Cracking resistance of silicon carbide composites by single- and double-notched specimen techniques

Nozawa, Takashi; Tanigawa, Hiroyasu

International Journal of Applied Ceramic Technology, 7(3), p.304 - 315, 2010/05

https://doi.org/10.1111/j.1744-7402.2009.02469.x

To investigate the crack propagation behavior of quasi-ductile composites, this paper aims to evaluate the fracture resistance by the single-edge notched-bend test and the double notch tensile test. With the preliminary analysis, a new methodology to determine the fracture resistance has been developed based on the non-linear fracture mechanics, separately discussing the effect of irreversible energies. By adopting this method to various SiC/SiC composites, (1) notch insensitivity, (2) no significant size effect, and (3) superior crack tolerance were identified for both test types, depending on the fiber/matrix interfacial bond strength.