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Identifikacija razpoke pri vibracijskem utrujanju na podlagi termoelastičnosti
ID Pečarič, Miha (Author), ID Česnik, Martin (Mentor) More about this mentor... This link opens in a new window, ID Slavič, Janko (Comentor)

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Abstract
V magistrski nalogi je obravnavana identifikacija razpoke na 3D natisnjenem preizkušancu iz polimernega materiala pri vibracijskem utrujanju na 3 načine: spremljanje padca lastne frekvence, identifikacija rasti razpoke s snemanjem s hitro kamero in metodami optičnega toka ter identifikacija razpok na podlagi termoelastičnih pojavov, kar predstavlja glavni cilj naloge. Za potrebe testiranja se je zasnovalo in natisnilo ustrezne preizkušance, na katerih se je določevalo nastajanje in rast razpoke. Vzorce se je utrujalo na stresalniku, poškodba pa se je spremljala z laserskim vibrometrom, hitro kamero ter hitro termo kamero. Ugotovilo se je, da se lahko določi rast razpoke z analizo močnostnega spektra temperature.

Language:Slovenian
Keywords:identifikacija razpoke, vibracijsko utrujanje, termoelastičnost, hitra kamera, hitra termo kamera
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2024
Number of pages:XXIV, 60 str.
PID:20.500.12556/RUL-160198 This link opens in a new window
UDC:531.38/.39:620.178.3:539.32(043.2)
COBISS.SI-ID:219005955 This link opens in a new window
Publication date in RUL:23.08.2024
Views:428
Downloads:117
Metadata:XML DC-XML DC-RDF
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PEČARIČ, Miha, 2024, Identifikacija razpoke pri vibracijskem utrujanju na podlagi termoelastičnosti [online]. Master’s thesis. [Accessed 17 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=160198
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Secondary language

Language:English
Title:Thermoelasticity-based vibration-fatigue-crack identification
Abstract:
In the master's thesis, the identification of a crack in a 3D-printed specimen, made from polymer material, under vibration fatigue is addressed in three ways: monitoring the decrease in natural frequency, identifying crack growth through high-speed camera recording and optical flow methods, and identifying cracks based on thermoelastic phenomena, which represents the main objective of the thesis. For the purpose of testing, appropriate specimen had been designed and printed, on which the formation and growth of the crack were determined. The specimen was fatigued on a shaker, and the damage was monitored with a laser vibrometer, a high-speed camera, and a high-speed thermal camera. It was found that crack growth can be determined by analyzing the power spectrum of temperature.

Keywords:crack identification, vibration fatigue, thermoelasticity, fast camera, fast thermal camera

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