منابع مشابه
Particle shape effects on the stress response of granular packings.
We present measurements of the stress response of packings formed from a wide range of particle shapes. Besides spheres these include convex shapes such as the Platonic solids, truncated tetrahedra, and triangular bipyramids, as well as more complex, non-convex geometries such as hexapods with various arm lengths, dolos, and tetrahedral frames. All particles were 3D-printed in hard resin. Well-...
متن کاملFrustration and slow dynamics of granular packings
Dynamical processes in granular media show fascinating behavior @1–4#. The particular role of disorder and fluctuations in granular dynamics has led several authors @1,5–7# to propose an analogy to frustrated statistical systems such as spin glasses @8#. Recently a frustrated lattice gas model has been introduced to describe static and dynamic properties of granular materials @9#. This microsco...
متن کاملHyperstaticity and loops in frictional granular packings
The hyperstatic nature of granular packings of perfectly rigid disks is analyzed algebraically and through numerical simulation. The elementary loops of grains emerge as a fundamental element in addressing hyperstaticity. Loops consisting of an odd number of grains behave differently than those with an even number. For odd loops, the latent stresses are exterior and are characterized by the sum...
متن کاملNonlinear elastic stress response in granular packings.
We study the nonlinear elastic response of a two-dimensional material to a localized boundary force, with the particular goal of understanding the differences observed between isotropic granular materials and those with hexagonal anisotropy. Corrections to the classical Boussinesq result for the stresses in an infinite half space of a linear, isotropic material are developed in a power series i...
متن کاملStructure of plastically compacting granular packings.
In this paper we present results of structural studies of compacting experimental systems of ductile grains in two and three dimensions. The high precision of our two-dimensional experiments enables a detailed study of the evolution of coordination numbers and local crystalline arrangements as a function of the packing fraction. The structure in both dimensions deviates considerably from that o...
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ژورنال
عنوان ژورنال: Acta Materialia
سال: 2017
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2017.04.057