Wrinkles Riding Waves in Soft Layered Materials
Abstract
The formation of periodic wrinkles in soft layered materials due to mechanical instabilities is prevalent in nature and has been proposed for use in multiple applications. However, such phenomena have been explored predominantly in quasi-static settings. In this work, we measure the dynamics of soft elastomeric blocks with stiff surface films subjected to high-speed impact, and observe wrinkles forming along with, and riding upon, waves propagating through the system. We analyze our measurements with large-deformation, nonlinear visco-hyperelastic Finite Element simulations coupled to an analytical wrinkling model. The comparison between the measured and simulated dynamics shows good agreement, and suggests that inertia and viscoelasticity play an important role. This work encourages future studies of the dynamics of surface instabilities in soft materials, including large-deformation, highly nonlinear morphologies, and may have applications to areas including impact mitigation, soft electronics, and the dynamics of soft sandwich composites.
Cite
@article{arxiv.1810.06624,
title = {Wrinkles Riding Waves in Soft Layered Materials},
author = {Maroun Abi Ghanem and Xudong Liang and Brittany Lydon and Liam Potocsnak and Thorsen Wehr and Samantha Hoang and Shengqiang Cai and Nicholas Boechler},
journal= {arXiv preprint arXiv:1810.06624},
year = {2018}
}