CUED Publications database

Mapping forces in 3D elastic assembly of grains

Saadatfar, M and Sheppard, AP and Senden, TJ and Kabla, AJ Mapping forces in 3D elastic assembly of grains. (Unpublished)

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Our understanding of the elasticity and rheology of disordered materials, such as granular piles, foams, emulsions or dense suspensions relies on improving experimental tools to characterize their behaviour at the particle scale. While 2D observations are now routinely carried out in laboratories, 3D measurements remain a challenge. In this paper, we use a simple model system, a packing of soft elastic spheres, to illustrate the capability of X-ray microtomography to characterise the internal structure and local behaviour of granular systems. Image analysis techniques can resolve grain positions, shapes and contact areas; this is used to investigate the material's microstructure and its evolution upon strain. In addition to morphological measurements, we develop a technique to quantify contact forces and estimate the internal stress tensor. As will be illustrated in this paper, this opens the door to a broad array of static and dynamical measurements in 3D disordered systems

Item Type: Article
Uncontrolled Keywords: cond-mat.soft cond-mat.soft cond-mat.dis-nn cond-mat.mes-hall
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 20:24
Last Modified: 10 Apr 2021 00:27