ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 6

Methods of Determining Subcritical Crack Growth by Static Lifetime Tests with Natural and Artificial Cracks

Fett, T
Kernforschungszentrum Karlsruhe, Institut für Material- und Festkörperforschung IV, Universitat Karlsruhe, Institut fur Zuverlassigkeit und Schadenskunde im Maschinenbau, Karlsruhe,

Munz, D
Kernforschungszentrum Karlsruhe, Institut für Material- und Festkörperforschung IV, Universitat Karlsruhe, Institut fur Zuverlassigkeit und Schadenskunde im Maschinenbau, Karlsruhe,

(Received 19 September 1990; accepted 8 May 1991)

Abstract

Different procedures are described for evaluating v-KI curves of subcritical crack growth from lifetime measurements under static load for natural and artificial cracks. The lifetimes for a 99.6% A1₂O₃ are evaluated as an example of application. Results for small natural cracks and artificial Knoop cracks are compared, and a rather good agreement of the v-K curves is observed.

Keywords:
subcritical crack growth, ceramic materials, aluminum oxide, fracture mechanics

Paper ID: JTE12609J
DOI: 10.1520/JTE12609J
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