Flat, wrinkled, or ridged: Relaxation of an elastic film on a viscous substrate undergoing continuous compression.

ABSTRACT: We conduct a finite element computational study of the dynamics of a thin elastic film bonded to a much thicker viscous substrate undergoing compression at a fixed rate. The applied compression tends to continuously increase the strain, and hence the elastic energy, of the film. In contrast to the well-studied case of a soft elastic substrate, a viscous substrate cannot store elastic energy; instead it regulates the kinetics of the various mechanisms that dissipate elastic energy of the film. Sufficiently short films remain flat because shear flow in the liquid near the ends allows rapid relaxation of the strain over the entire film length. In longer films, end-relaxation cannot relax film strain in the mid-section, which therefore buckles. Buckles initially appear as packets of approximat

SUBMITTER: Guan X 

PROVIDER: S-EPMC11259052 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature