Lathabai, S. ; Rödel, Jürgen ; Dabbs, T. ; Lawn, B. R. (1991)
Fracture mechanics model for subthreshold indentation flaws: II: Non-equilibrium fracture.
In: Journal of Materials Science, 26 (9)
doi: 10.1007/BF01130175
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In Part II of this two-part study we extend the shear-fault-microcrack model to non-equilibrium fracture, to allow for rate effects in the critical instability configurations in chemically interactive environments. The ldquocalibratedrdquoK-fields of Part I are combined with independently evaluated crack velocity functions to determine kinetic conditions for microcrack extension. The analysis enables evaluation of (i) a time delay in radial crack pop-in from a subthreshold flaw; (ii) a time dependence in the strength characteristics, in both the subthreshold and postthreshold domains. Comparisons with delayed pop-in and strength-stressing-rate literature data for silicate glasses in moist environments indicate that the analysis is capable of quantitative predictions of kinetic characteristics. In the strength data, the model accounts for the relatively high magnitudes, scatter and fatigue susceptibilities in the subthreshold region.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 1991 |
| Autor(en): | Lathabai, S. ; Rödel, Jürgen ; Dabbs, T. ; Lawn, B. R. |
| Art des Eintrags: | Bibliographie |
| Titel: | Fracture mechanics model for subthreshold indentation flaws: II: Non-equilibrium fracture |
| Sprache: | Englisch |
| Publikationsjahr: | Mai 1991 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Materials Science |
| Jahrgang/Volume einer Zeitschrift: | 26 |
| (Heft-)Nummer: | 9 |
| DOI: | 10.1007/BF01130175 |
| Kurzbeschreibung (Abstract): | In Part II of this two-part study we extend the shear-fault-microcrack model to non-equilibrium fracture, to allow for rate effects in the critical instability configurations in chemically interactive environments. The ldquocalibratedrdquoK-fields of Part I are combined with independently evaluated crack velocity functions to determine kinetic conditions for microcrack extension. The analysis enables evaluation of (i) a time delay in radial crack pop-in from a subthreshold flaw; (ii) a time dependence in the strength characteristics, in both the subthreshold and postthreshold domains. Comparisons with delayed pop-in and strength-stressing-rate literature data for silicate glasses in moist environments indicate that the analysis is capable of quantitative predictions of kinetic characteristics. In the strength data, the model accounts for the relatively high magnitudes, scatter and fatigue susceptibilities in the subthreshold region. |
| 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 13:37 |
| Letzte Änderung: | 05 Mär 2013 10:01 |
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