Matrix fatigue crack development in a notched continuous fiber SCS-6/Ti-15-3 compositeIn this study the extensive matrix fatigue cracking that has been observed in notched SCS-6/Ti-15-3 composites is investigated. Away from the notch uniform spacing of the fatigue cracks develops. Closer to the notch, fiber-matrix debonding which occurs increases the crack spacing. Crack spacing and debond length determined from shear-lag cylinder models compare favorably with experimental observations. Scanning electron microscope (SEM) fractography showed that the principal fatigue crack initiation occurred around the zero degree fibers. Interface failure in the 90 degree plies does not lead to the development of the primary fatigue cracking.
Document ID
19920069387
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hillberry, B. M. (NASA Langley Research Center Hampton, VA, United States)
Johnson, W. S. (NASA Langley Research Center Hampton, VA, United States)