Interlaminar crack growth resistances were evaluated for five different SiC fiber-reinforced ceramic matrix composites (CMCs) including three gas-turbine grade melt-infiltrated composites. Modes I and II crack growth resistances, and , were determined at ambient temperature using double cantilever beam and end notched flexure methods, respectively. The CMCs exhibited and . All the composites (except for one SiC/CAS composite) showed a rising -curve behavior either in mode I or in mode II, presumably attributed to fiber bridging (in modes I and II) and frictional constraint (mode II) in the wake region of a propagating crack. A glass fiber-reinforced epoxy polymer matrix composite showed typically two to three times greater and eight times greater , compared to the CMCs. An experimental error analysis regarding the effect of the off-the-center of a crack plane on and was also made.
Interlaminar Crack Growth Resistances of Various Ceramic Matrix Composites in Mode I and Mode II Loading
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Choi, S. R., and Kowalik, R. W. (April 2, 2008). "Interlaminar Crack Growth Resistances of Various Ceramic Matrix Composites in Mode I and Mode II Loading." ASME. J. Eng. Gas Turbines Power. May 2008; 130(3): 031301. https://doi.org/10.1115/1.2800349
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