Auguste, AnesiaJin, LihuaSuo, ZhigangHayward, Ryan C.2015-02-042014Auguste, 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.1744-683X1744-6848http://nrs.harvard.edu/urn-3:HUL.InstRepos:13919154When 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.en-USJournal Article2015-01-25Anesia Auguste, Lihua Jin, Zhigang Suo, Ryan C. Hayward2015-02-0410.1039/C4SM01038H