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Image-Segmentation Technique to Analyze Deformation Profiles in Different Direct Shear Tests

Vangla, Prashanth and Gali, Madhavi Latha (2014) Image-Segmentation Technique to Analyze Deformation Profiles in Different Direct Shear Tests. In: GEOTECHNICAL TESTING JOURNAL, 37 (5).

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Official URL: http://dx.doi.org 10.1520/GTJ20130138


Results from interface shear tests on sand-geosynthetic interfaces are examined in light of surface roughness of the interacting geosynthetic material. Three different types of interface shear tests carried out in the frame of direct shear-test setup are compared to understand the effect of parameters like box fixity and symmetry on the interface shear characteristics. Formation of shear bands close to the interface is visualized in the tests and the bands are analyzed using image-segmentation techniques in MATLAB. A woven geotextile with moderate roughness and a geomembrane with minimal roughness are used in the tests. The effect of surface roughness of the geosynthetic material on the formation of shear bands, movement of sand particles, and interface shear parameters are studied and compared through visual observations, image analyses, and image-segmentation techniques.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER SOC TESTING MATERIALS, 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 USA
Keywords: sand-geosynthetic interface; surface roughness; shear band; image analysis; direct shear test
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 19 Mar 2015 12:14
Last Modified: 19 Mar 2015 12:14
URI: http://eprints.iisc.ac.in/id/eprint/51071

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