, and Fortafil 5-Y fiber and a new addition type polyimide resin were laminated in a matched-die mold. Flexural strengths, flexural modulus, and interlaminar shear strengths were determined at 297, 533, and 598 K after various durations of exposure. Composite and fiber weight loss characteristics were determined by isothermal gravimetric analysis in air. Properties of composites exposed and tested at the environment temperatures were compared with those determined under short-term exposure. A new short beam interlaminar shear fixture is described. Environmental effects of long-term ambient temperature exposure on the elevated temperature mechanical properties of graphite/polyimide composites are presented.

Note

Prepared by Lewis Research Center.
N72-13494.

Physical Description

13 p. : ill. ; 28 cm.

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