Exploració per tema "Nanotubes, Carbon"
Ara es mostren els items 1-12 de 12
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A finite deformation membrane based on inter-atomic potentials for the transverse mechanics of nanotubes
(2003-03)
Article
Accés obertA finite deformation hyper-elastic membrane theory based on inter-atomic potentials for crystalline films composed of a single atomic layer is developed. For this purpose, an extension of the standard Born rule that exploits ... -
An atomistic-based finite deformation membrane for single layer crystalline films
(2002-09)
Article
Accés obertA general methodology to develop hyper-elastic membrane models applicable to crystalline films one-atom thick is presented. In this method, an extension of the Born rule based on the exponential map is proposed. The ... -
Effective coarse-grained simulations of super-thick multi-walled carbon nanotubes under torsion
(2009-02)
Article
Accés obertUnder torsion and beyond the buckling point, multi-walled carbon nanotubes (MWCNTs) develop a periodic wave-like rippling morphology. Here, we show that torsional rippling deformations can be accurately described by a ... -
Elastic bending modulus of monolayer graphene
(2009-05)
Article
Accés obertAn analytic formula is derived for the elastic bending modulus of monolayer graphene based on an empirical potential for solid-state carbon atoms. Two physical origins are identified for the non-vanishing bending stiffness ... -
Finite crystal elasticity of carbon nanotubes based on the exponential Cauchy-Born rule
(2004-03)
Article
Accés obertA finite deformation continuum theory is derived from interatomic potentials for the analysis of the mechanics of carbon nanotubes. This nonlinear elastic theory is based on an extension of the Cauchy-Born rule called the ... -
Finite element methods for the non-linear mechanics of crystalline sheets and nanotubes
(Wiley and Sons, 2004-01)
Article
Accés obertThe formulation and finite element implementation of a finite deformation continuum theory for the mechanics of crystalline sheets is described. This theory generalizes standard crystal elasticity to curved monolayer ... -
High performance composite materials: Characterization of carbon fiber reinforced epoxy matrix composites with carbon nanotubes as reinforcement agent within the matrix
(Universitat Politècnica de Catalunya, 2011-11)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorThis project is about mechanical characterization of high performance, structural composite materials. Within the context of this project, a commercial, now available epoxy resin reinforced with carbon nanotubes (CNT’s) ... -
Modelling the elastic behaviour of carbon nanotube-reinforced composites
(2011)
Text en actes de congrés
Accés restringit per política de l'editorialCarbon nanotubes (CNTs), since their discovery by Lij ima in 1991 [1], are considered a new generation of reinforcement [2]. Their "nano" size structure makes them potentially free of defects, which provides them with ... -
Nonlinear mechanical response and rippling of thick multi-walled carbon nanotubes
(2003-11)
Article
Accés obertThe measured drop of the effective bending stiffness of multiwalled carbon nanotubes (MWCNTs) with increasing diameter is investigated by a generalized local quasicontinuum method. The previous hypothesis that this reduction ... -
Numerical modelling of behaviour of carbon nanotube-reinforced composites
(Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2011)
Text en actes de congrés
Accés obertSince their discovery by Lijima in 1991[1], carbon nanotubes (CNTs), are considered a new generation of reinforcement [2]. Their "nano" size structure makes them potentially free of defects, which provides them with ... -
Rippling and a phase-transforming mesoscopic model for multiwalled carbon nanotubes
(2008-04)
Article
Accés obertWe propose to model thick multiwalled carbon nanotubes as beams with non-convex curvature energy. Such models develop stressed phase mixtures composed of smoothly bent sections and rippled sections. This model is motivated ... -
Size dependent nonlinear elastic scaling of multiwalled carbon nanotubes
(2008-02)
Article
Accés obertWe characterize through large-scale simulations the nonlinear elastic response of multi-walled carbon nanotubes (MWNCNTs) in torsion and bending. We identify a unified law consisting of two distinct power-law regimes in ...