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“Finite-Element” Displacement Fields Analysis from Digital Images: Application to Portevin–Le Châtelier Bands

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Abstract

A new methodology is proposed to estimate displacement fields from pairs of images (reference and strained) that evaluates continuous displacement fields. This approach is specialized to a finite-element decomposition, therefore providing a natural interface with a numerical modeling of the mechanical behavior used for identification purposes. The method is illustrated with the analysis of Portevin–Le Châtelier bands in an aluminum alloy sample subjected to a tensile test. A significant progress with respect to classical digital image correlation techniques is observed in terms of spatial resolution and uncertainty.

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Authors and Affiliations

  1. LMT-Cachan, ENS de Cachan/CNRS-UMR 8535/, Université Paris 6, 61 avenue du Président Wilson, F-94235, Cachan Cedex, France

    G. Besnard & F. Hild

  2. Unité Mixte CNRS/Saint-Gobain Surface du Verre et Interfaces 39 quai Lucien Lefranc, F-93303, Aubervilliers Cedex, France

    G. Besnard & S. Roux

Authors
  1. G. Besnard
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  2. F. Hild
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  3. S. Roux
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Correspondence to F. Hild.

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Besnard, G., Hild, F. & Roux, S. “Finite-Element” Displacement Fields Analysis from Digital Images: Application to Portevin–Le Châtelier Bands. Exp Mech 46, 789–803 (2006). https://doi.org/10.1007/s11340-006-9824-8

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  • DOI: https://doi.org/10.1007/s11340-006-9824-8

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