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Dynamic Inter-Particle Force Inference in Granular Materials: Method and Application

Hurley, R. C. and Lim, K. W. and Ravichandran, G. and Andrade, J. E. (2016) Dynamic Inter-Particle Force Inference in Granular Materials: Method and Application. Experimental Mechanics, 56 (2). pp. 217-229. ISSN 0014-4851.

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Inter-particle force transmission in granular media plays an important role in the macroscopic static and dynamic behavior of these materials. This paper presents a method for inferring inter-particle forces in opaque granular materials during dynamic experiments. By linking experimental measurements of particle kinematics and volume-averaged strains to forces, the method provides a new tool for quantitatively studying force transmission and its relation to macroscopic behavior. We provide an experimental validation of the method, comparing inter-particle forces measured in a simple impact test on two-dimensional rubber grains to a finite-element simulation. We also provide an application of the method, using it to study inter-particle forces during impact of an intruder on a granular bed. We discuss the current challenges for applying the method to both model materials and real geologic materials.

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Ravichandran, G.0000-0002-2912-0001
Additional Information:© 2015 Society for Experimental Mechanics. Received: 12 November 2014; Accepted: 22 June 2015; Published online: 14 September 2015. Support by the Air Force Office of Scientific Research Grant # FA9550-12-1-0091 through the University Center of Excellence in High-Rate Deformation Physics of Heterogenous Materials is gratefully acknowledged.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0091
Subject Keywords:Granular materials; Inter-particle forces; Inverse problems; Dynamic material response
Issue or Number:2
Record Number:CaltechAUTHORS:20160316-092646662
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65389
Deposited By: Tony Diaz
Deposited On:16 Mar 2016 19:29
Last Modified:09 Mar 2020 13:19

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