Determination of Viscoelastic Poisson’s Ratio of Solid Propellants using an Accuracy-enhanced 2D Digital Image Correlation Technique

2015 ◽  
Vol 40 (6) ◽  
pp. 821-830 ◽  
Author(s):  
Bing Pan ◽  
Liping Yu ◽  
Jieyu Yuan ◽  
Zhibin Shen ◽  
Guojin Tang
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Poisson’S Ratio ◽  
Image Correlation ◽  
Poisson's Ratio ◽  
Correlation Technique ◽  
Solid Propellants ◽  
Digital Image Correlation Technique ◽  
2D Digital Image Correlation

scholarly journals DETERMINATION OF THE POISSON’S RATIO IN CONCRETE BY USING DITIGITAL IMAGE CORRELATION

2021 ◽  
pp. 26-32
Author(s):  
Yaroslav Blikharskyy
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Poisson’S Ratio ◽  
Concrete Strength ◽  
Correlation Method ◽  
Image Correlation ◽  
Poisson's Ratio ◽  
Digital Correlation ◽  
Transverse Stresses

The article presents the results of the experimental investigation of concrete prismsand determination of the Poisson's ratio using the method of digital image correlation (DIC). Toachieve the goals and objectives of the research, a concrete prism measuring 100x100x400 mm ofclass C50 / 60 was formed. The surface of the prism was cleaned and levelled to a smooth surfacewith a mechanical device and grinding stone. The surface of the prism is then cleaned with a solventto remove dust residues. After that, speckles were applied to determine the strain using the DICmethod. For determine the strain, by using digital image correlation, were used Two FlirGrasshopper 3 cameras with a Computar F25 / 2.8 lens and a Sigma 70-200 mm f2.8 APO EX DGHSM Macro II lens. Stains for image correlation were recorded at a speed of 250 ms. 2 LED lampswere used for lighting. Since the press is not able to record the load in time, to record the load useda camera at a speed of 50 frames/sec. The load was applied evenly at the same rate to the physicaldestruction of the test samples. As a result, the images were processed using VIC-2D software toobtain vertical and transverse strains. The advantage of the image correlation method is the abilityto obtain deformations and, accordingly, the stress of the full surface of the sample. Thus, if weanalyse the horizontal (transverse) stresses for a prism with a concrete strength of C50 / 60, it ispossible to see the appearance of internal cracks in the sample before it occurs outside, at a timewhen cracks cannot be visually fixed. As a result of work the technique of testing of concrete sampleswith use of digital correlation of the image is developed and presented. The Poisson's ratio from thebeginning of loading to the destruction of the sample was determined experimentally by the developedmethod.

Determination of creep compliance, recovery and Poisson's ratio of elastomers by means of digital image correlation (DIC)

2017 ◽  
Vol 59 ◽  
pp. 245-252 ◽  
Author(s):  
Leonardo Israel Farfán-Cabrera ◽  
Juan Benito Pascual-Francisco ◽  
Omar Barragán-Pérez ◽  
Ezequiel Alberto Gallardo-Hernández ◽  
Orlando Susarrey-Huerta
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Poisson’S Ratio ◽  
Creep Compliance ◽  
Image Correlation ◽  
Poisson's Ratio

Determination of the Local Strains Near Stress Concentrators by the Digital Image Correlation Technique

2015 ◽  
Vol 50 (4) ◽  
pp. 488-495 ◽  
Author(s):  
Ya. L. Ivanyts’kyi ◽  
Yu. V. Mol’kov ◽  
P. S. Kun’ ◽  
T. M. Lenkovs’kyi ◽  
M. Wójtowicz
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Image Correlation ◽  
Correlation Technique ◽  
Digital Image Correlation Technique ◽  
Local Strains ◽  
Stress Concentrators
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