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v-K-data for silica from lifetime measurements under step-shaped loading history

Fuller, E.; Fett, T.; Schell, K.G.; Hoffmann, M.J.; Wiederhorn, S.M.

Abstract:
Different methods were applied so far in order to determine subcritical crack growth for silica. Mostly, fracture mechanics standard tests with macro cracks were used for this purpose. In this report, we evaluated the subcritical crack growth curves from lifetime tests on silica bending specimens. The survivors were then tested under increased stress. Crack growth rates down to v=10$^{-12}$m/s were reached in this way. In the plot of v=f(K/K$_{Ic}$) slight material differences could be eliminated and suitable agreement with macro-crack results by Wiederhorn and Bolz [1] on DCB-specimens and Michalske et al. [2] on DCDC-specimens could be stated.

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Volltext §
DOI: 10.5445/IR/1000121100
Veröffentlicht am 09.07.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Keramische Werkstoffe und Technologien (IAM-KWT)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2020
Sprache Deutsch
Identifikator ISSN: 2194-1629
KITopen-ID: 1000121100
Verlag KIT, Karlsruhe
Umfang VI, 7 S.
Serie KIT Scientific Working Papers ; 143
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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