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Digital image correlation using Newton-Raphson method of partial differential correction

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Abstract

Digital image correlation is finding wider use in the field of mechanics. One area of weakness in the current technique is the lack of available displacement gradient terms. This technique, based on a coarse-fine search method, is capable of calculating the gradients. However the speed at which it does so has prevented widespread use. Presented in this paper is the development and limited experimental verification of a method which can determine displacements and gradients using the Newton-Raphson method of partial corrections. It will be shown that this method is accurate in determining displacements and certain gradients, while using significantly less CPU time than the current coarse-fine search method.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of South Carolina, 29208, Columbia, SC

    H. A. Bruck (Graduate Student), S. R. McNeill (Assistant Professor), M. A. Sutton (Associate Professor) & W. H. Peters III (Professor)

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  1. H. A. Bruck
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  2. S. R. McNeill
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  3. M. A. Sutton
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  4. W. H. Peters III
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Bruck, H.A., McNeill, S.R., Sutton, M.A. et al. Digital image correlation using Newton-Raphson method of partial differential correction. Experimental Mechanics 29, 261–267 (1989). https://doi.org/10.1007/BF02321405

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  • DOI: https://doi.org/10.1007/BF02321405

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