Journal ArticleDOI
Two-dimensional digital image correlation for in-plane displacement and strain measurement: a review
TLDR
In this article, a review of the 2D digital image correlation (2D DIC) technique for displacement field measurement and strain field estimation is presented, and detailed analyses of the measurement accuracy considering the influences of both experimental conditions and algorithm details are provided.Abstract:
As a practical and effective tool for quantitative in-plane deformation measurement of a planar object surface, two-dimensional digital image correlation (2D DIC) is now widely accepted and commonly used in the field of experimental mechanics. It directly provides full-field displacements to sub-pixel accuracy and full-field strains by comparing the digital images of a test object surface acquired before and after deformation. In this review, methodologies of the 2D DIC technique for displacement field measurement and strain field estimation are systematically reviewed and discussed. Detailed analyses of the measurement accuracy considering the influences of both experimental conditions and algorithm details are provided. Measures for achieving high accuracy deformation measurement using the 2D DIC technique are also recommended. Since microscale and nanoscale deformation measurement can easily be realized by combining the 2D DIC technique with high-spatial-resolution microscopes, the 2D DIC technique should find more applications in broad areas.read more
Citations
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Journal ArticleDOI
Improved crack monitoring in structural concrete by combined acoustic emission and digital image correlation techniques
TL;DR: In this paper, the authors proposed a crack monitoring technique for safety, cost-effective design and maintenance of concrete structures, which is crucial for safety and cost effective design of concrete structure.
Journal ArticleDOI
Single-camera microscopic stereo digital image correlation using a diffraction grating.
Bing Pan,Qiong Wang +1 more
TL;DR: The effectiveness and accuracy of the presented microscopic 3D-DIC method is verified by measuring the profile and 3D displacements of a regular cylinder surface.
Journal ArticleDOI
Error estimation in measuring strain fields with DIC on planar sheet metal specimens with a non-perpendicular camera alignment
TL;DR: In this article, the impact of a non-perpendicular camera alignment to a planar sheet metal specimen's surface is estimated in a numerical experiment and it is shown that a 3D-DIC stereo configuration induces a substantial compensation for the introduced imageplane displacement gradients.
Journal ArticleDOI
Micro deep learning profilometry for high-speed 3D surface imaging
TL;DR: Comparison results show that μDLP has superior performance in terms of the phase accuracy, reconstruction efficiency, and the ease of implementation over widely used Fourier-transform-based fast 3D imaging techniques, verifying that μ DLP is a powerful high-speed 3D surface imaging approach.
Journal ArticleDOI
The effect of flaw filling material on the compressive behaviour of 3D printed rock-like discs
TL;DR: In this article, the effect of filling material on the deformation and failure behavior of 3D printed rock-like Brazilian discs with pre-existing flaws is investigated by quasi-static compressive loading test combined with digital image correlation (DIC) technique.
References
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Surfaces generated by moving least squares methods
Peter Lancaster,K. Salkauskas +1 more
TL;DR: In this article, an analysis of moving least squares (m.l.s.) methods for smoothing and interpolating scattered data is presented, in particular theorems concerning the smoothness of interpolants and the description of m. l.s. processes as projection methods.
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Applications of digital-image-correlation techniques to experimental mechanics
Journal ArticleDOI
Digital Particle Image Velocimetry
Christian Willert,Morteza Gharib +1 more
TL;DR: In this article, the directional ambiguity associated with PIV and LSV is resolved by implementing local spatial cross-correlations between two sequential single-exposed particle images, and the recovered velocity data are used to compute the spatial and temporal vorticity distribution and the circulation of the vortex ring.
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Digital Imaging Techniques In Experimental Stress Analysis
W. H. Peters,W. F. Ranson +1 more
TL;DR: In this paper, the surface displacement components in laser speckle metrology were measured using a digital image scanner interfaced to a computer. Butt et al. used a boundary integral equation method to calculate surface traction in the contour.
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Digital image correlation using Newton-Raphson method of partial differential correction
TL;DR: In this paper, the authors developed and limited experimental verification of a method which can determine displacements and gradients using the Newton-Raphson method of partial corrections, which was shown to be accurate in determining displacement and certain gradients, while using significantly less CPU time than the current coarse-fine search method.