Local Deformation Analysis of a Sand Specimen Using 3D Digital Image Correlation for the Calibration of a Simple Elasto-Plastic Model

Extended digital image correlation method for analysis of discrete discontinuity

“…The parameters J T ¼ 0; 0 f g, j u ¼ j v ¼ 0 in the regular side. Displacement jump given in (18) may be added at a point ðy; xÞ in enriched side if the following equation is satisfied…”

“…(17) and (18). Uni-axial tension, ε xx of 3:07 Â 10 À 4 was applied throughout the deformed image with a constant displacement jump along the y-direction, j v of 0.2 pixel at the right side of the joint, i.e.…”

“…Rechenmacher et al [17] have employed the DIC technique to identify and characterize the development of vortex structures inside shear bands formed in dense sands during plane strain compression. Three-dimensional digital image correlation (3D DIC) analysis has been performed by Son et al [18] to investigate the displacements on the surface of a dense sand specimen during a triaxial compression test. To achieve their objective, they have developed a 2D finite element model for comparing the experimental results under displacement controlled loading conditions and found to be in good agreement.…”

Large-scale soil–structure physical model (1g) – assessment of structure damages

“…DIC allows monitoring the whole surface of the ground and more especially where ground movements occur. The commercial software VIC3D from Limess GmbH was chosen, after analysing different commercial software, owing to its effectiveness in computing sand grain movements showing very low contrast (Son et al, 2012). VIC3D provides full-field, 3D measurements of shape, displacement and strain.…”

X-ray microtomography analysis of soil structure deformation caused by centrifugation

“…Automated methods to detect deformation are usually based on digital volume correlation (Bay et al, 1999;Lenoir et al, 2007;Peth et al, 2010;Hall, 2010;Son et al, 2012). The rationale of this method is to recover the displacement field by finding a geometric transformation of a deformed image that optimizes a correlation coefficient with the original, undeformed target image.…”