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- W2939372312 abstract "While it has been acknowledged from geophysical tests that the wave propagation is reliable in probing material properties, the understanding of wave behaviours in granular material remains limited due to its complexity. The current study presents a series of discrete-element modelling (DEM) on wave propagation in dry granular materials, in which both face-centred cubic (FCC) packing with increasing particle tolerance and random packing with monodisperse spheres have been considered. The elastic moduli and Poissons ratio of each packing have been obtained by compression (P-) and Shear (S-) wave velocities. While the stress exponent exceeds 1/3 that predicted by Hertz-Mindlin contact law with introducing the size dispersity, a linear relationship has still been identified between the coordination number normalized by contact force and the elastic moduli normalized by confining pressure. Besides, certain frequencies of received wave signal have been filtered in examining the frequency content, especially for those packings with high polydispersity at low stress level, thereby indicating that the specific frequency is attenuated due to the local disorder. The energy density ratio (K) is employed to estimate the degree of mode conversion, which shows shear waves will dominate when propagating in inhomogeneous granular assemblies." @default.
- W2939372312 created "2019-04-25" @default.
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- W2939372312 date "2018-01-01" @default.
- W2939372312 modified "2023-10-01" @default.
- W2939372312 title "Modelling Wave Propagation in Dry Granular Materials" @default.
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- W2939372312 doi "https://doi.org/10.1007/978-3-319-99474-1_37" @default.
- W2939372312 hasPublicationYear "2018" @default.
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