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Testing and Analysis of the Shear Modulus of Urea Granules

Abstract : In order to study the interaction between urea and mechanical structure, using direct shear test method, the shear modulus of urea was tested by C-LM4 computer measurement and control shear force measuring instrument. The obtained test curves show that: extrusion makes the binding strength between urea molecules reduce, shear force peak emerge, then decline rapidly; as rolling granules and surrounding granules formed compression and friction resistance in contact surface along the direction of shear, shear force emerges rise again. At the test temperature 22℃, ambient humidity 45%, the density of urea granules 1.33 × 103kg/m3, the values range of shear modulus of urea granules was measured, which was 0.23- 0.3GPa.
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Jinfeng Wang, Detang Zou, Jinwu Wang, Wei Zhou. Testing and Analysis of the Shear Modulus of Urea Granules. 7th International Conference on Computer and Computing Technologies in Agriculture (CCTA), Sep 2013, Beijing, China. pp.137-144, ⟨10.1007/978-3-642-54344-9_17⟩. ⟨hal-01220906⟩

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