A continuum damage model for functionalized graphene membranes based on atomistic simulations

Ivano Benedetti, Wei Gao, Benedetti, Soler-Crespo, Pedivellano, Espinosa

Research output: Contribution to conferenceOtherpeer-review

Abstract

A continuum model for GO membranes is developed in this study. The model is built representing the membrane as a two-dimensional, heterogeneous, two-phase continuum and the constitutive behavior of each phase (graphitic or oxidized) is built based on DFTB simulations of representative patches. A hyper-elastic continuum model is employed for the graphene areas, while a continuum damage model is more adequate for representing the behavior of oxidized regions. A finite element implementation for GO membranes subjected to degradation and failure is then implemented and, to avoid localization instabilities and spurious mesh sensitivity, a simple crack band model is adopted. The developed implementation is then used to investigate the existence of GO nano-representative volume elements.
Original languageEnglish
Pages173-176
Number of pages4
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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