Study of the quality of wood texture patterns in digital image correlation

Abstract The quality of wood composites is dependent on the bondlines’ performance and their moisture resistance. The effect of moisture intrusion into bondlines is the focus of this study. The strain profile in the bondline during loading was investigated and the effects of weathering on the bondline were quantified by digital image correlation (DIC), while load deflection data were collected from lap-shear tests (LShTs). A total of 75 LShTs were evaluated including four different adhesive types with Douglas-fir wood, out of which 39 served as controls and 36 as substrates for weathering. The effect of weathering on failure load was not statistically significant. Only the bonded surface and adhesive type have significant effects on failure load, as well as the three-way interaction between the bonded surface, adhesive, and weathering, as revealed by three-way analysis of variance (ANOVA). The average effective shear moduli for the weathered samples were significantly lower than those for the control samples.

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The Influence of Sampling Frequency on the Results of Motion Analysis Performed by High-Speed Digital Image Correlation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.816.397 ◽

2015 ◽

Vol 816 ◽

pp. 397-403 ◽

Cited By ~ 1

Author(s):

Martin Hagara ◽

Róbert Huňady

Keyword(s):

Digital Image Correlation ◽

Correlation Analysis ◽

Experimental Determination ◽

Digital Image ◽

High Speed ◽

Sampling Frequency ◽

Image Correlation ◽

Correlation System

The paper describes an experimental determination of kinematic quantities using high-speed digital image correlation system. It deals with the analysis of minimal sampling frequency needed for correctly performed high-speed correlation analysis. The authors also describe the influence of cameras sampling frequency on the quality of the obtained results. Mentioned analysis was performed using a rotational object. For the purposes of the results comparison the data obtained from correlation system in a form of displacements in three mutually perpendicular directions were processed in Matlab and in the paper are depicted in a form of graphical visualizations.

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Digital Image Correlation for Cement-based Materials and Structural Concrete Testing

Civil Engineering Dimension ◽

10.9744/ced.22.1.6-12 ◽

2020 ◽

Vol 22 (1) ◽

pp. 6-12 ◽

Cited By ~ 4

Author(s):

Asdam Tambusay ◽

Benny Suryanto ◽

Priyo Suprobo

Keyword(s):

Digital Image Correlation ◽

Digital Image ◽

Low Cost ◽

Digital Camera ◽

Cement Composite ◽

Reinforced Concrete Beam ◽

Image Correlation ◽

Image Recording ◽

Composite Testing

This paper presents the application of a low-cost digital image correlation (DIC) system for automated crack mapping. The system employed makes use of a conventional digital camera, a remote image recording controller, and an open-source digital image correlation MATLAB software Ncorr. To showcase the potential of the proposed system, two case studies involving general structural and material testing were undertaken. In the first series, the DIC system was used to study the fracture processes in a reinforced concrete beam and to investigate the influence of key input parameters on the spatial quality of strain maps obtained from the DIC analysis. In the second series, the application of the DIC method was expanded to assist in the study of complex multiple micro-crack formations in ductile cement composite testing. It is shown that the strain maps obtained from the DIC technique have a close resemblance to the actual crack patterns

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Quality of Interfaces in Cu/Al Dissimilar Friction-Stirred Welds

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.959 ◽

2012 ◽

Vol 706-709 ◽

pp. 959-964 ◽

Cited By ~ 8

Author(s):

Marie Noëlle Avettand-Fènoël ◽

Roland Taillard ◽

Gang Ji

Keyword(s):

Digital Image Correlation ◽

Tensile Test ◽

Digital Image ◽

Pure Copper ◽

Image Correlation ◽

Al Alloy ◽

Welding Defects ◽

6082 Al Alloy ◽

Original Approach

The current work focuses on the particular case of dissimilar 6082 Al alloy/pure copper butt-friction stirred joints. It takes advantage of voluntarily non optimized welding conditions in order to test the potential of an original approach of identification of the welding defects by means of a single tensile test. The sequence and mechanism of the fracture events arise from their localization on the fracture surfaces thanks to strain maps obtained by digital image correlation. This technique of flaws identification is proved to be particularly efficient at least with the present highly damaged welds.

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