Mechanical response of a novel hybrid tube composed of an auxetic outer layer

Logakannan, K. P., Rengaswamy, J., Kumar, S. , Ramachandran, V. and Ruan, D. (2022) Mechanical response of a novel hybrid tube composed of an auxetic outer layer. Thin-Walled Structures, 171, 108649. (doi: 10.1016/j.tws.2021.108649)

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In this study, the deformation and energy absorption characteristics of a novel hybrid tube is investigated both experimentally and numerically. The architecture of the proposed hybrid tube composed of an inner conventional tube and a co-axially arranged outer auxetic tube. Quasi-static compressive tests were conducted on the auxetic tubes, the conventional tubes and the hybrid tubes. A three-dimensional digital image correlation technique was used to monitor the evolution of radial contraction of the tubes. Measured performance of the tubes were compared in terms of force, energy absorption, and specific energy absorption. Finite element (FE) models were also developed for the three types of tubes, analyzed using ANSYS/LS-DYNA, and validated by experimental measurements. Both experimental and numerical results showed that the presence of the auxetic tube in the hybrid tube alters the deformation mode of the conventional tube by exerting a radial force. Parametric studies were performed to investigate the effects of the outer auxetic tube, wall thickness of the inner conventional tube, the failure strain, and yield strength of the outer tube’s material on mechanical performance of the hybrid tube. Increasing the yield strength of the outer auxetic tube improved both the energy absorption and specific energy absorption characteristics of the hybrid tube significantly.

Item Type:Articles
Additional Information:The authors would like to acknowledge and appreciate the financial supports from Ministry of Education (MoE) , India through SPARC scheme (SPARC/2018-2019/P988/SL).
Glasgow Author(s) Enlighten ID:Kumar, Professor Shanmugam
Creator Roles:
Kumar, S.Writing – review and editing
Authors: Logakannan, K. P., Rengaswamy, J., Kumar, S., Ramachandran, V., and Ruan, D.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Thin-Walled Structures
ISSN (Online):1879-3223
Published Online:28 November 2021
Copyright Holders:Copyright © 2021 Elsevier Ltd.
First Published:First published in Thin-Walled Structures 171:108649
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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