Journal
ENGINEERING FRACTURE MECHANICS
Volume 73, Issue 9, Pages 1249-1263Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2005.12.011
Keywords
crack; stress intensity factor (SIF); fracture criterion; mixed-mode; potential energy release rate
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In order to predict the fracture direction and fracture loadings of cracked materials under the general mixed-mode state, this paper presents a new general mixed-mode brittle fracture criterion based on the concept of maximum potential energy release rate (MPERR). This criterion can be easily degraded to the pure-mode fracture criterion, and can also be reduced to the commonly accepted fracture criteria for the mixed-mode I/II state. In order to validate the proposed criterion, we have carried out the experiments with aluminium alloy specimens under various mixed-mode loading conditions. The experimental results agree well with the predictions of the proposed criterion. (c) 2006 Elsevier Ltd. All rights reserved.
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