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Planar Cracks Running along Piecewise Linear Paths

M. A. Herrero, G. E. Oleaga and J. J. L. Velázquez
Proceedings: Mathematical, Physical and Engineering Sciences
Vol. 460, No. 2042 (Feb. 8, 2004), pp. 581-601
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/4143139
Page Count: 21
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Planar Cracks Running along Piecewise Linear Paths
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Abstract

Consider a crack propagating in a plane according to a loading that results in antiplane shear deformation. We show here that if the crack path consists of two straight segments making an angle φ ≠ 0 at their junction, examples can be provided for which the value of the stress-intensity factor (SIF) actually depends on the previous history of the motion. This is in sharp contrast with the rectilinear case (corresponding to φ = 0), where the SIF is known to have a local character, its value depending only on the position and velocity of the crack tip at any given time.

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