Material-stiffening suppresses elastic fingering and fringe instabilities
Name
Zhao_Material-stiffening.pdf
Description
Accepted version
Size
2.41 MB
Format
Adobe PDF
Checksum (MD5)
2bf5aba1b5c27dbd152149689eeef09a
Author(s)
Lin, Shaoting
Mao, Yunwei
Yuk, Hyunwoo
Zhao, Xuanhe
Date Issued
2018
Journal
International Journal of Solids and Structures
Publisher
Elsevier BV
Version
Author's final manuscript
Abstract
© 2018 When a confined elastic layer is under tension, undulations can occur at its exposed surfaces, giving the fingering or fringe instability. These instabilities are of great concern in the design of robust adhesives, since they not only initiate severe local deformations in adhesive layers but also cause non-monotonic overall stress vs. stretch relations of the layers. Here, we show that the strain stiffening of soft elastic materials can significantly delay and even suppress the fringe and fingering instabilities, and give monotonic stress vs. stretch relations. Instability development requires local large deformation, which can be inhibited by material-stiffening. We provide a quantitative phase diagram to summarize the stiffening's effects on the instabilities and stress vs. stretch relations in confined elastic layers. We further use numerical simulations and experiments to validate our findings.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.IJSOLSTR.2018.01.022
