Full-Field Displacement Characterisation of TCW Joint Using Digital Image Correlation and Comparison to Numerical Models

2017 ◽  
pp. 9-15
Author(s):  
Zhi Bin Tan ◽  
Liyong Tong
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Numerical Models ◽  
Image Correlation ◽  
Full Field ◽  
Field Displacement

Development of a Railway Track Displacement Monitoring by Using Digital Image Correlation Technique

2014 ◽  
Vol 548-549 ◽  
pp. 683-687 ◽  
Author(s):  
Lenny Iryani ◽  
Hery Setiawan ◽  
Tatacipta Dirgantara ◽  
Ichsan Setya Putra
Keyword(s):  
Digital Image Correlation ◽  
Stress Field ◽  
Digital Image ◽  
Displacement Field ◽  
Image Correlation ◽  
Railway Track ◽  
Remaining Life ◽  
Full Field ◽  
Field Displacement ◽  
Dic Technique

To avoid an unnecessary catastrophic accident due to a failure of a railway track, it is important to have a reliable condition monitoring system for the railway track. The integrity of the railway track can be assessed by monitoring the displacement field of the track, which can then be used to determine the strain and stress field. By knowing the stress history of the track and the S–N curves of the track material, the remaining life of the railway track can be predicted. In the present work, a simple system to monitor and record the displacement field of the railway track has been developed by using Digital Image Correlation (DIC) technique. The set–up to monitor the displacement field of the railway track was developed using a high speed video camera of Nikon J1 to capture the image of the railway track when the train passing through. The DIC technique was then employed off line to measure the displacement field of the 2D image captured. The results showed that the full field displacement measured by using DIC technique gives a good agreement compared to the finite element results. The full field displacement can be used to calculate the strain-stress field, and later on the remaining life assessment can be conducted based on the results.

scholarly journals Full-field deformation characteristics of anisotropic marble under compression revealed by 3D digital image correlation

2021 ◽  
Author(s):  
yu wang ◽  
zhengyang song ◽  
zhiqiang hou ◽  
chun zhu
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Progressive Failure ◽  
Three Dimensional ◽  
Image Correlation ◽  
Localized Deformation ◽  
Full Field ◽  
Strain Pattern ◽  
Field Displacement ◽  
3D Digital Image Correlation

This work aims to reveal the anisotropic full-field displacemnet and the progressive failure behaviors of interbedded marble under uniaxial compression using three dimensional digital image correlation (3D DIC) technique. The effects of the interbed orientation on the field displacement and strain pattern and the crack evolution were analyzed qualitatively and quantitatively. Testing results show that different stress strain responses can be generated depending on the interbed orientation, and the interbeds influence the localized deformation and high strain concentration pattern. The field displacement evolution curves present different pattern and are impacted by the localized deformation. In addition, the strain localization takes places progressively and develops at a lower rate for rock with 0° and 90° interbed than those of 30° and 60° interbed rock. The quick shear-sliding along the interbed leads to the minimum strength of rock having 30° interbed orientation. It is suggested that rock anisotropic field deformation is structure depended.

scholarly journals DIGITAL IMAGE CORRELATION FROM COMMERCIAL TO FOS SOFTWARE: A MATURE TECHNIQUE FOR FULL-FIELD DISPLACEMENT MEASUREMENTS

2018 ◽  
Vol XLII-2 ◽  
pp. 91-95 ◽  
Author(s):  
V. Belloni ◽  
R. Ravanelli ◽  
A. Nascetti ◽  
M. Di Rita ◽  
D. Mattei ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Open Source ◽  
Digital Image ◽  
Structural Engineering ◽  
Sample Surface ◽  
Image Correlation ◽  
Full Field ◽  
Field Displacement ◽  
University Of Rome ◽  
The University

In the last few decades, there has been a growing interest in studying non-contact methods for full-field displacement and strain measurement. Among such techniques, Digital Image Correlation (DIC) has received particular attention, thanks to its ability to provide these information by comparing digital images of a sample surface before and after deformation. The method is now commonly adopted in the field of civil, mechanical and aerospace engineering and different companies and some research groups implemented 2D and 3D DIC software. In this work a review on DIC software status is given at first. Moreover, a free and open source 2D DIC software is presented, named py2DIC and developed in Python at the Geodesy and Geomatics Division of DICEA of the University of Rome “La Sapienza”; its potentialities were evaluated by processing the images captured during tensile tests performed in the Structural Engineering Lab of the University of Rome “La Sapienza” and comparing them to those obtained using the commercial software Vic-2D developed by Correlated Solutions Inc, USA. The agreement of these results at one hundredth of millimetre level demonstrate the possibility to use this open source software as a valuable 2D DIC tool to measure full-field displacements on the investigated sample surface.

Cornea Full-field Displacement and Strain Measurement in Vivo Using Three-dimensional Digital Image Correlation

2018 ◽  
Vol 95 (11) ◽  
pp. 1027-1034 ◽  
Author(s):  
Xueyong Zhang ◽  
Qing Wang ◽  
Like Wang ◽  
Hong Xiao ◽  
Daming Zhang ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Strain Measurement ◽  
Three Dimensional ◽  
Image Correlation ◽  
Full Field ◽  
Field Displacement
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