FE-calculations of stress distribution under prismatic and conical sandpiles within hypoplasticity
نویسندگان
چکیده
منابع مشابه
Fe-investigations on Shear Localizations in Granular Bodies within Hypoplasticity
A spontaneous shear localization in granular bodies is investigated with a finite element method based on a hypoplastic constitutive model. To simulate properly the formation of shear zones, a hypoplastic model was extended by polar, non-local and gradient terms to take into account a characteristic length of the microstructure. Two different rate boundary value problems were numerically analyz...
متن کاملStress distribution in sandpiles – A variational approach
Two variational closure models are proposed in order to describe stress distribution and arch formation in sandpiles located on a rigid base. The maximum strength and the maximum entropy closures are shown to yield the normal stress minimum below the pile apex. Stress distributions in sandpiles are determined numerically. The force uctuations in a model regular granular assembly are studied by ...
متن کاملStress Analysis of Rotating Thick Truncated Conical Shells with Variable Thickness under Mechanical and Thermal Loads
In this paper, thermo-elastic analysis of a rotating thick truncated conical shell subjected to the temperature gradient, internal pressure and external pressure is presented. Given the existence of shear stress in the conical shell due to thickness change along the axial direction, the governing equations are obtained based on first-order shear deformation theory (FSDT). These equations are so...
متن کاملStress propagation and Arching in Static Sandpiles
We present a new approach to the modelling of stress propagation in static granular media, focussing on the conical sandpile constructed from a point source. We view the medium as consisting of cohesionless hard particles held up by static frictional forces; these are subject to microscopic indeterminacy which corresponds macroscopically to the fact that the equations of stress continuity are i...
متن کاملFe(III) distribution varies substantially within and between atherosclerotic plaques.
PURPOSE Vulnerable atherosclerotic plaques are structurally weak and prone to rupture, presumably due to local oxidative stress. Redox active iron is linked to oxidative stress and the aim of this study was to investigate the distribution of Fe(III) in carotid plaques and its relation to vulnerability for rupture. METHODS Atherosclerotic plaques from 10 patients (three asymptomatic and seven ...
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ژورنال
عنوان ژورنال: Granular Matter
سال: 2008
ISSN: 1434-5021,1434-7636
DOI: 10.1007/s10035-008-0102-6