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Generalized Orowan‐Petch Plot for Brittle Fracture
Author(s) -
Zimmermann André,
Rödel Jürgen
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02657.x
Subject(s) - materials science , brittleness , stress intensity factor , brittle fracture , fracture (geology) , structural engineering , composite material , fracture mechanics , mechanics , engineering , physics
The fracture of brittle solids is considered to be based on a defect configuration consisting of a stress concentrator, in our case a hemispherical pore, and a starter crack, in our case either a semicircular crack, a circular crack, or a circumferential crack. Computation of the stress field, application of the relevant weight functions, and an averaging scheme based on the assumption of a virtual crack increment provides stress intensity factors for all defect configurations considered. A normalization scheme yields a generalized version of the Orowan‐Petch plot in the form of a normalized strength to normalized defect size relationship.