Quasistatic rheology, force transmission and fabric properties of a packing of irregular polyhedral particles
By É. Azéma, F. Radjai, G. Saussine. 2008
244 citations recorded by the source corpus.
By means of contact dynamics simulations, we investigate a dense packing composed of polyhedral particles under quasistatic shearing. The effect of particle shape is analyzed by comparing the polyhedra packing with a packing of similar characteristics except for the spherical shape of the particles. The polyhedra packing shows higher shear stress and dilatancy but similar stress-dilatancy relation compared to the sphere packing. A harmonic approximation of granular fabric is presented in terms of branch vectors (connecting particle centers) and contact force components along and perpendicular to the branch vectors. It is found that the origin of enhanced shear strength of the polyhedra packing lies in its higher force anisotropy with respect to the sphere packing which has a higher fabric anisotropy. Various contact types (face-vertex, face-face, etc) contribute differently to force transmission and fabric anisotropy. In particular, most face-face contacts belong to strong force chains along the major principal stress direction whereas vertex-face contacts are correlated with weak forces and oriented on average along the minor principal stress direction in steady shearing.
Subfields: Computational Mechanics, Food Science, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/62511a6a8681a45804e3eb43c05bf22c6d93aa3b
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In Computational Mechanics
In Materials Chemistry
Citations in the corpus
- Effects of particle asphericity on the macro- and micro-mechanical behaviors of granular assemblies (2017, background): “Both of them affect each other, contributing to the stress tensor [4,6,11,25,32,37,69].”
- 3D particle shape modelling and optimization through proper orthogonal decomposition (2017, unknown): “A number of numerical studies [9–16], as well as laboratory experiments [13], have shown the strong influence of grain shape on granular material behaviour, in both quasistatic and inertial flow regimes.”