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
Self-Adaptive Digital Volume Correlation for Unknown Deformation Fields
TL;DR: By minimizing the V-shaped models of theoretically predicted total errors, optimal subvolume size and the best shape function can be identified as inputs for self-adaptive DVC analysis at each calculation point.
Journal ArticleDOI
The energy absorption of thin-walled tubes designed by origami approach applied to the ends
TL;DR: In this paper, a novel origami-ending tube (OET) was proposed by introducing some small triangular origami patterns into the ends of the tube module, which greatly simplified the manufacturing process because it did not require welding.
Journal ArticleDOI
Quantitative characterization of deformation and damage process by digital volume correlation: A review
TL;DR: In this paper, a review summarizes the recent progresses in the study of the internal movement of granular materials, inhomogeneous deformation of composite materials, and stress intensity factor around a crack front in static and fatigue states using DVC.
Journal ArticleDOI
Determination of cohesive laws in wood bonded joints under mode II loading using the ENF test
Filipe Silva,José Morais,Nuno Dourado,José Xavier,F.A.M. Pereira,F.A.M. Pereira,M.F.S.F. de Moura +6 more
TL;DR: In this article, the authors determined the cohesive laws of wood bonded joints under mode II loading using two different methods: the direct method requires the establishment of the relation between the strain energy release rate under GII and the corresponding crack tip shear displacement (CTSDII).
Journal ArticleDOI
Digital image correlation as a strain measurement technique for fibre tensile tests
TL;DR: In this article, a method is presented to test fibres in tension using direct strain measurement, which eliminates the need to test the fibres at multiple gauge lengths to correct for machine compliance, reducing the number of samples.
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.