Cyclic torsional shear loading test for an unsaturated, hollowed specimen using Bangkok clayey soil |
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Authors: | P Usaborisut M Koike B Bahalayodhin T Niyamapa A Yoda |
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Institution: | a Faculty of Engineering, Kasetsart University, Kamphaengsaen Campus, Nakhon Pathom 73140, Thailand;b Institute of Agricultural and Forest Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan |
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Abstract: | Cyclic torsional shear loading was applied to simulate the loading characteristics which take place particularly during quick turning operations of a tractor in the field. Indoor experimental tests using a cyclic torsional shear loading method were conducted to clarify the dynamic behavior of Bangkok clayey soil. Since most agricultural soils in the field are normally unsaturated, this test method was used to better match field conditions. The dynamic behavior of our test soil was observed in conjunction with various factors including stress, strain, loading frequency, bulk density, moisture content, and number of loading cycles. Some related results were also obtained under static loading using a triaxial test method. |
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