Morphologies of expansion ridges of elastic thin films onto a substrate

Details Morphologies of expansion ridges of elastic thin films onto a substrate Morphologies of expansion ridges of elastic thin films onto a substrate

2005-09-09

arxiv.org/abs/cond-mat/0509252v1

Physics

Condensed Matter

Statistical Mechanics

10 pages, 9 figures

Scientific paper

10.1103/PhysRevE.74.036207

We consider a model of a thin film elastically attached to a rigid substrate. In the case in which the film expands relative to the substrate and assuming certain non-linear elastic behavior of the film, expansion ridges may appear, in which the material has collapsed, and the density is higher. By studying numerically this process, the possible morphologies of these collapsed regions are presented. They range from circular spots and straight stripes, to wiggle polygonal patterns and ring-shaped domains. The similarity of some of these results with patterns observed in delamination of thin films and bi-phase epitaxial growth is emphasized.

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