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Uporaba principa termoelastičnosti za oceno vibracijske poškodovanosti izdelkov
ID Dečko, Van (Author), ID Slavič, Janko (Mentor) More about this mentor... This link opens in a new window

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Abstract
V zaključni nalogi je prestavljena potencialna možnost uporabe termografije za identifikacijo poškodovanosti na izbranem vzorcu. V začetku naloge je predstavljen princip termoelastičnosti in nihanja, sledijo numerične simulacije za modalne analize ter praktični eksperimenti s termokamero, kjer smo z njeno pomočjo določili modalne oblike vzorca. Ključen eksperiment je bil identifikacija poškodovanosti na vzorcu oziroma zaznavanje porušitve na izbranem vzorcu. Ugotovili smo, da lahko porušitev vzorca zaznamo kot padec amplitude temperaturnih nihanj na kritičnih mestih vzorca.

Language:Slovenian
Keywords:poškodovanost, termoelastičnost, lastna frekvenca, temperaturno nihanje, termokamera, modalna analiza
Work type:Final paper
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:[V. Dečko]
Year:2023
Number of pages:XI, 32 f.
PID:20.500.12556/RUL-143856 This link opens in a new window
UDC:539.3:620.1:544.3(043.2)
COBISS.SI-ID:140748547 This link opens in a new window
Publication date in RUL:15.01.2023
Views:660
Downloads:94
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Secondary language

Language:English
Title:Thermoelasticity based vibration-fatigue damage estimation
Abstract:
This thesis demonstrates the potential usage of thermography to identify vibration fatigue on dynamically exited samples. At the beging of the thesis, priciples of thermoelasticity and vibrations are presented, following by numerical modal analysis and experimental research with thermal camera where we determined modal shapes of a sample. Main experiment was focused on identification of fatigue on a sample. In the final analysis we found out that fatigue on a sample can be determined by the drop of amplitude of temperature oscillation on most stressed parts of the sample.

Keywords:­fatigue damage, thermoelasticity, natural frequency, temperature oscillation, thermal camera, modal analysis

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