Dilatancy and friction in sheared granular media
نویسندگان
چکیده
منابع مشابه
ar X iv : c on d - m at / 9 90 83 59 v 1 2 5 A ug 1 99 9 Dilatancy and friction in sheared granular media
We introduce a simple model to describe the frictional properties of granular media under shear. We model the friction force in terms of the horizontal velocity ẋ and the vertical position z of the slider, interpreting z as a constitutive variable characterizing the contact. Dilatancy is shown to play an essential role in the dynamics, inducing a stick-slip instability at low velocity. We compu...
متن کاملStress Fluctuations in Continuously Sheared Granular Media
Physics|Solid State) STRESS FLUCTUATIONS IN CONTINUOUSLY SHEARED GRANULAR MEDIA by Brian J. Miller Department of Physics Duke University
متن کاملAvalanches in anisotropic sheared granular media
We study the influence of particle shape anisotropy on the occurrence of avalanches in sheared granular media. We use molecular dynamic simulations to calculate the relative movement of two tectonic plates. Our model considers irregular polygonal particles constituting the material within the shear zone. We find that the magnitude of the avalanches is approximately independent of particle shape...
متن کاملLiquid migration in sheared unsaturated granular media
We show how liquid migrates in sheared unsaturated granular media using a grain scale model for capillary bridges. Liquid is redistributed to neighboring contacts after rupture of individual capillary bridges leading to redistribution of liquid on large scales. The liquid profile evolution coincides with a recently developed continuum description for liquid migration in shear bands. The velocit...
متن کاملDilatancy in slow granular flows.
When walking on wet sand, each footstep leaves behind a temporarily dry impression. This counterintuitive observation is the most common illustration of the Reynolds principle of dilatancy: that is, a granular packing tends to expand as it is deformed, therefore increasing the amount of porous space. Although widely called upon in areas such as soil mechanics and geotechnics, a deeper understan...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal E
سال: 2000
ISSN: 1292-8941
DOI: 10.1007/s101890050052