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Calibration and correction procedure for quantitative out-of-plane shearography

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Abstract
Quantitative shearography applications continue to gain practical importance. However, a study of the errors inherent in shearography measurements, related to calibration of the instrument and correction of the results, is most often lacking. This paper proposes a calibration and correction procedure for the out-of-plane shearography with a Michelson interferometer. The calibration is based on the shearography measurement of known rigid-body rotations of a flat plate and accounts for the local variability of the shearing distance. The correction procedure further compensates for the variability of the sensitivity vector and separates the two out-of-plane deformation gradients when they are coupled in the measurement. The correction procedure utilizes two shearography measurements of the same experiment with distinct shearing distances. The effectiveness of the proposed calibration procedure is demonstrated in the case of a static deformation of a centrally loaded plate, where the discrepancy between experimental and finite element analysis results is minimized.
Keywords
PHASE-SHIFTING INTERFEROMETRY, SPECKLE SHEARING INTERFEROMETRY, SURFACE STRAIN-MEASUREMENT, DIGITAL SHEAROGRAPHY, COMPOSITE STRUCTURES, ALGORITHM, shearography, correction, calibration, shearing distance, sensitivity vector

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MLA
Zastavnik, Filip et al. “Calibration and Correction Procedure for Quantitative Out-of-plane Shearography.” MEASUREMENT SCIENCE & TECHNOLOGY 26.4 (2015): n. pag. Print.
APA
Zastavnik, F., Pyl, L., Gu, J., Sol, H., Kersemans, M., & Van Paepegem, W. (2015). Calibration and correction procedure for quantitative out-of-plane shearography. MEASUREMENT SCIENCE & TECHNOLOGY, 26(4).
Chicago author-date
Zastavnik, Filip, Lincy Pyl, Jun Gu, Hugo Sol, Mathias Kersemans, and Wim Van Paepegem. 2015. “Calibration and Correction Procedure for Quantitative Out-of-plane Shearography.” Measurement Science & Technology 26 (4).
Chicago author-date (all authors)
Zastavnik, Filip, Lincy Pyl, Jun Gu, Hugo Sol, Mathias Kersemans, and Wim Van Paepegem. 2015. “Calibration and Correction Procedure for Quantitative Out-of-plane Shearography.” Measurement Science & Technology 26 (4).
Vancouver
1.
Zastavnik F, Pyl L, Gu J, Sol H, Kersemans M, Van Paepegem W. Calibration and correction procedure for quantitative out-of-plane shearography. MEASUREMENT SCIENCE & TECHNOLOGY. 2015;26(4).
IEEE
[1]
F. Zastavnik, L. Pyl, J. Gu, H. Sol, M. Kersemans, and W. Van Paepegem, “Calibration and correction procedure for quantitative out-of-plane shearography,” MEASUREMENT SCIENCE & TECHNOLOGY, vol. 26, no. 4, 2015.
@article{5991378,
  abstract     = {Quantitative shearography applications continue to gain practical importance. However, a study of the errors inherent in shearography measurements, related to calibration of the instrument and correction of the results, is most often lacking. This paper proposes a calibration and correction procedure for the out-of-plane shearography with a Michelson interferometer. The calibration is based on the shearography measurement of known rigid-body rotations of a flat plate and accounts for the local variability of the shearing distance. The correction procedure further compensates for the variability of the sensitivity vector and separates the two out-of-plane deformation gradients when they are coupled in the measurement. The correction procedure utilizes two shearography measurements of the same experiment with distinct shearing distances. The effectiveness of the proposed calibration procedure is demonstrated in the case of a static deformation of a centrally loaded plate, where the discrepancy between experimental and finite element analysis results is minimized.},
  articleno    = {045201},
  author       = {Zastavnik, Filip and Pyl, Lincy and Gu, Jun and Sol, Hugo and Kersemans, Mathias and Van Paepegem, Wim},
  issn         = {0957-0233},
  journal      = {MEASUREMENT SCIENCE & TECHNOLOGY},
  keywords     = {PHASE-SHIFTING INTERFEROMETRY,SPECKLE SHEARING INTERFEROMETRY,SURFACE STRAIN-MEASUREMENT,DIGITAL SHEAROGRAPHY,COMPOSITE STRUCTURES,ALGORITHM,shearography,correction,calibration,shearing distance,sensitivity vector},
  language     = {eng},
  number       = {4},
  pages        = {21},
  title        = {Calibration and correction procedure for quantitative out-of-plane shearography},
  url          = {http://dx.doi.org/10.1088/0957-0233/26/4/045201},
  volume       = {26},
  year         = {2015},
}

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