Controlled crack shapes for indentation fracture of soda-lime glass

Journal Article · Tue Dec 31 23:00:00 EST 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1992.tb05618.x· OSTI ID:6981804

Smith, S M; Scattergood, R O ^[1]

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1. North Carolina State Univ., Raleigh, NC (United States). Dept. of Materials Science and Engineering

Radial cracks for indented soda-lime glass aged in distilled water were highly elliptical because of truncation by lateral cracks. Indentation in silicone oil minimized radial/lateral crack interaction but still produced cracks having nominally constant ellipticity during bend testing. Analysis of applied stress/indentation crack length data using stress intensity factors based on half-penny crack shape resulted in apparent R-curve behavior and/or overestimation of the fracture toughness. Incorporation of elliptical shape factors eliminated the R-curve behavior and reduced measured toughness to near the accepted value for soda-lime glass.

• DOE Contract Number: FG05-84ER45115
• OSTI ID: 6981804
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 75:9; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CRACK PROPAGATION
CRACKS
FRACTURE PROPERTIES
GLASS
MECHANICAL PROPERTIES
SHAPE