Minimal resonances in annular non-Euclidean strips

Details Minimal resonances in annular non-Euclidean strips Minimal resonances in annular non-Euclidean strips

2010-07-16

arxiv.org/abs/1007.2862v2

Phys. Rev. E 82, 056601 (2010)

Physics

Condensed Matter

Materials Science

14 pages, 13 figures. Published version. Updated references and added 2 figures

Scientific paper

10.1103/PhysRevE.82.056601

Differential growth processes play a prominent role in shaping leaves and biological tissues. Using both analytical and numerical calculations, we consider the shapes of closed, elastic strips which have been subjected to an inhomogeneous pattern of swelling. The stretching and bending energies of a closed strip are frustrated by compatibility constraints between the curvatures and metric of the strip. To analyze this frustration, we study the class of "conical" closed strips with a prescribed metric tensor on their center line. The resulting strip shapes can be classified according to their number of wrinkles and the prescribed pattern of swelling. We use this class of strips as a variational ansatz to obtain the minimal energy shapes of closed strips and find excellent agreement with the results of a numerical bead-spring model. Within this class of strips, we derive a condition under which a strip can have vanishing mean curvature along the center line.

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