Framework to optimise two-dimensional DIC measurements at different orders of accuracy for concrete structures

Liu, Qifang; Looi, D. T. W.; Chen, Helen Hongniao; Tang, Chen; Su, R.K.L.

doi:10.1016/j.istruc.2020.08.056

Cited by 18 publications

(6 citation statements)

References 36 publications

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“…Digital image correlation technology (DIC) has good accuracy and the ability to monitor real-time full-field displacement, so it is widely used to study surface strain field or crack behavior [28,29]. DIC was used to obtain the strain cloud image on the surface of the thin-film battery.…”

Section: Experimental Materials and Test Methodsmentioning

confidence: 99%

On the Mechanical and Electrical Properties of the Composite Structure of PVC Membrane and Thin-Film Battery under Biaxial Tension

et al. 2021

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This paper aims to study the mechanical and electrical properties of the composite structure of PVC film and film cell under biaxial tension. The saddle PVC membrane structure with thin-film battery was obtained by biaxial tensile tests carried out on the composite structure along the fiber direction and at an angle of 45 degrees to the fiber, respectively. The deformation of the film cell and PVC membrane materials was tested using digital image technology, and the voltage of the film cell was tested using a multimeter. The results showed that the tensile strain occurred in both membrane batteries and PVC membrane at different loading levels, and the former was always less than the latter. At a tensile load with the ultimate load ratio of 60%, it was only at the film cell’s outer edge that the stripping occurred. Under the illumination of a stable light source, the film cell voltage decreased gradually with the increasing tensile load. No more than 10% of the cell voltage drop occurred when the membrane material, the principal tensile strain of the cell, and the cell’s expansion area ratio were less than 3.1%, 2.8%, and 1.03, respectively. The experimental results show that the film cell can be applied to the saddle membrane structure by controlling the appropriate load.

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Section: Experimental Materials and Test Methodsmentioning

confidence: 99%

On the Mechanical and Electrical Properties of the Composite Structure of PVC Membrane and Thin-Film Battery under Biaxial Tension

et al. 2021

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“…DIC employs a speckle texture on the surface of the measured object as the deformation information carrier [ 15 ]. Two-dimensional DIC (2D-DIC) [ 16 ] adopts a single camera to capture images, making it is easy to operate, but it can only measure in-plane deformation. Three-dimensional DIC (3D-DIC) [ 17 ] can measure the 3D deformation of objects with high accuracy, but it requires synchronous triggering of multiple cameras.…”

Section: Introductionmentioning

confidence: 99%

High-Accuracy Three-Dimensional Deformation Measurement System Based on Fringe Projection and Speckle Correlation

Zhang

Liu

2023

Sensors

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Fringe projection profilometry (FPP) and digital image correlation (DIC) are widely applied in three-dimensional (3D) measurements. The combination of DIC and FPP can effectively overcome their respective shortcomings. However, the speckle on the surface of an object seriously affects the quality and modulation of fringe images captured by cameras, which will lead to non-negligible errors in the measurement results. In this paper, we propose a fringe image extraction method based on deep learning technology, which transforms speckle-embedded fringe images into speckle-free fringe images. The principle of the proposed method, 3D coordinate calculation, and deformation measurements are introduced. Compared with the traditional 3D-DIC method, the experimental results show that this method is effective and precise.

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“…The advantage of this procedure means the possibility of monitoring the crack development caused by the expansion of the reinforcing element due to corrosion [31]. Due to the lack of a standard procedure for the optimisation of the 2D-DIC parameters, Lie et al [32] established parameters for concrete structures at three accuracy levels, which can be used as a source of reference in concrete testing.…”

Section: Introductionmentioning

confidence: 99%

Pavement Structure Characteristics and Behaviour Analysis with Digital Image Correlation

2023

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Digital image correlation (DIC) is a method of point displacement measurement by an optical system. If two cameras are used for capturing the same point displacement, three-dimensional data are obtained using the 3D-DIC method. The areas of application of this method in pavement construction are diverse, but it is mainly used for displacement monitoring during standard tests of the failure of specimens due to load application. Furthermore, DIC technology was used only for testing particular material characteristics and assuming their influence on the overall pavement system. Within this research, DIC was applied in two areas: defining material mechanical characteristics and analyses of pavement structure behaviour under cyclic loading. The scope of this research was to gain more insights into DIC’s potential application within pavement behaviour analyses, specifically on cement-bound granular material (CBGM) characterisation. Results from this study confirm the suitability of 3D-DIC technology for pavement material characterisation. Furthermore, it is shown that certain trends of material behaviour defined on the simple material level of each independent pavement layer will significantly differ when it is placed in the system, and this kind of complex analysis is possible by using 3D-DIC technology.

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Framework to optimise two-dimensional DIC measurements at different orders of accuracy for concrete structures

Cited by 18 publications

References 36 publications

On the Mechanical and Electrical Properties of the Composite Structure of PVC Membrane and Thin-Film Battery under Biaxial Tension

On the Mechanical and Electrical Properties of the Composite Structure of PVC Membrane and Thin-Film Battery under Biaxial Tension

High-Accuracy Three-Dimensional Deformation Measurement System Based on Fringe Projection and Speckle Correlation

Pavement Structure Characteristics and Behaviour Analysis with Digital Image Correlation

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