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

机译:图像分割技术分析不同直接剪切试验中的变形轮廓

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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.
机译:根据相互作用的土工合成材料的表面粗糙度,检查了在砂土工合成材料界面上进行的界面剪切测试的结果。比较了在直接剪切测试设置框架中执行的三种不同类型的界面剪切测试,以了解诸如箱体固定性和对称性等参数对界面剪切特性的影响。在测试中可以看到靠近界面的剪切带的形成,并在matlab中使用图像分段技术对剪切带进行了分析。在测试中使用了具有中等粗糙度的编织土工布和具有最小粗糙度的土工膜。通过视觉观察,图像分析和图像分割技术,研究并比较了土工合成材料的表面粗糙度对剪切带形成,砂粒运动和界面剪切参数的影响。

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