Interface frictional anisotropy of dilative sand
Abstract Understanding direction-dependent friction anisotropy is necessary to optimize interface shear resistance across soil-structure. Previous studies estimated interface frictional anisotropy quantitatively using contractive sands. However, no studies have explored how sand with a high dilative...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-56621-1 |
| _version_ | 1797259352418025472 |
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| author | Muhammad Naqeeb Nawaz Seung-Hun Lee Song-Hun Chong Taeseo Ku |
| author_facet | Muhammad Naqeeb Nawaz Seung-Hun Lee Song-Hun Chong Taeseo Ku |
| author_sort | Muhammad Naqeeb Nawaz |
| collection | DOAJ |
| description | Abstract Understanding direction-dependent friction anisotropy is necessary to optimize interface shear resistance across soil-structure. Previous studies estimated interface frictional anisotropy quantitatively using contractive sands. However, no studies have explored how sand with a high dilative tendency around the structural surface affects the interface shear response. In this study, a series of interface direct shear tests are conducted with selected French standard sand and snakeskin-inspired surfaces under three vertical stresses (50, 100, and 200 kPa) and two shearing directions (cranial → caudal or caudal → cranial). First, the sand-sand test observes a higher dilative response, and a significant difference between the peak and residual friction angles (ϕpeak − ϕres = 8°) is obtained at even a lower initial relative density Dr = 40%. In addition, the interface test results show that (1) shearing against the scales (cranial shearing) mobilizes a larger shear resistance and produces a dilative response than shearing along the scales (caudal shearing), (2) a higher scale height or shorter scale length exhibits a higher dilative tendency and produces a higher interface friction angle, and (3) the interface anisotropy response is more pronounced during cranial shearing in all cases. Further analysis reveals that the interface friction angle and dilation angle are decreased with the scale geometry ratio (L/H). For L/H values between 16.67 and 60, the interface dilation angle varies between 9° and 4° for cranial first shearing and 3.9°–2.6° for caudal first shearing. However, the difference in dilation angle within the same shearing direction is less than 1°. |
| first_indexed | 2024-04-24T23:08:04Z |
| format | Article |
| id | doaj.art-559fa31389e94ebbb93a104fdfe7c266 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-24T23:08:04Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-559fa31389e94ebbb93a104fdfe7c2662024-03-17T12:22:33ZengNature PortfolioScientific Reports2045-23222024-03-0114111310.1038/s41598-024-56621-1Interface frictional anisotropy of dilative sandMuhammad Naqeeb Nawaz0Seung-Hun Lee1Song-Hun Chong2Taeseo Ku3Department of Civil Engineering, Sunchon National UniversityDepartment of Civil Engineering, Sunchon National UniversityDepartment of Civil Engineering, Sunchon National UniversityDepartment of Civil and Environmental Engineering, Konkuk UniversityAbstract Understanding direction-dependent friction anisotropy is necessary to optimize interface shear resistance across soil-structure. Previous studies estimated interface frictional anisotropy quantitatively using contractive sands. However, no studies have explored how sand with a high dilative tendency around the structural surface affects the interface shear response. In this study, a series of interface direct shear tests are conducted with selected French standard sand and snakeskin-inspired surfaces under three vertical stresses (50, 100, and 200 kPa) and two shearing directions (cranial → caudal or caudal → cranial). First, the sand-sand test observes a higher dilative response, and a significant difference between the peak and residual friction angles (ϕpeak − ϕres = 8°) is obtained at even a lower initial relative density Dr = 40%. In addition, the interface test results show that (1) shearing against the scales (cranial shearing) mobilizes a larger shear resistance and produces a dilative response than shearing along the scales (caudal shearing), (2) a higher scale height or shorter scale length exhibits a higher dilative tendency and produces a higher interface friction angle, and (3) the interface anisotropy response is more pronounced during cranial shearing in all cases. Further analysis reveals that the interface friction angle and dilation angle are decreased with the scale geometry ratio (L/H). For L/H values between 16.67 and 60, the interface dilation angle varies between 9° and 4° for cranial first shearing and 3.9°–2.6° for caudal first shearing. However, the difference in dilation angle within the same shearing direction is less than 1°.https://doi.org/10.1038/s41598-024-56621-1Frictional anisotropyDilative sandDirect shear apparatusCranial shearingCaudal shearingInterface friction angle |
| spellingShingle | Muhammad Naqeeb Nawaz Seung-Hun Lee Song-Hun Chong Taeseo Ku Interface frictional anisotropy of dilative sand Scientific Reports Frictional anisotropy Dilative sand Direct shear apparatus Cranial shearing Caudal shearing Interface friction angle |
| title | Interface frictional anisotropy of dilative sand |
| title_full | Interface frictional anisotropy of dilative sand |
| title_fullStr | Interface frictional anisotropy of dilative sand |
| title_full_unstemmed | Interface frictional anisotropy of dilative sand |
| title_short | Interface frictional anisotropy of dilative sand |
| title_sort | interface frictional anisotropy of dilative sand |
| topic | Frictional anisotropy Dilative sand Direct shear apparatus Cranial shearing Caudal shearing Interface friction angle |
| url | https://doi.org/10.1038/s41598-024-56621-1 |
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