Date: Dec 20, 2012 2:27 PM
Author: Sam Wormley
Subject: Mathematical model developed for foldable rings

Mathematical model developed for foldable rings
> http://blogs.physicstoday.org/newspicks/2012/12/mathematical-model-developed-for-foldable-rings/
> http://www.nature.com/news/the-maths-of-the-pop-up-tent-1.12077


> Flexible rings that fold up on themselves into saddle shapes or stacks of interlinked loops are most recognizable in such everyday items as pop-up tents and laundry baskets. A group of researchers led by Alain Jonas of the Catholic University of Leuven in Belgium has determined that the way these rings behave depends on a single characteristic known as overcurvature, or how much more curved the ring is than a flat circle of the same circumference.