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In the modern biomedical era of developing nanodevices particularly for the disease
detection, fast and precise response is appreciated. Horn shaped double single walled carbon
nanotube system (DSWNTS) possess excellent sensing characteristics due to better adsorbing
effect. The work here focuses on determination of natural frequency of cantilever type horn shape
DSWNTS. As it is already proven fact that such a type is less fragile and more sensitive, noticing
its mechanical behavior is the need of time. Here, governing equation of motion pertaining to the
dynamic analysis is developed by applying modified couple stress theory using variational
principle. The natural frequency is determined and compared with the same of classical theory.
The size effect is also discussed. The frequency ratio is more in case of modified couple stress
theory particularly with less size effect. This work will be useful in design of low dimension
structure for vibration isolation or for mechanical biosensor.
Keywords: DSWNTS; CNT; variational principle; MCST; horn shape. |
full paper (pdf, 768 Kb)