Assessment of measuring errors in DIC using deformation fields generated by plastic FEA

Lava, Pascal; Cooreman, Steven; Coppieters, Sam; Strycker, Maarten De; Debruyne, Dimitri

doi:10.1016/j.optlaseng.2009.03.007

Cited by 184 publications

(161 citation statements)

References 26 publications

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“…The techniques of digital image correlation and reconstruction were evaluated separately, the first in many studies encountered in the bibliography [4,6,7,8,9,10], the second in the previous section. To test the DIC part and the reconstruction part simultaneously, we wanted to conduct a study similar to the work of the Workgroup "Metrology" of the French CNRS research network 2519 [4].…”

Section: Stereo-correlationmentioning

confidence: 99%

Error assessment in Image Stereo-correlation

Fazzini

Mistou

Dalverny

2010

EPJ Web of Conferences

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Abstract. The aim of this work is to estimate errors related to Stereo-correlation technique applied to measurements of displacements. In a first step, the influence of the cameras positions is tested using a standard object. In a second step, an evaluation of the stereo-correlation system is achieved. It is based on the generation of synthetic images representative of real speckle patterns deformed. With these images, various parameters are treated in order to determine their impact on the measurement error.

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Section: Stereo-correlationmentioning

confidence: 99%

Error assessment in Image Stereo-correlation

Fazzini

Mistou

Dalverny

2010

EPJ Web of Conferences

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“…The white light images were processed with DaVis 8.1.3 by LaVision using a cell size of 31 x 31 pixels and a step size of 6 pixels. To compute the subset displacement to greater accuracy, grey levels values are evaluated at subpixel locations using an interpolation method and the LSM method repeated in an iterative manner [29]. A 6 th order spline interpolation method was used for greater accuracy in displacement vectors at the cost of greater computation time.…”

Section: Data Processing and Presentationmentioning

confidence: 99%

Data-rich characterisation of damage propagation in composite materials

Battams

Dulieu-Barton

2016

Composites Part A: Applied Science and Manufacturing

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A novel methodology for the synchronised capture of high resolution white-light and infra-red (IR) images during a fatigue test is described. The approach allows digital image correlation (DIC) and thermoelastic stress analysis (TSA) to be applied practically simultaneously without the requirement to pause the cyclic load. The methodology is demonstrated on cross-ply carbon-epoxy specimens that have experienced damage induced by intermediate strain rate loading. Similar undamaged specimens are studied and the results from each compared.Various damage types are identified which include transverse cracking, delaminations and longitudinal splitting. The results are verified using X-ray computed tomography (CT).

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“…The analysis of the frames taken during the loading was done with specialized software. In this work, the in-house code MatchID (KU Leuven, Campus Ghent) (Lava et al 2009(Lava et al , 2010Wang et al 2011) was used. To reveal the displacements and deformations of an object during an experiment, typically a square subset of (2M þ 1) pixels (px) from the undeformed image is taken and its location in the deformed image is traced.…”

Section: Stereo-vision Digital Image Correlation (3d-dic)mentioning

confidence: 99%

The Use of Advanced Optical Measurement Methods for the Mechanical Analysis of Shear Deficient Prestressed Concrete Members

Wilder

Roeck

2016

Int J Concr Struct Mater

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This paper investigates on the use of advanced optical measurement methods, i.e. 3D coordinate measurement machines (3D CMM) and stereo-vision digital image correlation (3D DIC), for the mechanical analysis of shear deficient prestressed concrete members. Firstly, the experimental program is elaborated. Secondly, the working principle, experimental setup and corresponding accuracy and precision of the considered optical measurement techniques are reported. A novel way to apply synthesised strain sensor patterns for DIC is introduced. Thirdly, the experimental results are reported and an analysis is made of the structural behaviour based on the gathered experimental data. Both techniques yielded useful and complete data in comparison to traditional mechanical measurement techniques and allowed for the assessment of the mechanical behaviour of the reported test specimens. The identified structural behaviour presented in this paper can be used to optimize design procedure for shear-critical structural concrete members.

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Assessment of measuring errors in DIC using deformation fields generated by plastic FEA

Cited by 184 publications

References 26 publications

Error assessment in Image Stereo-correlation

Error assessment in Image Stereo-correlation

Data-rich characterisation of damage propagation in composite materials

The Use of Advanced Optical Measurement Methods for the Mechanical Analysis of Shear Deficient Prestressed Concrete Members

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