Fatigue of Crossply Carbon Fiber Composites at Cryogenic Temperatures
This paper describes the static and the fatigue properties of crossply carbon fiber composites under tensile and torsional threshold loading at 77 K. Composites with thermoplastic and duroplastic matrices have been tested. In most S-N diagrams there are ranges which are matrix- or fiber-dominated. The fatigue endurance limit for most carbon fiber composites is matrix dominated. Damage accumulation is analyzed by modulus degradation and observation of cracks.
KeywordsEpoxy Matrix Static Strength Crack Density Transverse Crack Fatigue Cycling
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