Influence of particle elasticity in shear testers

被引：30

作者：

Kadau, D ^{[1
]}

Schwesig, D

Theuerkauf, J

Wolf, DE

机构：

[1] Duisburg Essen Univ, Dept Phys, D-47048 Duisburg, Germany

[2] Dow Chem Co USA, Solids Proc Lab, Freeport, TX 77541 USA

来源：

GRANULAR MATTER | 2006年 / 8卷 / 01期

关键词：

granular matter; Contact Dynamics Simulations; Molecular Dynamics Simulation; Distinct Element Method; biaxial test; shearing; shear tester; steady state flow; elasticity;

D O I：

10.1007/s10035-005-0217-y

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Two dimensional simulations of non-cohesive granular matter in a biaxial shear tester are discussed. The effect of particle elasticity on the mechanical behavior is investigated using two complementary distinct element methods (DEM): Soft particle molecular dynamics simulations (Particle Flow Code, PFC) for elastic particles and contact dynamics simulations (CD) for the limit of perfectly rigid particles. As soon as the system dilates to form shear bands, it relaxes the elastic strains so that one finds the same stresses for rigid respectively elastic particles in steady state flow. The principal stresses in steady state flow are determined. They are proportional to each other, giving rise to an effective macroscopic friction coefficient which is about 10% smaller than the microscopic friction coefficient between the grains.

引用

页码：35 / 40

页数：6

共 24 条

[1]

[Anonymous], 1996, COMPUTATIONAL PHYS

[2]

[Anonymous], 1992, PROC CONTACT MECH IN

[3]

[Anonymous], 1987, ANAL COMPUTATIONAL M

[4]

Brendel L., 2004, PHYS GRANULAR MEDIA

[5]

Cundall P.A., 1971, P S INT SOC ROCK MEC

[6]

DISCRETE NUMERICAL-MODEL FOR GRANULAR ASSEMBLIES [J].

CUNDALL, PA ;

STRACK, ODL .

GEOTECHNIQUE, 1979, 29 (01) :47-65

[7]

*IT CONS, PART FLOW COD 2 DIM

[8]

JANSSEN RJM, CHEM ENG TECH, V26, P147

[9]

The non-smooth contact dynamics method [J].

Jean, M .

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 1999, 177 (3-4) :235-257

[10]

Pore stabilization in cohesive granular systems [J].

Kadau, D ;

Bartels, G ;

Brendel, L ;

Wolf, DE .

PHASE TRANSITIONS, 2003, 76 (4-5) :315-331

← 1 2 3 →