Development of Empirical Relations for the Transversely Isotropic Properties of Zigzag, Armchair and Chiral Single-Walled Carbon Nanotubes

Advanced Composites Letters

Letter

S. Gopalakrishnan¹  B. Nageswara Rao²  S.K. Jalan³ 

[1] Department of Aerospace Engineering, Indian Institute of Science, Banglore-560012, India;School of Mechanical and Civil Sciences, KL University, Green Fields, Vaddeswaram-522502, India;Structural Dynamic Response and Stability Analysis Division, Vikram Sarabhai Space Centre, Trivandrum-695022, India;

关键词: Mechanical properties;    finite element analysis;    carbon nanotubes;    equivalent beams;    continuum mechanics;    thick-walled cylinders;    tensile load;    pressure load;    torsion load;   

DOI  :  10.1177/096369351202100402

 received in 2012-06-09, accepted in 2012-08-02,  发布年份 2012

来源: Sage Journals

【 摘 要 】

Finite element analysis has been performed to evaluate transversely isotropic properties of the single walled carbon nanotubes (SWCNTs). Finite element models of SWCNTs are generated by specifying the C-C bond rigidities (which are arrived by equating the energies from molecular mechanics and continuum mechanics). The five independent transversely isotropic properties for different chiralities are evaluated using the stress fields of thick-walled cylinders and the elastic deformations of SWCNTs subjected to pure extension, internal pressure and pure torsion loads. The adequacy of the elastic properties is demonstrated through modelling of an equivalent overall orthotropic hollow thick-walled cylinder under different loading conditions. Empirical relations are provided for the five independent elastic constants useful for armchair, zigzag and chiral zigzag SWCNTs.

【 授权许可】

Unknown   
© 2012 SAGE Publications Ltd

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