Asymptotic modeling of nonlinear bending and buckling behavior of carbon nanotubes

Ponnusami, SA and Gupta, M and Harursampath, D (2018) Asymptotic modeling of nonlinear bending and buckling behavior of carbon nanotubes. In: AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2018, 8 - 12 January 2018, Kissimmee, Florida.

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Abstract

The present work investigates the nonlinear bending and buckling behavior of Carbon Nano Tubes (CNTs) using Variational Asymptotic Method (VAM). Considering a CNT as a slender beam structure, an asymptotically-correct nonlinear continuum beam model is presented. Through the resulting nonlinear moment-curvature relationship, the model captures the phenomenon of ovalization of the cross-sections and local buckling of the CNT, which arises due to their geometrical nature. Further studies are performed in order to explore the effect of CNT wall thickness on the nonlinear bending behavior of the CNT structure. It is shown that the continuum modeling approach can capture the ovalization and further localization of the CNT under bending. The study aims to provide a reducedorder modeling framework to analyze the inherent nonlinearities and instabilities associated with the geometrical nature of CNTs.

Item Type:	Conference Paper
Publication:	AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2018
Publisher:	American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information:	The copyright for this article belongs to the American Institute of Aeronautics and Astronautics Inc.
Keywords:	Aviation; Bending (forming); Buckling; Continuum mechanics; Dynamics; Structural dynamics, Buckling behaviors; Carbon nano tube (CNTs); Continuum Modeling; Continuum-beam models; Moment-curvature relationship; Non-linear bending; Reduced order models; Variational asymptotic methods, Carbon nanotubes
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	24 Aug 2022 06:25
Last Modified:	24 Aug 2022 06:25
URI:	https://eprints.iisc.ac.in/id/eprint/76095

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