Regensburg 2013 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Poster II

DY 33.32: Poster

Donnerstag, 14. März 2013, 17:00–19:00, Poster C

Defect patterns in a model of wrinkles — •Achim Guckenberger, Alexei Krekhov, and Walter Zimmermann — Universität Bayreuth, Theoretische Physik, 95440 Bayreuth, Germany

Anisotropic pattern forming systems may exhibit new scenarios of pattern formation, when the system properties change perpendicularly or obliquely to the direction of the wave vector of the pattern. This is demonstrated for a two-dimensional model of wrinkles, whereby wrinkles may form on top of an elastomer, in which the elastic properties are varied in space. Within the model the critical wavenumber changes its value as a function of space in order to mimic the wrinkle formation on top of an inhomogeneous elastomer.

We show, that beyond a certain amplitude of the spatial variation of the critical waven umber the so-called Eckhaus stability-band of the possible wave number of wrinkles vanishes immediately above threshold and defect patterns may occur. Phase diagrams of this transition are presented and discussed.