Role of fiber stitching in eliminating transverse fracture in cross-ply ceramic composites
- Harvard Univ., Cambridge, MA (United States). Div. of Applied Sciences
A theoretical study of the feasibility of using fiber stitching to prevent transverse matrix cracking in cross-ply ceramic composites is reported. The prototype problem solved is a curved composite beam subject to pure bending (the C-specimen), which develops a transverse tensile stress {sigma}{sub 0} acting across its circumferential midplane. Fiber stitches normal to this plane bridge a circumferential matrix crack lying along the midplane of the specimen. Results are presented for the energy release rate of this matrix crack as a function of a nondimensional parameter characterizing the fiber stitches. Sufficiently large values of this parameter ensure the applicability of the classical ACK (Aveston, Cooper and Kelly) limit for a steady-state matrix crack subject to {sigma}{sub 0}. The results obtained can be used to choose the level of stitching such that transverse matrix cracking will be excluded.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 182671
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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