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Fracture toughness of fiber-reinforced glass ceramic and ceramic matrix compositesA fracture mechanics investigation of 2D woven Nicalon SiC/SiC and Nicalon SiC/LAS has been undertaken. An energy approach has been adopted to characterize and quantify the fracture properties of these materials. Chevron-notched bend specimens were tested in an edgewise configuration in which the crack propagated perpendicular to the ply direction. R-curves were obtained from repeated loading and unloading of specimens using several methods of data reduction. Values correconding to the plateau regions of the R-curves were taken as steady-state crack-growth resistance. These ranged from 37 to 63 kJ/sq m for 2D-SiC/LAS and 2.6 to 2.8 kJ/sq m for 2D-SiC/SiC composites.
Document ID
19910072309
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Stull, Kevin R.
(Delaware Univ. Newark, DE, United States)
Parvizi-Majidi, A.
(Delaware, University Newark, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1991
Publication Information
Publication: Ceramic Engineering and Science Proceedings
Volume: 12
ISSN: 0196-6219
Subject Category
Composite Materials
Accession Number
91A56932
Distribution Limits
Public
Copyright
Other

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