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Phys Rev Lett. 2012 Sep 28;109(13):134301. Epub 2012 Sep 26.

Slack dynamics on an unfurling string.

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Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA.


An arch will grow on a rapidly deployed thin string in contact with a rigid plane. We present a qualitative model for the growing structure involving the amplification, rectification, and advection of slack in the presence of a steady stress field, validate our assumptions with numerical experiments, and pose new questions about the spatially developing motions of thin objects.

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