Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.038302
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Funding
- Center for University of Massachusetts Industry
- NSF MRSEC on Polymers at the University of Massachusetts
- U.S. DOE [DE-FG-0296, ER45612]
- NSF-DMR [0606216, NSF-CBET-0609107]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0846582, 0606216] Funding Source: National Science Foundation
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An ultrathin polymer sheet floating on a fluid forms a periodic pattern of parallel wrinkles when subjected to uniaxial compression. The wave number of the wrinkle pattern increases sharply near the fluid meniscus where the translational symmetry of this one-dimensional corrugated profile is broken. We show that the observed multiscale morphology is controlled by a new softness number that quantifies the relative strength of capillary forces at the edge and the rigidity of the bulk pattern. We discover a new elastic cascade by which the wrinkling pattern in the bulk is smoothly matched to the fine structure at the edge by a discrete series of higher Fourier modes.
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