Items related to Non-classical Wave Dynamics of Ultrathin Structures

Non-classical Wave Dynamics of Ultrathin Structures - Softcover

Narendar, S.

 
9783656295334: Non-classical Wave Dynamics of Ultrathin Structures
Softcover
ISBN 10: 3656295336 ISBN 13: 9783656295334
Publisher: Grin Verlag, 2012

Synopsis

Research Paper (postgraduate) from the year 2012 in the subject Engineering - Aerospace Technology, grade: "-", Indian Institute of Science, course: Aerospace Engineering, language: English, abstract: In this paper, the nonlocal elasticity theory has been incorporated into classical 1D-rod model to capture unique features of the rod like structures at Nanoscale, which are considered as ultra-thin structures, under the umbrella of continuum mechanics theory. The strong effect of the nanoscale has been obtained which leads to substantially different wave behaviors of nanoscale-rods from those of macroscopic rods. Nonlocal bar model is developed for nanorods. The analysis shows that the wave characteristics are highly over estimated by the classical rod model, which ignores the effect of small-length scale. The studies also show that the nonlocal scale parameter introduces certain band gap region in axial wave mode where no wave propagation occurs. This is manifested in the spectrum cures as the region where the wavenumber tends to infinite (or wave speed tends to zero). These results are also compared with the Born-Karman model and also with the second and fourth order strain gradient models. The results can provide useful guidance for the study and design of the next generation of nanodevices that make use of the wave propagation properties of single-walled carbon nanotubes.

"synopsis" may belong to another edition of this title.

From the Back Cover

Research Paper (postgraduate) from the year 2012 in the subject Engineering - Aerospace Technology, grade: "-", Indian Institute of Science, course: Aerospace Engineering, language: English, abstract: In this paper, the nonlocal elasticity theory has been incorporated into classical 1D-rod model to capture unique features of the rod like structures at Nanoscale, which are considered as ultra-thin structures, under the umbrella of continuum mechanics theory. The strong effect of the nanoscale has been obtained which leads to substantially different wave behaviors of nanoscale-rods from those of macroscopic rods. Nonlocal bar model is developed for nanorods. The analysis shows that the wave characteristics are highly over estimated by the classical rod model, which ignores the effect of small-length scale. The studies also show that the nonlocal scale parameter introduces certain band gap region in axial wave mode where no wave propagation occurs. This is manifested in the spectrum cures as the region where the wavenumber tends to infinite (or wave speed tends to zero). These results are also compared with the Born-Karman model and also with the second and fourth order strain gradient models. The results can provide useful guidance for the study and design of the next generation of nanodevices that make use of the wave propagation properties of single-walled carbon nanotubes.

"About this title" may belong to another edition of this title.

Publisher
Grin Verlag
Publication date
2012
Language
English
ISBN 10 
3656295336
ISBN 13 
9783656295334
Binding
Paperback
Number of pages
36