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Controlled crack growth specimen for brittle systemsA pure Mode 1 fracture specimen and test procedure has been developed which provides extended, stable, through-thickness crack growth in ceramics and other brittle, nonmetallic materials. Fixed displacement loading, applied at the crack mouth, promotes stable crack extension by reducing the stored elastic strain energy. Extremely fine control of applied displacements is achieved by utilizing the Poisson's expansion of a compressively loaded cylindrical pin. Stable cracks were successfully grown in soda-lime glass and monolithic Al2O3 for lengths in excess of 2O mm without uncontrollable catastrophic failure.
Document ID
19920038475
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Calomino, Anthony M.
(NASA Lewis Research Center Cleveland, OH, United States)
Brewer, David N.
(NASA Lewis Research Center; U.S. Army, Propulsion Directorate, Cleveland OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: American Ceramic Society, Communications
Volume: 75
ISSN: 0002-7820
Subject Category
Nonmetallic Materials
Accession Number
92A21099
Distribution Limits
Public
Copyright
Other

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