Metoda za sočasno brezkontaktno merjenje modula elastičnosti in temperaturnega razteznostnega koeficienta 3D natisnjenih struktur

Krivic, Gašper (author), Slavič, Janko (mentor)

V zadnjem času se za 3D tisk uveljavljajo alternativni kompozitni materiali, katerih lastnosti so še precej neraziskane. V nalogi je predstavljena brezkontaktna eksperimentalna metoda za sočasno določevanje modula elastičnosti in temperaturnega razteznostnega koeficienta (TRK) 3D natisnjenih struktur. Modul elastičnosti določimo iz lastne frekvence strukture, medtem ko TRK določimo iz meritev temperature s termokamero in meritev deformacij z metodo korelacije digitalnih slik. Uporaba metode je prikazana za identifikacijo ortotropnih materialnih lastnosti PLA in kompozitnega materiala iz PLA z dodatkom lesnih delcev.

• Language: Slovenian
• Keywords: elektrotermični mehki aktuatorji, 3D tisk, ortotropne materialne lastnosti, modul elastičnosti, temperaturni razteznostni koeficient
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [G. Krivic]
• Year: 2022
• Number of pages: XXII, 56 str.
• PID: 20.500.12556/RUL-138945
• UDC: 539.3:539.52:004.9(043.2)
• COBISS.SI-ID: 119299587
• Publication date in RUL: 26.08.2022

KRIVIC, Gašper, 2022, Metoda za sočasno brezkontaktno merjenje modula elastičnosti in temperaturnega razteznostnega koeficienta 3D natisnjenih struktur [online]. Master’s thesis. Ljubljana : G. Krivic. [Accessed 8 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=138945

Secondary language

• Language: English
• Title: An experimental method for simultaneous non-contact identification of elastic modulus and coefficient of thermal expansion in 3D printed materials

Abstract

Recently, alternative composite materials have been promoted for 3D printing, but their properties are still largely unexplored. This thesis presents a non-contact experimental method for the simultaneous determination of elastic modulus and coefficient of thermal expansion (CTE) in 3D printed materials. The elastic modulus is obtained from the natural frequency of the structure, while the CTE is obtained from temperature measurements with a thermal camera and strain measurements with the digital image correlation method. The application of the method is demonstrated for the identification of the orthotropic material properties of PLA and a composite material made of PLA with the addition of wood particles.

• Keywords: soft electrothermal actuators, 3D printing, orthotropic material properties, elastic modulus, coefficient of thermal expansion