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Experimental Mechanics

, Volume 55, Issue 9, pp 1657–1668 | Cite as

CAD-based Displacement Measurements with Stereo-DIC

Principle and First Validations
  • John-Eric Dufour
  • Benoît Beaubier
  • François Hild
  • Stéphane Roux
Article

Abstract

A new displacement measurement technique is proposed in a stereovision setup, which uses the object of interest as the support of the correlation process. This procedure leads to a global approach to stereocorrelation. The method is presented in its general formulation and is then particularized to the case of non uniform rational B-splines (NURBS). The displacement field is directly measured as a 3D field expressed in a NURBS basis consistent with the existing geometric model. The kinematic measurements are validated against prescribed displacements of a machined Bézier patch. The feasibility in an industrial context is shown with the analysis of 3D displacement fields of a 2- m2 automotive roof panel during a welding operation.

Keywords

Stereocorrelation DIC Freeform surfaces Displacement Uncertainty 

Notes

Acknowledgments

This work was partly supported by PSA-Peugeot-Citroën, by a grant from Région Île-de-France, and under the PRC Composites, French research project funded by DGAC, involving SAFRAN Group, ONERA and CNRS.

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Copyright information

© Society for Experimental Mechanics 2015

Authors and Affiliations

  • John-Eric Dufour
    • 1
    • 3
  • Benoît Beaubier
    • 1
    • 2
  • François Hild
    • 1
  • Stéphane Roux
    • 1
  1. 1.LMT-Cachan, ENS Cachan / CNRS / Université Paris SaclayCachan CedexFrance
  2. 2.PSA Peugeot Citroën, Centre Technique de Vélizy BVélizy VillacoublayFrance
  3. 3.SAFRAN Snecma VillarocheReauFrance

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