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Fracture toughness of Si3N4 measured with short bar chevron-notched specimensThe short bar chevron-notched specimen is used to measure the plane strain fracture toughness of hot pressed Si3N4. Specimen proportions and chevron-notch angle are varied, thereby varying the amount of crack extension to maximum load (upon which K sub IC is based). The measured toughness (4.68 + or 0.19 MNm to the 3/2 power) is independent of these variations, inferring that the material has a flat crack growth resistance curve.
Document ID
19870043347
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Salem, Jonathan A.
(NASA Lewis Research Center Cleveland, OH, United States)
Shannon, John L., Jr.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Journal of Materials Science
Volume: 22
ISSN: 0022-2461
Subject Category
Nonmetallic Materials
Accession Number
87A30621
Distribution Limits
Public
Copyright
Other

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