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Título:
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Modelling viscoelastic behaviour of carbón nanotube-reinforced thermo-plastics
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Autor/a:
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Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomón, Ramón Omar
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria; Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria Nàutiques; Universitat Politècnica de Catalunya. (MC)2 - Grup de Mecànica Computacional en Medis Continus |
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Abstract:
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Carbon nanotubes (CNTs), since their discovery by Lijima (S. Lijima, Nature, 354:56-58
(1991)), are considered a new generation of reinforcement. Their "nano" size structure makes them
potentially free of defects, which provides them with excellent physical properties. There are two main
nanotube types: single wall nanotubes (SWCNTs), which are made of a single wall tube; and multiwall
nanotubes (MWCNTs), which consist in several concentric walls, one inside the other.
A key factor for the reinforcement efficiency in a composite it is the interface bonding between the
CNTs and the matrix. This work presents a new constitutive model to predict the mechanical performance
of composites made of a thermo-plastic matrix reinforced with CNTs. The model takes into account
explicitly the mechanical contribution of the interface between the matrix and the CNTs (F. Otero et. al.,
Comp Structures, 94:2920-2930 (2012)). The constitutive model is based in the mixing theory, which
obtains the composite performance from the response of each constituent component, each one simulated
with its own constitutive law. The model has been implemented into an in-house FEM code: PLCd.
As an application example, this code is used to predict the mechanical properties of a straight beam
with different material configurations. In this case, a viscoelastic constitutive model is proposed for the
polymeric matrix. The viscous response within the elastic range of the materials is studied. This response
shows a high capacity of energy dissipation in composites reinforced with MWCNTs. |
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Abstract:
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Peer Reviewed |
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Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials
-FEM
-Carbon nanotubes
-Composites
-Compòsits
-Nanotubs |
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Derechos:
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Tipo de documento:
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Artículo - Versión publicada
Objeto de conferencia |
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Editor:
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Asociación Argentina de Mecánica Computacional
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Compartir:
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