TY - CONF
T1 - A continuum damage model for functionalized graphene membranes based on atomistic simulations
AU - Benedetti, Ivano
AU - Gao, Wei
AU - Benedetti, null
AU - Soler-Crespo, null
AU - Pedivellano, null
AU - Espinosa, null
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Continuum damage mechanics
KW - DFTB
KW - Graphene oxide
KW - Materials Science (all)
KW - Mechanical Engineering
KW - Mechanics of Materials
KW - Nanocomposites
KW - Nanomechanics
KW - Continuum damage mechanics
KW - DFTB
KW - Graphene oxide
KW - Materials Science (all)
KW - Mechanical Engineering
KW - Mechanics of Materials
KW - Nanocomposites
KW - Nanomechanics
UR - http://hdl.handle.net/10447/246480
UR - http://www.scientific.net/
M3 - Other
SP - 173
EP - 176
ER -