Self-aware active metamaterial cell 3D-printed in a single process

Košir, Tilen (author), Zupan, Marko (author), Slavič, Janko (author)

Metamaterials are capable of attenuating undesired mechanical vibrations within a narrow band-gap frequency range; however, real-world applications often require adjustments due to varying loads and frequency content. This study introduces a self-aware, thermo-active metamaterial, 3D-printed in a single process using thermoplastic material extrusion. The adjustment of the natural frequency and band-gap region is achieved through resistive heating of conductive paths, which alters the stiffness of the base cell’s resonator. Additionally, these conductive paths facilitate the detection of the resonator’s excitation frequency and temperature, thereby eliminating the need for external sensors. This dynamic adaptability, experimentally demonstrated by achieving a band-gap tuning range from 505 Hz to 445 Hz with a 17 °C temperature difference, highlights the potential of these metamaterials for applications in smart structures across the aerospace, civil, and automotive industries.

• Language: English
• Keywords: metamaterials, 3D printing, thermoactivity, single process, piezoresistivity, material extrusion
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 12 str.
• Numbering: Vol. 282, art. 109591
• PID: 20.500.12556/RUL-159994
• UDC: 004.92:537.8
• ISSN on article: 1879-2162
• DOI: 10.1016/j.ijmecsci.2024.109591
• COBISS.SI-ID: 203591427
• Publication date in RUL: 05.08.2024

Record is a part of a journal

• Title: International journal of mechanical sciences
• Publisher: Elsevier
• ISSN: 1879-2162
• COBISS.SI-ID: 23008517

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: metamateriali, 3D tisk, termoaktivnost, en proces, piezoupornost, termoplastična materialna ekstruzija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0263
• Name: Mehanika v tehniki

• Funder: ARRS - Slovenian Research Agency
• Project number: J2-3045
• Name: V enem procesu 3D natisnjeni dinamični senzorji