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- W4318423114 abstract "Shear wave velocity is a key parameter to evaluate the engineering properties of granular materials, like sand. It is generally obtained using piezoelectric transducers in various laboratory tests. The micromechanical study on shear wave velocity has become increasingly important to understand the microscopic mechanism of variation of the mechanical properties, as well as to bridge its micro- and macro-scale mechanisms. In this paper, both shear vibration and torsional vibration for shear wave propagation in DEM are implemented by applying a velocity pulse to the transmitter in a certain direction and monitoring the corresponding average velocity of the receiver. The cross-correlation analysis is adopted due to its superiority of both determining the travel time and identifying similarities between two signals. The shear wave velocity is calculated using the wave travel time and the distance of the travel path, in exactly the same way as in laboratory tests. On the basis of systematic parametric studies, reasonable values for the main parameters are proposed, including excitation frequency, excitation amplitude, size of transmitter and receiver as well as damp. For example, it is found that the appropriate excitation amplitude should be chosen on the basis of avoiding the generation of frictional work. The numerical methods are verified through the outcomes of even-particle assemblies for both regular and random packing, and also compared with the results from various homogenization techniques." @default.
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- W4318423114 date "2012-08-06" @default.
- W4318423114 modified "2023-09-25" @default.
- W4318423114 title "Micromechanical Study on Shear Wave Velocity of Granular Materials Using Discrete Element Methods" @default.
- W4318423114 doi "https://doi.org/10.1039/bk9781849733601-00255" @default.
- W4318423114 hasPublicationYear "2012" @default.
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