Artículos de revistas
Modeling the auxetic transition for carbon nanotube sheets
Registro en:
Physical Review B. Amer Physical Soc, v. 78, n. 11, 2008.
1098-0121
WOS:000259690800090
10.1103/PhysRevB.78.115408
Autor
Coluci, VR
Hall, LJ
Kozlov, ME
Zhang, M
Dantas, SO
Galvao, DS
Baughman, RH
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) A simple model is developed to predict the complex mechanical properties of carbon nanotube sheets (buckypaper) [L. J. Hall et al., Science 320, 504 (2008)]. Fabricated using a similar method to that deployed for making writing paper, these buckypapers can have in-plane Poisson's ratios changed from positive to negative, becoming auxetic, as multiwalled carbon nanotubes are increasingly mixed with single-walled carbon nanotubes. Essential structural features of the buckypapers are incorporated into the model: isotropic in-plane mechanical properties, nanotubes preferentially oriented in the sheet plane, and freedom to undergo stress-induced elongation by both angle and length changes. The expressions derived for the Poisson's ratios enabled quantitative prediction of both observed properties and remarkable new properties obtainable by structural modification. 78 11 National Science Foundation [DMI-0609115] Air Force Office of Scientific Research [FA9550-05-C-0088] Lintec Corporation Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) National Science Foundation [DMI-0609115] Air Force Office of Scientific Research [FA9550-05-C-0088]