6533b829fe1ef96bd12899ee
RESEARCH PRODUCT
A continuum damage model for functionalized graphene membranes based on atomistic simulations
Rafael A. Soler-crespoAntonio PedivellanoAntonio PedivellanoHoracio D. EspinosaIvano BenedettiIvano BenedettiWei GaoWei Gaosubject
NanomechanicMaterials scienceNanocompositeNanocompositeContinuum (measurement)Mechanical EngineeringFunctionalized grapheneDFTBNanotechnology02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesContinuum damage mechanicMembraneContinuum damage mechanicsMechanics of MaterialsGeneral Materials ScienceMechanics of MaterialMaterials Science (all)0210 nano-technologyNanomechanicsGraphene oxidedescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-09-01 |