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Damage Interaction in Composites.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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The purpose of the experimental study was to investigate the effects of foreign object damage FOD on the bending fatigue characteristics of a composite material, unidirectional boronaluminum-6061. Fatigue curves were generated for a control group and each of four levels of FOD. The composite was further characterized by static tensile, static bending, and nondestructive tests. All tests were carried out at room temperature. A similar damage and fatigue analysis was done for a titanium alloy, Ti-6Al-4V, to provide baseline data with which to compare the composite. It was concluded that the composite suffers more physical damage and a greater percentage reduction in fatigue strength than does Ti-6Al-4V for a given impact energy. Modified author abstract
APPROVED FOR PUBLIC RELEASE