Microscopic analyses of stress profile within confined granular assemblies
Zhao H., An X., Wu Y., Yan S.
AIP Advances
Vol.8, Issue7, Num.075124
Опубликовано: 2018
Тип ресурса: Статья
Аннотация:
Bottom pressure of confined granular assemblies saturates at a certain value even this packing bed is being continuously charged. Corresponding formulation has been established to describe this interesting phenomenon. In this work, the influences of particle size and friction on the bottom stresses of granular matter were numerically investigated by discrete element method (DEM). It is found that the Janssen model can well predict the stress profile only when the size ratio of the container versus the particle is larger than 16. Moreover, a hydrostatic linear relation between apparent mass and filling mass can be obtained when the friction coefficient becomes insignificant (μ ≤ 0.01). To further interpret the Janssen effects, the granular assemblies are characterized and evaluated from the overall interactions with sidewalls, angular distribution function, void size distribution, coordination number, contact networks, contact orientation and distributions of contact forces within the p
Ключевые слова:
Angular distribution; Distribution functions; Finite difference method; Friction; Granular materials; Particle size; Stress analysis; Bottom pressures; Coordination number; Friction coefficients; Granular assembly; Industrial processs; Microscopic analysis; Packing structure; Void size distribution; Particles (particulate matter)
Язык текста: Английский
ISSN: 2158-3226
Zhao H.
An X.
Wu Y.
Yan S. Syaokhun 1984-
Жао Х.
Ан Х.
Wу Y.
Ян С. Сяохун 1984-
Microscopic analyses of stress profile within confined granular assemblies
Текст визуальный непосредственный
AIP Advances
Vol.8, Issue7 Num.075124
2018
Статья
Angular distribution Distribution functions Finite difference method Friction Granular materials Particle size Stress analysis Bottom pressures Coordination number Friction coefficients Granular assembly Industrial processs Microscopic analysis Packing structure Void size distribution Particles (particulate matter)
Bottom pressure of confined granular assemblies saturates at a certain value even this packing bed is being continuously charged. Corresponding formulation has been established to describe this interesting phenomenon. In this work, the influences of particle size and friction on the bottom stresses of granular matter were numerically investigated by discrete element method (DEM). It is found that the Janssen model can well predict the stress profile only when the size ratio of the container versus the particle is larger than 16. Moreover, a hydrostatic linear relation between apparent mass and filling mass can be obtained when the friction coefficient becomes insignificant (μ ≤ 0.01). To further interpret the Janssen effects, the granular assemblies are characterized and evaluated from the overall interactions with sidewalls, angular distribution function, void size distribution, coordination number, contact networks, contact orientation and distributions of contact forces within the p