分形维数
土工合成材料
直剪试验
土工膜
材料科学
表面光洁度
岩土工程
分形
剪切(地质)
抗剪强度(土壤)
表面粗糙度
复合材料
剪应力
地质学
数学
数学分析
土壤科学
土壤水分
作者
Abdulmuttalip Ari,Suat Akbulut
标识
DOI:10.1016/j.powtec.2022.117349
摘要
In this research, the effects of particle shape and surface structure on sand-geosynthetic interface shear strength were quantitatively investigated using fractal theory. Three different sand samples were prepared by considering the particle shape with overall regularity. Three geomembranes with different surface roughness and three EPS geofoams with various densities were selected to include the effect of surface roughness and hardness on the interface shear strength. Sand particles and geosynthetic surfaces were analyzed using image processing technique to measure the fractal dimension of the materials. Modified direct shear tests were performed to reveal the relationship between fractal dimension and interface shear strength. The shear tests pointed out that interface shear strength between sand and geosynthetic depends on both fractal dimension of materials (sand particles and geosynthetics) and surface hardness of geosynthetics. The proposed interface shear strength requires a complete approach rather than focusing on discrete effects.
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