Identifikacija vibracijskega utrujanja z uporabo principa termoelastičnosti

Šonc, Jaša (author), Slavič, Janko (mentor)

V magistrski nalogi je raziskan potencial uporabe termoelastičnega principa za analizo vibracijskega utrujanja. Uporaba zakonov termoelastičnosti omogoča eksperimentalno določitev poškodovanosti z veliko prostorsko gostoto. V numeričnem eksperimentu je z metodo končnih elementov simuliran termoelastični odziv strukture na naključno vzbujanje, iz katerega je določena poškodovanost. Rezultat je primerjan s klasično metodo vibracijskega utrujanja, ki uporablja ekvivalentno von Misesovo napetost (EVMS). Izvedena je tudi meritev s termo kamero, s katero so eksperimentalno potrjene predpostavke in rezultati numeričnega eksperimenta.

• Language: Slovenian
• Keywords: termoelastičnost, vibracijsko utrujanje, metoda končnih elementov, modalna analiza, napetostni odziv, modalna dekompozicija, hitra termo kamera
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [J. Šonc]
• Year: 2023
• Number of pages: XXIV, 55 str.
• PID: 20.500.12556/RUL-153330
• UDC: 539.32:620.178.3:519.61(043.2)
• COBISS.SI-ID: 186205187
• Publication date in RUL: 22.12.2023

Secondary language

• Language: English
• Title: Thermoelasticity-based vibration fatigue identification

Abstract

In the master's thesis, the potential of using the thermoelastic principle for the analysis of vibration fatigue is researched. The application of thermoelasticity laws allows for the experimental determination of full field damage with high spatial resolution. In a numerical experiment, the thermoelastic response of the structure to random excitation is simulated using the finite element method, from which damage is determined. The result is compared with the classical method of vibration fatigue using equivalent von Mises stress (EVMS). Additionally, a measurement with a thermal camera is conducted to experimentally confirm the assumptions and results of the numerical experiment.

• Keywords: thermoelasticity, vibration fatigue, finite element method, modal analysis, stress response, modal decomposition, fast thermal camera