Berlin 2015 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 56: Poster - Statistical Physics
DY 56.8: Poster
Thursday, March 19, 2015, 16:00–18:00, Poster A
crumpling of plastic wires in spherical cavities — ali farnudi1, javad najafi2, m reza shaebani3, and •mehdi habibi1,4 — 1Department of Physics, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran — 2Department of Experimental Physics, Saarland University, Saarbrucken, Germany — 3Department of Theoretical Physics, Saarland University, Saarbrucken, Germany — 4Van der Waals-Zeeman Institute, University of Amsterdam, Amsterdam, The Netherlands
We study the morphology of crumpled plastic wires irreversibly packed into spherical cavities. The total length of the injected wire follows a power-law dependence on the relative system size, that is the ratio of sphere and wire radii. The exponent (or, equivalently, the mass-size fractal dimension) depends on the friction coefficient between the wire and the cavity walls, reflecting friction-dependent structural differences. While ordered coil formation is partially observed at low frictions, highly disordered structures emerge at large friction limit, where the number of folds exhibits a power-law scaling in the relative system size. The probability distribution of the fold-size broadens and becomes more asymmetric for relatively larger spheres. We present a self-avoiding random walk model for the injection of the plastic wire at high friction regime, which provides a new insight into the underlying mechanism and remarkably reproduces the experimental results.