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Role of Fiber Stitching in Eliminating Transverse Fracture in Cross‐Ply Ceramic Composites
Author(s) -
Lu TianJian,
Hutchinson John W.
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08396.x
Subject(s) - image stitching , composite material , materials science , transverse plane , ceramic matrix composite , fiber , ultimate tensile strength , bending , ceramic , composite number , matrix (chemical analysis) , fracture (geology) , stress (linguistics) , structural engineering , physics , engineering , optics , linguistics , philosophy
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 σ 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 σ 0 . The results obtained can be used to choose the level of stitching such that transverse matrix cracking will be excluded.