3D-printed programmable mechanical metamaterials for vibration isolation and buckling control

Zolfagharian, A., Bodaghi, M. ORCID: 0000-0002-0707-944X, Hamzehei, R., Parr, L., Fard, M. and Rolfe, B.F., 2022. 3D-printed programmable mechanical metamaterials for vibration isolation and buckling control. Sustainability, 14 (11): 6831.

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Vibration isolation performance at low-frequency ranges before resonance is a vital characteristic that conventional springs cannot exhibit. This paper introduces a novel zero Poisson’s ratio graded cylindrical metamaterial to fulfill two main goals: (1) vibration isolation performance in low-frequency bands prior to resonance and (2) global buckling control of a long cylindrical tube. For this purpose, “soft and stiff” re-entrant unit cells with varying stiffness were developed. The cylindrical metamaterials were then fabricated using a multi-jet fusion HP three-dimensional (3D) printer. The finite element analyses (FEA) and experimental results demonstrate that the simultaneous existence of multi-stiffness unit cells leads to quasi-zero stiffness (QZS) regions in the force-displacement relationship of a cylindrical metamaterial under compression. They possess significant vibration isolation performance at frequency ranges between 10 and 30 Hz. The proposed multi-stiffness re-entrant unit cells also offer global buckling control of long cylindrical tubes (with a length to diameter ratio of 3.7). The simultaneous existence of multi-stiffness re-entrant unit cells provides a feature for designers to adjust and control the deformation patterns and unit cells’ densification throughout cylindrical tubes.

Item Type: Journal article
Publication Title: Sustainability
Creators: Zolfagharian, A., Bodaghi, M., Hamzehei, R., Parr, L., Fard, M. and Rolfe, B.F.
Publisher: MDPI AG
Date: 2 June 2022
Volume: 14
Number: 11
Rights: Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 07 Jun 2022 09:47
Last Modified: 07 Jun 2022 09:47
URI: https://irep.ntu.ac.uk/id/eprint/46410

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