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A platform for research: civil engineering, architecture and urbanism
Perturbations in Granular Materials: Subtleties in DEM Modeling
The current study reveals subtleties in the proper modeling of strain perturbations during the instability analysis of granular materials and their incremental behavior using the Discrete Element Method (DEM). Multi-directional strain probings are conducted at different states along an initial stress-strain curve. The influence of the particles’ inertia at the beginning of each strain probe is highlighted and remedies to minimize inertia effects toward reaching a static equilibrium are discussed. An instability analysis of the strain probes as a function of fluctuations in the stress-strain curve demonstrates a difference in material response in the presence of kinetic micro-avalanches. Finally, the nature of the incremental behavior in stress responses is explored with respect to size of the strain probes and energy characteristics.
Perturbations in Granular Materials: Subtleties in DEM Modeling
The current study reveals subtleties in the proper modeling of strain perturbations during the instability analysis of granular materials and their incremental behavior using the Discrete Element Method (DEM). Multi-directional strain probings are conducted at different states along an initial stress-strain curve. The influence of the particles’ inertia at the beginning of each strain probe is highlighted and remedies to minimize inertia effects toward reaching a static equilibrium are discussed. An instability analysis of the strain probes as a function of fluctuations in the stress-strain curve demonstrates a difference in material response in the presence of kinetic micro-avalanches. Finally, the nature of the incremental behavior in stress responses is explored with respect to size of the strain probes and energy characteristics.
Perturbations in Granular Materials: Subtleties in DEM Modeling
Springer Ser.Geomech.,Geoengineer.
Pasternak, Elena (editor) / Dyskin, Arcady (editor) / Farahnak, Mojtaba (author) / Wan, Richard (author) / Pouragha, Mehdi (author) / Nicot, François (author)
International Workshop on Bifurcation and Degradation in Geomaterials ; 2022 ; perth, WA, Australia
Multiscale Processes of Instability, Deformation and Fracturing in Geomaterials ; Chapter: 22 ; 212-219
2022-12-13
8 pages
Article/Chapter (Book)
Electronic Resource
English
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