Regensburg 2016 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 31: Poster - Pattern Formation
DY 31.13: Poster
Dienstag, 8. März 2016, 18:15–21:00, Poster C
Branched-wrinkles in inhomogeneous film-on-substrate systems — •Roland Aichele1, Badr Kaoui1,2, Falko Ziebert1,3, and Walter Zimmermann1 — 1Theoretische Physik, Universitaet Bayreuth, Bayreuth, Germany — 2Biomechanics and Bioengineering, Universite de Technlogie de Compiegne, Compiegne, France — 3Physikalisches Institut, Albert-Ludwigs-Universitaet Freiburg, Freiburg, Germany
We model wrinkle formation in thin-solid films supported by soft substrates and subjected to axial compression. Spatial variations of the elasticity of the substrate or of the thin film lead effectively to a spatial variation of the range of accessible wavle-lengths of wrinkle's, and beyond a critical amplitude of the wave-length modulation stable branched wrinkles may emerge. The branching points of the wirnkles are located along step like parameter changes. For a given parameter set, one finds a whole familiy of stable branched periodic pattern and it depends on the initial conditions which of the stable pattern is reached. If parameters change smoothly, the branching points connecting the wrinkles of different wavelength show complex orderings. Smooth parameter variations reduce the stability domains of branched pattern and may lead to complex ordering of the branching points.
B. Kaoui, A. Guckenberger, A. Krekhov, F. Ziebert, W. Zimmermann, New J. Phys. 17, 103015 (2015);B. A. Glatz, M. Tebbe, B. Kaoui, R. Aichele, C. Kuttner, A. E. Schedl, H.-W. Schmidt, W. Zimmermann, A. Fery, Soft Matter 11, 3332 (2015)