The role of substrate pre-stretch in post-wrinkling bifurcations

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The role of substrate pre-stretch in post-wrinkling bifurcations

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Title: The role of substrate pre-stretch in post-wrinkling bifurcations
Author: Auguste, Anesia; Jin, Lihua; Suo, Zhigang; Hayward, Ryan C.

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Citation: Auguste, Anesia, Lihua Jin, Zhigang Suo, and Ryan C. Hayward. 2014. “The Role of Substrate Pre-Stretch in Post-Wrinkling Bifurcations.” Soft Matter 10 (34): 6520. doi:10.1039/c4sm01038h.
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Abstract: When a stiff film on a soft substrate is compressed, the surface of the film forms wrinkles, with tunable wavelengths and amplitudes that enable a variety of applications. As the compressive strain increases, the film undergoes post-wrinkling bifurcations, leading to period doubling and eventually to formation of localized folds or ridges. Here we study the post-wrinkling bifurcations in films on pre-stretched substrates. Through a combination of experiments and simulations, we demonstrate that pre-stretched substrates not only show substantial shifts in the critical strain for the onset of post-wrinkling bifurcations, but also exhibit qualitatively different post-wrinkled states. In particular, we report on the stabilization of wrinkles in films on pre-tensioned substrates and the emergence of ‘chaotic’ morphologies in films on pre-compressed substrates.
Published Version: doi:10.1039/C4SM01038H
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