|Graphene Foam: Uniaxial Tension Behavior and Fracture Mode Based on a Mesoscopic Model|
|Pan DX(潘斗兴); Wang C(王超); Wang ZQ(王自强); Yao YG(姚裕贵); Yao, YG (reprint author), Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China.; Wang, TC (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
|Source Publication||ACS NANO
|Abstract||Because of the combined advantages of both porous materials and two-dimensional (2D) graphene sheets, superior mechanical properties of three-dimensional (3D) graphene foams have received much attention from material scientists and energy engineers. Here, a 2D mesoscopic graphene model (Modell. Simul. Mater. Sci. Eng. 2011, 19, 054003), was expanded into a 3D bonded graphene foam system by utilizing physical cross-links and van der Waals forces acting among different mesoscopic graphene flakes by considering the debonding behavior, to evaluate the uniaxial tension behavior and fracture mode based on in situ SEM tensile testing (Carbon 2015, 85, 299). We reasonably reproduced a multipeak stress strain relationship including its obvious yielding plateau and a ductile fracture mode near 45 plane from the tensile direction including the corresponding fracture morphology. Then, a power scaling law of tensile elastic modulus with mass density and an anisotropic strain-dependent Poisson's ratio were both deduced. The mesoscopic physical mechanism of tensile deformation was clearly revealed through the local stress state and evolution of mesostructure. The fracture feature of bonded graphene foam and its thermodynamic state were directly navigated to the tearing pattern of mesoscopic graphene flakes. This study provides an effective way to understand the mesoscopic physical nature of 3D graphene foams, and hence it may contribute to the multiscale computations of micro/meso/macromechanical performances and optimal design of advanced graphene-foam-based materials.|
Coarse-grained Molecular Dynamics
Multipeak Stress Strain Curve
Power Scaling Law
Multiscale Physics Mechanics
; POLYETHERIMIDE POLYMER
; POISSONS RATIO
|WOS Research Area||Chemistry
; Science & Technology - Other Topics
; Materials Science
|WOS Subject||Chemistry, Multidisciplinary
; Chemistry, Physical
; Nanoscience & Nanotechnology
; Materials Science, Multidisciplinary
|Funding Organization||Ministry of Science and Technology (MOST) Project of China(2014CB920903)
; National Natural Science Foundation (NSF) of China(11574029
; National Key R&D Program of China(2016YFA0300600)
; National Basic Research Program of China ("973" Project)(2012CB937500)
; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040503)
|Corresponding Author||Yao, YG (reprint author), Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China.; Wang, TC (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.|
Pan DX,Wang C,Wang ZQ,et al. Graphene Foam: Uniaxial Tension Behavior and Fracture Mode Based on a Mesoscopic Model[J]. ACS NANO,2017,11(9):8988-8997.
潘斗兴,王超,王自强,姚裕贵,Yao, YG ,&Wang, TC .(2017).Graphene Foam: Uniaxial Tension Behavior and Fracture Mode Based on a Mesoscopic Model.ACS NANO,11(9),8988-8997.
潘斗兴,et al."Graphene Foam: Uniaxial Tension Behavior and Fracture Mode Based on a Mesoscopic Model".ACS NANO 11.9(2017):8988-8997.
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