Rödel, Jürgen ; Kelly, James F. ; Lawn, Brian R. (1990)
In Situ Measurements of Bridged Crack Interfaces in the Scanning Electron Microscope.
In: Journal of the American Ceramic Society, 73 (11)
doi: 10.1111/j.1151-2916.1990.tb06454.x
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A device for in situ SEM examination of crack propagation during loading of compact tension specimens is described, with a specific demonstration on an alumina ceramic. The device facilitates direct qualitative observations of the inception and subsequent frictional pullout of grain-localized bridges at the crack interface. Quantitative data on the bridging mechanism are obtained from measurements of the crack-opening displacements behind the crack tip. The crack profile is found to be closer to linear than parabolic at the bridged interface. Deconvolution of these crack-opening data allow for an evaluation of the closure tractions operative at the crack walls within the bridging zone, and thence the R-curve.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 1990 |
| Autor(en): | Rödel, Jürgen ; Kelly, James F. ; Lawn, Brian R. |
| Art des Eintrags: | Bibliographie |
| Titel: | In Situ Measurements of Bridged Crack Interfaces in the Scanning Electron Microscope |
| Sprache: | Englisch |
| Publikationsjahr: | November 1990 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 73 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1111/j.1151-2916.1990.tb06454.x |
| Kurzbeschreibung (Abstract): | A device for in situ SEM examination of crack propagation during loading of compact tension specimens is described, with a specific demonstration on an alumina ceramic. The device facilitates direct qualitative observations of the inception and subsequent frictional pullout of grain-localized bridges at the crack interface. Quantitative data on the bridging mechanism are obtained from measurements of the crack-opening displacements behind the crack tip. The crack profile is found to be closer to linear than parabolic at the bridged interface. Deconvolution of these crack-opening data allow for an evaluation of the closure tractions operative at the crack walls within the bridging zone, and thence the R-curve. |
| Freie Schlagworte: | scanning electron microscopy; cracks; bridging; pullout; toughness |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 13 Jun 2012 12:20 |
| Letzte Änderung: | 05 Mär 2013 10:01 |
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