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
Speckle-based x-ray phase-contrast imaging with a laboratory source and the scanning technique
Tunhe Zhou,Irene Zanette,Marie-Christine Zdora,Ulf Lundström,Daniel H. Larsson,Hans M. Hertz,Franz Pfeiffer,Anna Burvall +7 more
TL;DR: The speckle-based scanning method for x-ray phase-contrast imaging is implemented with a liquid-metal-jet source, using the two-dimensional scanning technique, and the phase shift introduced by the object is retrieved in both transverse orientations.
Journal ArticleDOI
Bond behaviour of Steel Reinforced Polymer strengthening systems
TL;DR: In this article, the mechanical properties of both textiles and steel reinforced polymers (SRP) composites were derived through direct tensile tests, which provided information on bond strength, failure mode, load-slip response and effective transfer length.
Strain mapping at the micro-scale in hierarchical polymer composites with aligned carbon nanotube grafted fibers
Mahoor Mehdikhani,Anna Matveeva,Stepan Vladimirovitch Lomov,Larissa Gorbatikh,Mohammadali Aravand,Brian L. Wardle +5 more
TL;DR: In this paper, a micro-scale digital image correlation (μDIC) was used to detect debonded regions at the fiber/matrix interface with openings as small as 35nm.
Journal ArticleDOI
High-strain-rate brain injury model using submerged acute rat brain tissue slices.
Malisa Sarntinoranont,Sung Jin Lee,Yu Hong,Michael A. King,Ghatu Subhash,Jiwoon Kwon,David F. Moore +6 more
TL;DR: A new ex vivo model in which living tissue slices from rat brain were subjected to high-strain-rate loads using a polymer split Hopkinson pressure bar with real-time high-speed imaging, which provides a controllable test environment to study injury to submerged brain slices over a range of strain rate, pressure, and strain loads.
Journal ArticleDOI
Digital image correlation (DIC) for measuring strain in brick masonry specimen using Ncorr open source 2D MATLAB program
TL;DR: In this paper, a simple DSLR camera along with Ncorr, an open source 2D MATLAB program is used to perform the DIC on a 2D structural element like brick masonry specimen.
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.
Journal ArticleDOI
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.