SYMPOSIA PAPER Published: 01 January 1974
STP35498S

Torsional Fatigue Behavior of Unidirectional Resin Matrix Composites

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Torsional fatigue data are presented for boron/epoxy and graphite/epoxy composites. The failure criterion for the tests is shear modulus reduction. The modulus reduction is shown to be caused by cracks that occur in resin-rich portions of the composites. Resistance to torsional fatigue is found to increase as fiber distribution becomes more uniform and as interfiber distance is decreased.

Author Information

Novak, RC
United Aircraft Research Laboratories, East Hartford, Conn.
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Details
Developed by Committee: D30
Pages: 345–360
DOI: 10.1520/STP35498S
ISBN-EB: 978-0-8031-4639-6
ISBN-13: 978-0-8031-0308-5