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Correlation between long and short crack R-curves in alumina using the crack opening displacement and fracture mechanical weight function approach

Fett, Theo and Munz, D. and Seidel, Jürgen and Stech, Martin and Rödel, Jürgen (1996):
Correlation between long and short crack R-curves in alumina using the crack opening displacement and fracture mechanical weight function approach.
In: Journal of the American Ceramic Society, pp. 1189-1196, 79, (5), [Online-Edition: http://dx.doi.org/10.1111/j.1151-2916.1996.tb08571.x],
[Article]

Abstract

Both fine grain sized and coarse grain sized alumina has been used as a model material to correlate short crack R-curves by the surface-flaw-in-flexure method with long crack R-curves from a compact tension specimen. The analysis has been made using the crack opening displacement from long cracks combined with the appropriate weight function to compute the crack closure stresses by crack bridging as a function of crack opening displacement. Then the long crack R-curve, the short crack curve, as well as the crack opening displacement for short cracks are computed, The agreement with the experimental data is within an absolute value of about 0.3 MPa root m and attributed to uncertainties in determining the crack tip toughness and effects due to subcritical crack growth.

Item Type: Article
Erschienen: 1996
Creators: Fett, Theo and Munz, D. and Seidel, Jürgen and Stech, Martin and Rödel, Jürgen
Title: Correlation between long and short crack R-curves in alumina using the crack opening displacement and fracture mechanical weight function approach
Language: English
Abstract:

Both fine grain sized and coarse grain sized alumina has been used as a model material to correlate short crack R-curves by the surface-flaw-in-flexure method with long crack R-curves from a compact tension specimen. The analysis has been made using the crack opening displacement from long cracks combined with the appropriate weight function to compute the crack closure stresses by crack bridging as a function of crack opening displacement. Then the long crack R-curve, the short crack curve, as well as the crack opening displacement for short cracks are computed, The agreement with the experimental data is within an absolute value of about 0.3 MPa root m and attributed to uncertainties in determining the crack tip toughness and effects due to subcritical crack growth.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 79
Number: 5
Uncontrolled Keywords: STRESS-INTENSITY FACTOR; ELLIPTICAL SURFACE CRACKS; RESISTANCE; BEHAVIOR; CERAMICS; SPECIMENS; TOUGHNESS; GROWTH; FLAWS
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Fachbereich Materialwissenschaft (1999 aufgegangen in 11 Fachbereich Material- und Geowissenschaften)
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 19 Nov 2008 16:00
Official URL: http://dx.doi.org/10.1111/j.1151-2916.1996.tb08571.x
Identification Number: doi:10.1111/j.1151-2916.1996.tb08571.x
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