Structure of hexapod 3D packings: understanding the global stability from the local organization
1 Laboratoire de Mécanique et Génie Civil, Université de Montpellier, CNRS, Montpellier, France
2 Department of Physics & Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708, USA
3 Institute for Computational Design, University of Stuttgart, Stuttgart, Germany
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Published online: 30 June 2017
Aggregates of non-convex particles have shown to be particularly stable which makes them good candidates to design new lightweight and reversible structures. However, few is known about the fundamental reason of their stability. In this paper we presents a novel experimental method to investigate the local structure of piles made of hexapod particles. This method is based on X-ray scanning and on an accurate homemade particle detection code. It permits to get the position and orientation of each particle as well as to detect their contact points. Measurement of the coordination numbers, statistics of the contact positions and local density evaluation for different packing configurations show a good agreement with the previous studies carried out at the global scale and permits to explain the main local mechanisms leading to stable structures.
© The Authors, published by EDP Sciences, 2017
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