Direct numerical simulations of three-dimensional surface instability patterns in thin film-compliant substrate structures.

ABSTRACT: A comprehensive numerical study of three-dimensional surface instability patterns is presented. The formation of wrinkles is a consequence of deformation instability when a thin film, bonded to a compliant substrate, is subject to in-plane compressive loading. We apply a recently developed computational approach to directly simulate complex surface wrinkling from pre-instability to post-instability in a straightforward manner, covering the entire biaxial loading spectrum from pure uniaxial to pure equi-biaxial compression. The simulations use embedded imperfections with perturbed material properties at the film-substrate interface. This approach not only triggers the first bifurcation mode but also activates subsequent post-buckling states, thus capable of predicting the temporal evolution

SUBMITTER: Nikravesh S 

PROVIDER: S-EPMC8361117 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature