Propagation of elastic waves in nanostructures

S. Gopalakrishnan

doi:10.1117/12.2218203

16 April 2016 Propagation of elastic waves in nanostructures

S. Gopalakrishnan

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Proceedings Volume 9802, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2016; 98020N (2016) https://doi.org/10.1117/12.2218203
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

This paper presents the study of propagation of elastic waves in nanostructures using continuum approximation. The wave propagation characteristics in both 1-D and 2-D nanostructures, namely the carbon nanotubes and Graphene are studied in this paper. In particular, the use of various gradient elasticity theories, namely the Eringen’s Stress gradient theory, the second and fourth order strain gradient theories, that brings in atomistic length scale parameters into the continuum governing equations, is used in this paper to study the wave propagation characteristics in the nanostructures. Using these non-local theories, wave propagation in Single and Multi-wall carbon tubes and monolayer Graphene structures are studied. A number of examples are presented that brings out the essential wave propagation features such as escape frequency, cut-off frequencies, phase speeds and group speeds in these structures.

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S. Gopalakrishnan "Propagation of elastic waves in nanostructures", Proc. SPIE 9802, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2016, 98020N (16 April 2016); https://doi.org/10.1117/12.2218203

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