Journal
NANOMATERIALS
Volume 11, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/nano11040923
Keywords
single-walled carbon nanotubes; thermal– electro-mechanical coupling; Bernoulli– Euler beam theory; independent stiffness
Categories
Funding
- National Natural Science Foundation of China [11562009, 12050001]
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The study introduces a new model to analyze the mechanical properties of SWCNTs under temperature and electrostatic fields, revealing that the classical beam model underestimates their influence.
The potential application field of single-walled carbon nanotubes (SWCNTs) is immense, due to their remarkable mechanical and electrical properties. However, their mechanical properties under combined physical fields have not attracted researchers' attention. For the first time, the present paper proposes beam theory to model SWCNTs' mechanical properties under combined temperature and electrostatic fields. Unlike the classical Bernoulli-Euler beam model, this new model has independent extensional stiffness and bending stiffness. Static bending, buckling, and nonlinear vibrations are investigated through the classical beam model and the new model. The results show that the classical beam model significantly underestimates the influence of temperature and electrostatic fields on the mechanical properties of SWCNTs because the model overestimates the bending stiffness. The results also suggest that it may be necessary to re-examine the accuracy of the classical beam model of SWCNTs.
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