NDLI: A flow rule incorporating the fabric and non-coaxiality in granular materials

Content Provider	Springer Nature Link
Author	Shaverdi, Homayoun Taha, Mohd. Raihan Kalantary, Farzin
Copyright Year	2014
Abstract	Deficiencies of constitutive models in prediction of dilatancy are often attributed to simplifications associated with flow rules such as assumptions of isotropy and coaxiality. It is thus proposed here to develop a comprehensive flow rule for granular materials by including the effect of fabric and without the assumption of coaxiality. A second-order tensor is introduced as a fabric for the distribution of contact normals and contact forces. By using the energy principle in micro-mechanical scale and a suitable dissipation mechanism in granular materials, a stress-dilatancy relation is obtained. Fabric plays a “bridge-like” role in the dilatancy and non-coaxiality. Non-coaxialities between stress-strain-fabric are attributed to the non-coaxiality between stress-fabric and strain-fabric. In this formulation the constants for modeling fabric depend on non-coaxiality of the system rather than the history that determines such a state. Ability of this stress-fabric-dilatancy for modeling the non-coaxiality shows that this relation can predict the behavior of granular materials in the presence of the rotation of principal stress axes.
Starting Page	675
Ending Page	685
Page Count	11
File Format	PDF
ISSN	14345021
Journal	Granular Matter
Volume Number	16
Issue Number	5
e-ISSN	14347636
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-09-06
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics of dilatancy Fabric Non-coaxiality Micromechanics Granular materials Soft and Granular Matter, Complex Fluids and Microfluidics Engineering Fluid Dynamics Materials Science Geoengineering, Foundations, Hydraulics Industrial Chemistry/Chemical Engineering Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanics of Materials Materials Science

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