SEDL / STP / STP580-EB / STP32332S

Fatigue, Creep, and Impact Resistance of Aramid Fiber Reinforced Composites

Miner, LH
Technical marketing representative, technical marketing specialist, and senior research engineer, E. I. du Pont de Nemours & Co., Inc., Wilmington, Del.

Wolffe, RA
Technical marketing representative, technical marketing specialist, and senior research engineer, E. I. du Pont de Nemours & Co., Inc., Wilmington, Del.

Zweben, CH
Technical marketing representative, technical marketing specialist, and senior research engineer, E. I. du Pont de Nemours & Co., Inc., Wilmington, Del.

Pages: 11    Published: Jan 1975

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Abstract

Kevlar^® 49 a high-strength, high-modulus, low-density organic fiber has gained significant acceptance as a weight-reducing replacement for E-glass in aircraft applications and for S-glass in filament-wound missile components. New end-use applications require a better understanding of the static and dynamic fatigue and impact resistance of these composites. The tension-tension fatigue life of both unidirectional fiber and fabric-reinforced laminates was greater than that of comparable glass-reinforced composites. The creep rate under continuous tensile stress was comparable to that of glass composites. The ball-drop impact resistance of Kevlar 49 fabric laminate-faced sandwich panels was dependent on fabric weave construction and number of face sheet plies. This relationship was significantly different for sandwich beams having glass-reinforced facings.