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Article

A Strain-Gauge-Based Method for the Compensation of Out-of-Plane Motions in 2D Digital Image Correlation

Department of Mechanical and Mechatronic Engineering, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
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Author to whom correspondence should be addressed.
Math. Comput. Appl. 2023, 28(2), 40; https://doi.org/10.3390/mca28020040
Submission received: 15 February 2023 / Revised: 6 March 2023 / Accepted: 8 March 2023 / Published: 10 March 2023
(This article belongs to the Special Issue Current Problems and Advances in Computational and Applied Mechanics)

Abstract

When performing a digital image correlation (DIC) measurement, multi-camera stereo-DIC is generally preferred over single-camera 2D-DIC. Unlike 2D-DIC, stereo-DIC is able to minimise the in-plane strain error that results from out-of-plane motion. This makes 2D-DIC a less viable alternative for strain measurements than stereo-DIC, despite being less financially and computationally expensive. This work, therefore, proposes a strain-gauge-based method for the compensation of errors from out-of-plane motion in 2D-DIC strain measurements on planar specimens. The method was first developed using equations for the theoretical strain error from out-of-plane motions in 2D-DIC and was then applied experimentally in tensile tests to two different dog-bone specimen geometries. The compensation method resulted in a clear reduction in the strain error in 2D-DIC. The strain-gauge-based method thus improves the accuracy of a 2D-DIC measurement, making it a more viable option for performing full-field strain measurements and providing a possible alternative in cases where stereo-DIC is not practical or is unavailable.
Keywords: digital image correlation; error compensation; out-of-plane motion; strain gauges; full-field strain data digital image correlation; error compensation; out-of-plane motion; strain gauges; full-field strain data

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MDPI and ACS Style

Visser, C.-H.; Venter, G.; Neaves, M. A Strain-Gauge-Based Method for the Compensation of Out-of-Plane Motions in 2D Digital Image Correlation. Math. Comput. Appl. 2023, 28, 40. https://doi.org/10.3390/mca28020040

AMA Style

Visser C-H, Venter G, Neaves M. A Strain-Gauge-Based Method for the Compensation of Out-of-Plane Motions in 2D Digital Image Correlation. Mathematical and Computational Applications. 2023; 28(2):40. https://doi.org/10.3390/mca28020040

Chicago/Turabian Style

Visser, Carl-Hein, Gerhard Venter, and Melody Neaves. 2023. "A Strain-Gauge-Based Method for the Compensation of Out-of-Plane Motions in 2D Digital Image Correlation" Mathematical and Computational Applications 28, no. 2: 40. https://doi.org/10.3390/mca28020040

APA Style

Visser, C.-H., Venter, G., & Neaves, M. (2023). A Strain-Gauge-Based Method for the Compensation of Out-of-Plane Motions in 2D Digital Image Correlation. Mathematical and Computational Applications, 28(2), 40. https://doi.org/10.3390/mca28020040

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