Simultaneous non-contact identification of the elastic modulus, damping and coefficient of thermal expansion in 3D-printed structures

Krivic, Gašper (avtor), Slavič, Janko (avtor)

Thermoplastic-extrusion 3D printing has gained popularity for the fabrication of electrothermal soft actuators that can control shape in response to temperature changes generated by embedded 3D-printed heaters. However, the material properties, such as the coefficient of thermal expansion, elastic modulus, and damping, significantly impact the performance of these 3D-printed electrothermal actuators. The material properties can be temperature-dependent, and vary based on the print and fill orientation. Current experimental methods cannot simultaneously research these properties, resulting in partial research of the influencing parameters. This research introduces a simultaneous and non-contact identification method for the elastic modulus, damping, and coefficient of thermal expansion, utilizing optical and thermal cameras, a scanning laser vibrometer, IR heating, and electrodynamic shaker excitation. The method was applied to several materials, including composites. The introduced method can fully characterize the 3D prints and the materials used for 3D printing, leading to the faster and more predictable development of future 3D-printed electrothermal actuators.

• Jezik: Angleški jezik
• Ključne besede: elastic modulus, coefficient of thermal expansion, damping ratio, glass-transition temperature, 3D printing, electrothermal actuators
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: 14 str.
• Številčenje: Vol. 125, art. 108131
• PID: 20.500.12556/RUL-152118
• UDK: 539.3
• ISSN pri članku: 0142-9418
• DOI: 10.1016/j.polymertesting.2023.108131
• COBISS.SI-ID: 170982915
• Datum objave v RUL: 06.11.2023

Gradivo je del revije

• Naslov: Polymer testing
• Skrajšan naslov: Polym. test.
• Založnik: Elsevier
• ISSN: 0142-9418
• COBISS.SI-ID: 26155008

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: modul elastičnosti, temperaturni razteznostni koeficient, razmernik dušenja, temperatura steklastega prehoda, 3D-tisk, elektrotermični aktuatorji

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0263
• Naslov: Mehanika v tehniki

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: J2-3045
• Naslov: V enem procesu 3D natisnjeni dinamični senzorji