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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Non-destructive investigation of cellular level moisture distribution and morphological changes during drying of a plant-based food material
TL;DR: In this paper, the authors investigated the complex microstructural changes and cell-level water transportation in plant-based food materials during drying, using X-ray micro-computed tomography (X-ray μCT).
Journal ArticleDOI
Regional and fiber orientation dependent shear properties and anisotropy of bovine meniscus.
TL;DR: If shear stress response homogeneity and directionality exists in and between bovine menisci with respect to anatomical location, region, region (anterior, central, and posterior) and fiber orientation (parallel and perpendicular) is determined.
Journal ArticleDOI
Evaluation and improvement of digital image correlation uncertainty in dynamic conditions
TL;DR: This work aims to evaluate and improve DIC uncertainty in dynamic conditions in the case of translating target, and proposes a numerical technique to improve the performances of DIC in dynamic applications.
Journal ArticleDOI
Curvature Monitoring of Beams Using Digital Image Correlation
TL;DR: In this paper, a method for measuring longitudinal strains with the height at a section, and thus the curvature, using a technique based on digital image correlation (DIC), is presented.
Journal ArticleDOI
Homography-based measurement of bridge vibration using UAV and DIC method
TL;DR: A homography-based method by combining an unmanned aerial vehicle (UAV) and the digital image correlation (DIC) together for vibration measurement of a bridge model and the effectiveness of the proposed method is validated against the fixed camera- based method.
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
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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.