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Achieving high aspect ratio wrinkles by modifying material network stress

Abstract

Wrinkle aspect ratio, or the amplitude divided by the wavelength, is hindered by strain localization transistions when an increasing global compressive stress is applied to synthetic material systems. However, many examples from living organisms show extremely high aspect ratios, such as gut villi and flower petals. We use three experimental approaches to demonstrate that these high aspect ratio structures can be achieved by modifying the network stress in the wrinkle substrate. We modify the wrinkle stress and effectively delay the strain localization transistion, such as folding, to larger aspect ratios by using a zero-stress initial wavy substrate, creating secondary network with post-curing, or using chemical stress relaxation materials. Wrinkle aspect ratio as high as 0.85, almost three times higher than common values of synthetic wrinkles, is achieved, and a quantitative framework is presented to provide understanding the different strategies and predictions for future investigations.

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Publication details

The article was received on 07 Mar 2017, accepted on 19 May 2017 and first published on 19 May 2017


Article type: Paper
DOI: 10.1039/C7SM00469A
Citation: Soft Matter, 2017, Accepted Manuscript
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    Achieving high aspect ratio wrinkles by modifying material network stress

    Y. Chen, Y. Wang, T. McCarthy and A. J. Crosby, Soft Matter, 2017, Accepted Manuscript , DOI: 10.1039/C7SM00469A

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