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

I. Benedetti, R. A. Soler-Crespo, A. Pedivellano, Wei Gao, H. D. Espinosa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 (US)
Title of host publicationAdvances in Fracture and Damage Mechanics XVI - 16th FDM
EditorsPaolo Maria Mariano, Sergio Baragetti, Katia Casavola, Carmine Pappalettere, Ferri M.H. Aliabadi
PublisherTrans Tech Publications Ltd
Pages173-176
Number of pages4
ISBN (Print)9783035711684
DOIs
StatePublished - 2017
Event16th International Conference on Fracture and Damage Mechanics, 2017 - Florence, Italy
Duration: Jul 18 2017Jul 20 2017

Publication series

NameKey Engineering Materials
Volume754 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other16th International Conference on Fracture and Damage Mechanics, 2017
CountryItaly
CityFlorence
Period7/18/177/20/17

Keywords

  • Continuum damage mechanics
  • DFTB
  • Graphene oxide
  • Nanocomposites
  • Nanomechanics

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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