Micro-mechanical response of transversely isotropic samples under cyclic loading
Micro-mechanical response of transversely isotropic samples under cyclic loading
This study aims to identify the effect of inherent anisotropy (bedding plane inclination) and mechanisms affecting the susceptibility of granular soils to liquefaction by utilizing the three-dimensional discrete element method (DEM). A set of simulations were carried out on transversely isotropic particulate assemblies as well as isotropic sample under undrained cyclic constant total mean pressure conditions varying the inherent anisotropy and deviatoric stress loading amplitude. Simulations highlight the combined impact of shear stress amplitude and anisotropic microstructure of the assemblies on the liquefaction potential, post-liquefaction displacement, coordination number, and accumulation of excess pore-water pressure. In addition, the results show that the preferential particle elongation and contact anisotropy of particles at liquefaction are highly dependent on the predefined anisotropy direction. It turns out, that the inherent anisotropy affects the undrained cyclic resistance.
Mohammadjavad Salimi; Merita Tafili; Nazanin Irani; T. Wichtmann
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
2. Finite element, finite difference, discrete element, material point and other methods
https://doi.org/10.53243/NUMGE2023-179
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