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Impact of Lens Distortions on Strain Measurements Obtained with Digital Image Correlation

  • P. Lava
  • W. Van Paepegem
  • S. Coppieters
  • I. De Baere
  • D. Debruyne
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

The determination of strain fields based on displacements obtained via DIC at the micro-strain level is still a cumbersome task. In particular when high-strain gradients are involved, e.g. in composite materials with multidirectional fibre reinforcement, uncertainties in the experimental setup and errors in the derivation of the displacement fields can substantially hamper the strain identification process. In this contribution, the aim is to investigate the impact of lens distortions on strain measurements. To this purpose, we first perform pure rigid body motion experiments, revealing the importance of precise correction of lens distortions. Next, a uni-axial tensile test on a textile composite with spatially varying high strain gradients is performed, resulting in very accurate determined strains along the fibers of the material.

Keywords

Digital Image Correlation Camera Calibration Lens Distortion Distortion Correction Radial Distortion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Society for Experimental Mechanics, Inc. 2013

Authors and Affiliations

  • P. Lava
    • 1
  • W. Van Paepegem
    • 2
  • S. Coppieters
    • 1
  • I. De Baere
    • 2
  • D. Debruyne
    • 3
  1. 1.Department of Mechanical EngineeringAssociation K.U. Leuven, Catholic University College GhentGentBelgium
  2. 2.Department of Materials Science and EngineeringGhent UniversityGentBelgium
  3. 3.Department MTMKatholieke Universiteit LeuvenLeuvenBelgium

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