3D-Printed Programmable Mechanical Metamaterials for Vibration Isolation and Buckling Control

Ali Zolfagharian, Mahdi Bodaghi, Ramin Hamzehei, Liam Parr, Mohammad Fard and Bernard F. Rolfe
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Ali Zolfagharian: School of Engineering, Deakin University, Geelong, VIC 3216, Australia
Mahdi Bodaghi: Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
Ramin Hamzehei: Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
Liam Parr: School of Engineering, Deakin University, Geelong, VIC 3216, Australia
Mohammad Fard: School of Engineering, Royal Melbourne Institute of Technology, Melbourne, VIC 3000, Australia
Bernard F. Rolfe: School of Engineering, Deakin University, Geelong, VIC 3216, Australia

Sustainability, 2022, vol. 14, issue 11, 1-17

Abstract: 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.

Keywords: vibration isolation; low frequencies; metamaterials; multi-stiffness unit cells; global buckling; 3D printing (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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