Khan, R and Latha, GM (2023) Integrated Digital Image Analyses for Understanding the Particle Shape Effects on Sand�Geomembrane Interface Shear. In: International Journal of Geosynthetics and Ground Engineering, 9 (6).
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Abstract
This paper investigates the influence of particle shape on the multi-scale shear behavior of sand�geomembrane interfaces through advanced imaging techniques. Two sand specimens with similar particle size distribution but varying particle shapes were scanned using X-ray micro-computed tomography (µCT). The data were processed and analyzed using MATLAB to extract relevant shape parameters like sphericity, roundness, and fractal dimension. Interface shear tests were conducted using a modified direct shear apparatus, which allows image analysis of sand�geomembrane interactions by capturing the kinematics of particles at the contact plane. Additionally, micro-topographical analysis was carried out using a digital profilometer to measure the surface changes of the geomembranes after shearing. By combining the findings from the µCT of sands and micro-topographical analyses of sheared geomembranes, this study aims to gain insights into the macroscopic shear behavior and relate it to the underlying micro-mechanisms. The findings indicated that the increased shear strength observed in irregular particles has a direct correlation with the deeper indentations caused by these particles and the larger localized shear zones associated with these particles. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
| Item Type: | Journal Article |
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| Publication: | International Journal of Geosynthetics and Ground Engineering |
| Publisher: | Springer Science and Business Media Deutschland GmbH |
| Additional Information: | The copyright for this article belongs to author |
| Keywords: | Computerized tomography; Fractal dimension; Image correlation; Particle size analysis; Profilometry; Sand; Shear flow, Digital image analysis; Digital image correlations; Interface shear; Micro-computed tomography; Non-dilative interface; Particle shape; Profilometers; Sand-geomembrane interface; Shear behaviour; Topographical analysis, Particle size |
| Department/Centre: | Division of Mechanical Sciences > Civil Engineering |
| Date Deposited: | 28 Feb 2024 11:55 |
| Last Modified: | 28 Feb 2024 11:55 |
| URI: | https://eprints.iisc.ac.in/id/eprint/83643 |
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