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Additive Manufacturing of Composite Foam Metamaterial Springs for Vibration Isolation

journal contribution
posted on 2023-09-25, 03:33 authored by Ali ZolfagharianAli Zolfagharian, P Picken, M Bodaghi, M Fard, Bernard RolfeBernard Rolfe
This research introduces a novel approach for reducing the vibrations experienced by passengers in vehicles using metamaterials embedded in polyurethane foam to improve the existing vibration isolation capacity of car seats. An exploration of quasizero and negative stiffness metamaterials is conducted to develop metamaterial springs that exhibit a region of high‐static and low‐dynamic stiffness to achieve vibration isolation. Metamaterials are developed using low‐cost open‐source additive manufacturing methods and thermoplastic polyurethane filament. This investigation follows a process of determining the geometric, material, and systemic design requirements, to identify the quasizero and negative‐stiffness force–displacement regions. Small‐scale models of a car seat are developed by embedding the designed metamaterials into different grades of polyurethane foam and completing static and dynamic testing. The results demonstrate practical applications for implementing metamaterial springs into polyurethane foam to enhance vibration isolation under dynamic loading. The developed material library and the key geometric variables in the metamaterial design allow for application‐specific solutions where the selection of the appropriate metamaterial and foam combination can be tailored to suit the system requirements.

History

Journal

Advanced Engineering Materials

Article number

2300356

Pagination

1-25

Location

London, Eng.

ISSN

1438-1656

eISSN

1527-2648

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Publisher

Wiley

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