Measuring order in the isotropic packing of elastic rods

Details Measuring order in the isotropic packing of elastic rods Measuring order in the isotropic packing of elastic rods

2011-02-25

arxiv.org/abs/1102.5279v1

Physics

Condensed Matter

Materials Science

4 pages, 5 figures

Scientific paper

The packing of elastic bodies has emerged as a paradigm for the study of macroscopic disordered systems. However, progress is hampered by the lack of controlled experiments. Here we consider a model experiment for the isotropic two-dimensional confinement of a rod by a central force. We seek to measure how ordered is a folded configuration and we identify two key quantities. A geometrical characterization is given by the number of superposed layers in the configuration. Using temporal modulations of the confining force, we probe the mechanical properties of the configuration and we define and measure its effective compressibility. These two quantities may be used to build a statistical framework for packed elastic systems.

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