NDLI: Variations in shear behavior among specimens with different packing patterns

Content Provider	Springer Nature Link
Author	Katagiri, Jun Matsushima, Takashi Yamada, Yasuo
Copyright Year	2014
Abstract	This paper describes variations in shear behavior among specimens with the same packing fraction but different coordination number (different packing patterns). The multi-sphere models to express grain shapes of Toyoura sand were employed in discrete-element method (DEM) simulation. Specimens with different packing patterns were produced by two methods: changing interparticle friction angle (FC method) and applying cyclic simple shear (CC method). A series of simple shear DEM simulation was carried out using the FC and CC specimens. The shear response in small strain range (secant shear modulus) of FC was larger than CC specimens, while difference in peak shear stress (bulk shear friction) between FC and CC specimens were insignificant. Strong correlation was found in the relation between secant shear modulus and coordination number of the system, as well as between the bulk shear friction and packing fraction. The initial coordination number rapidly decreases with increasing shear strain, and thereafter it reaches an isostatic value. On the other hand, the packing density required large shear strain for reaching the critical state. It was found that the initial difference in coordination number between FC and CC specimens disappeared before reaching their bulk shear frictions. Therefore, the bulk shear friction strongly correlates with the packing density.
Starting Page	891
Ending Page	901
Page Count	11
File Format	PDF
ISSN	14345021
Journal	Granular Matter
Volume Number	16
Issue Number	6
e-ISSN	14347636
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-10-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	DEM Multi-sphere model Specimen preparation method Simple shear Coordination number 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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