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The fracture mechanics community may be interested in a new evaluation of a J-Integral for a fundamental geometry: an elliptical hole in a perfectly plastic material under the Tresca yield condition for plane stress loading conditions. The analysis is exact and involves only elementary functions. This makes the problem suitable as a classroom example or as a homework problem for a graduate level course in fracture mechanics. See J. Elasticity (2008) 92:217-226. http://www.springerlink.com/content/102932/
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