Abstract
The purpose of this paper is to characterize the fatigue damage tolerance behavior of unidirectionally continuous-fiber-reinforced metal matrix composites. The fatigue crack growth tests were conducted on silicon-carbide-fiber unidirectionally reinforced titanium alloy matrix composite SiCCVD/Ti-15-3 using a single-edge-notched(SEN) specimen. The analysis of the effective stress intensity factor at the fatigue crack tip with reinforcement fiber bridging was also carried out on the basis of the crack closure model. It was found that there is little difference in fatigue crack growth resistance between L- and T-orientations.
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