Porz, Lukas ; Sai, Wei ; Zhao, Jiamin ; Patterson, Eric A. ; Liu, Bin (2015)
Characterizing Brittle Fracture by Modeling Crack Deflection Angles
from the Microstructure.
In: Journal of the American Ceramic Society, 98 (12)
doi: 10.1111/jace.13822
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
This study introduces a simple analytical model for fracture toughness to bridge the length scales from grain size to bulk thickness by assembling a virtual crack path from the angles recorded on an unfractured microstructure, which is a great challenge in fracture mechanics due to the high geometrical complexity. Good agreement is found between a crack deflection angle distribution measured from 5764 crack segments and the prediction by the model and the possible influence of residual stress is quasi quantitatively discussed. A total of 7.4% of the crack segments observed acted as crack bridges, while 7.3% was predicted by the model. A quantification of how high an angle needs to be to turn crack deflection into crack bridging is given. The ratio of fracture toughness from grain boundary to grain, G1c(gb)/G1c(g), was measured indirectly from all samples to be between 0.3 and 0.35.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Porz, Lukas ; Sai, Wei ; Zhao, Jiamin ; Patterson, Eric A. ; Liu, Bin |
| Art des Eintrags: | Bibliographie |
| Titel: | Characterizing Brittle Fracture by Modeling Crack Deflection Angles from the Microstructure |
| Sprache: | Englisch |
| Publikationsjahr: | 19 Dezember 2015 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 98 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1111/jace.13822 |
| Kurzbeschreibung (Abstract): | This study introduces a simple analytical model for fracture toughness to bridge the length scales from grain size to bulk thickness by assembling a virtual crack path from the angles recorded on an unfractured microstructure, which is a great challenge in fracture mechanics due to the high geometrical complexity. Good agreement is found between a crack deflection angle distribution measured from 5764 crack segments and the prediction by the model and the possible influence of residual stress is quasi quantitatively discussed. A total of 7.4% of the crack segments observed acted as crack bridges, while 7.3% was predicted by the model. A quantification of how high an angle needs to be to turn crack deflection into crack bridging is given. The ratio of fracture toughness from grain boundary to grain, G1c(gb)/G1c(g), was measured indirectly from all samples to be between 0.3 and 0.35. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 04 Jan 2016 16:30 |
| Letzte Änderung: | 23 Okt 2020 09:16 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum