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Accurate measurement of high strain gradients in micro-strain applications with 2D digital image correlation

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Abstract
The determination of strain fields based on displacements obtained via single camera digital image correlation (2D 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
MOTION, SHEET-METAL

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MLA
Lava, Pascal, et al. “Accurate Measurement of High Strain Gradients in Micro-Strain Applications with 2D Digital Image Correlation.” OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012), SHAKER PUBLISHING BV, 2013, pp. 213–21.
APA
Lava, P., Van Paepegem, W., Coppieters, S., De Baere, I., & Debruyne, D. (2013). Accurate measurement of high strain gradients in micro-strain applications with 2D digital image correlation. OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012), 213–221. Maastricht, The Netherlands: SHAKER PUBLISHING BV.
Chicago author-date
Lava, Pascal, Wim Van Paepegem, Sam Coppieters, Ives De Baere, and Dimitri Debruyne. 2013. “Accurate Measurement of High Strain Gradients in Micro-Strain Applications with 2D Digital Image Correlation.” In OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012), 213–21. Maastricht, The Netherlands: SHAKER PUBLISHING BV.
Chicago author-date (all authors)
Lava, Pascal, Wim Van Paepegem, Sam Coppieters, Ives De Baere, and Dimitri Debruyne. 2013. “Accurate Measurement of High Strain Gradients in Micro-Strain Applications with 2D Digital Image Correlation.” In OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012), 213–221. Maastricht, The Netherlands: SHAKER PUBLISHING BV.
Vancouver
1.
Lava P, Van Paepegem W, Coppieters S, De Baere I, Debruyne D. Accurate measurement of high strain gradients in micro-strain applications with 2D digital image correlation. In: OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012). Maastricht, The Netherlands: SHAKER PUBLISHING BV; 2013. p. 213–21.
IEEE
[1]
P. Lava, W. Van Paepegem, S. Coppieters, I. De Baere, and D. Debruyne, “Accurate measurement of high strain gradients in micro-strain applications with 2D digital image correlation,” in OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012), Antwerp, Belgium, 2013, pp. 213–221.
@inproceedings{4107282,
  abstract     = {{The determination of strain fields based on displacements obtained via single camera digital image correlation (2D 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.}},
  author       = {{Lava, Pascal and Van Paepegem, Wim and Coppieters, Sam and De Baere, Ives and Debruyne, Dimitri}},
  booktitle    = {{OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012)}},
  isbn         = {{9789042304192}},
  keywords     = {{MOTION,SHEET-METAL}},
  language     = {{eng}},
  location     = {{Antwerp, Belgium}},
  pages        = {{213--221}},
  publisher    = {{SHAKER PUBLISHING BV}},
  title        = {{Accurate measurement of high strain gradients in micro-strain applications with 2D digital image correlation}},
  year         = {{2013}},
}

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