Application of iteration and finite element smoothing technique for displacement and strain measurement of digital speckle correlation

Meng, L.B.; Jin, Guo Fan; Yao, Xuefeng

doi:10.1016/j.optlaseng.2006.04.012

Cited by 82 publications

(38 citation statements)

References 11 publications

(14 reference statements)

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“…The pressure difference between the upwind side and the downwind generated torque around the Z axis. This torque could adjust the expansion range of otter board cooperated with different hole position of wrap board (Meng L B et al, 2007). …”

Section: Resultsmentioning

confidence: 99%

The Numerical Simulation of High Aspect Ratio Vertical SLAT Type Otter Board

Yuan¹,

Ma²,

Qi³

et al. 2016

Proceedings of the 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering

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Fluid simulation software FLUENT was used to study the flow distribution of vertical SLAT type otter board, when the SLAT angle (θ) ranging from 28 to 40 degree, and analyzed the relationship between SLAT angle and lift coefficient, drag coefficient, lift-to-drag ratio. Simulated the flow distribution in different attack angles (α) when the velocity at 1.54 m/s, analyzed the relationship between attack angles and lift coefficient, drag coefficient, lift-to-drag ratio. Also simulated the dynamics parameters when the velocity changing from 0.51 to 2.57 m/s, analyzed the relationship between Reynolds and lift coefficient, drag coefficient, lift-to-drag ratio. Aimed at provided theoretical help for the design and improvement of the otter board. KEYWORD: vertical SLAT type otter board; numerical simulation; hydrodynamic performance 4th International Conference on Mechanical Materials and Manufacturing Engineering (MMME 2016)

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Section: Resultsmentioning

confidence: 99%

The Numerical Simulation of High Aspect Ratio Vertical SLAT Type Otter Board

Yuan¹,

Ma²,

Qi³

et al. 2016

Proceedings of the 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering

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“…By using the proposed method, an arbitrary decision on the subset size was eliminated and the continuity of displacement was guaranteed. In 2007, Meng et al [41] introduced an iteration and finite element smoothing technique to improve the accuracy of the displacement field results. Basically, the algorithm was implemented to smooth the full-field displacement results that were determined by the Newton-Raphson iteration scheme.…”

Section: Improvement Of 2d-dic Algorithms Regarding Their Measurementmentioning

confidence: 99%

A Review of Surface Deformation and Strain Measurement Using Two-Dimensional Digital Image Correlation

Khoo¹,

Karuppanan²,

Tan³

2016

Metrology and Measurement Systems

101

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Among the full-field optical measurement methods, the Digital Image Correlation (DIC) is one of the techniques which has been given particular attention. Technically, the DIC technique refers to a non-contact strain measurement method that mathematically compares the grey intensity changes of the images captured at two different states: before and after deformation. The measurement can be performed by numerically calculating the displacement of speckles which are deposited on the top of object's surface. In this paper, the Two-Dimensional Digital Image Correlation (2D-DIC) is presented and its fundamental concepts are discussed. Next, the development of the 2D-DIC algorithms in the past 33 years is reviewed systematically. The improvement of 2D-DIC algorithms is presented with respect to two distinct aspects: their computation efficiency and measurement accuracy. Furthermore, analysis of the 2D-DIC accuracy is included, followed by a review of the DIC applications for two-dimensional measurements.

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“…In global smoothing methods, all noisy displacements are considered as a whole and fitted by piecewise interconnecting basis functions. Finite element-based (FE-based) smoothing methods, which are global smoothing methods, are effective noncontact methods of strain field measurement in experimental mechanics [22,23]. This approach employs a finite element framework to establish a global description of the displacement field and determines the displacements at nodes.…”

Section: Introductionmentioning

confidence: 99%

Strain Analysis of the Nuozhadu High Rockfill Dam during Initial Impoundment

Chi

2018

Mathematical Problems in Engineering

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The safety of rockfill dams during initial impoundment has always been an issue of interest for regulatory agencies. Specifically, it is necessary to identify potential tensile strain zones and shear strain concentration zones in which cracks may form. In this paper, a meshless smoothing method is proposed to construct the strain field of a prototype dam based on monitoring displacement data. For verification, this method is applied to calculate the strain field of the Nuozhadu core wall rockfill dam. The results show that the proposed method can provide regulatory agencies with an effective tool for dam inspection during initial impoundment.

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Application of iteration and finite element smoothing technique for displacement and strain measurement of digital speckle correlation

Cited by 82 publications

References 11 publications

The Numerical Simulation of High Aspect Ratio Vertical SLAT Type Otter Board

The Numerical Simulation of High Aspect Ratio Vertical SLAT Type Otter Board

A Review of Surface Deformation and Strain Measurement Using Two-Dimensional Digital Image Correlation

Strain Analysis of the Nuozhadu High Rockfill Dam during Initial Impoundment

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