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Extended digital image correlation with crack shape optimization

Abstract : The methodology of eXtended Finite Element Method is applied to the measurement of displacements through digital image correlation. An algorithm, initially based on a finite element decomposition of displacement fields, is extended to benefit from discontinuity and singular enrichments over a suited subset of elements. This allows one to measure irregular displacements encountered, say, in cracked solids, as demonstrated both on artificial examples and experimental case studies. Moreover, an optimization strategy for the support of the discontinuity enables one to adjust the crack path configuration to reduce the residual mismatch, and hence to be tailored automatically to a wavy or irregular crack path.
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Contributor : François Hild <>
Submitted on : Tuesday, December 18, 2007 - 11:15:31 PM
Last modification on : Wednesday, March 24, 2021 - 1:58:08 PM
Long-term archiving on: : Thursday, September 27, 2012 - 11:50:23 AM


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Julien Réthoré, François Hild, Stéphane Roux. Extended digital image correlation with crack shape optimization. International Journal for Numerical Methods in Engineering, Wiley, 2008, 73 (2), pp.248-272. ⟨10.1002/nme.2070⟩. ⟨hal-00199378⟩



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