Transverse Cracking in a Fiber Reinforced Ceramic Matrix Composite
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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The purpose of this study was to investigate the transverse cracking behavior of a fiber reinforced ceramic matrix composite. The major objectives were to determine the crack initiation stress and the minimum transverse crack spacing for different cross-ply lay-ups of SiC1723, to provide explanation for the differences in the performance of the lay-ups, and to compare the test results to available theoretical models and to other composite systems. The thickness of the transverse ply was found to have a great effect on the transverse cracking behavior of laminates. The saturation crack spacing decreased as the transverse ply thickness was decreased. Classical laminate theory was used to predict crack initiation stresses and modulus of elasticity. A crack spacing theory based on shear lag analysis was applied. Comparisons were made to glassepoxy and graphiteepoxy systems.
- Laminates and Composite Materials