magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo
Miha Pečarič (Author), Martin Česnik (Mentor), Janko Slavič (Mentor)

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.

Keywords

magistrske naloge;identifikacija razpoke;vibracijsko utrujanje;termoelastičnost;hitra kamera;hitra termo kamera;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [M. Pečarič]
UDC: 531.38/.39:620.178.3:539.32(043.2)
COBISS: 219005955 Link will open in a new window
Views: 243
Downloads: 88
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Other data

Secondary language: English
Secondary title: Thermoelasticity-based vibration-fatigue-crack identification
Secondary 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.
Secondary keywords: master thesis;crack identification;vibration fatigue;thermoelasticity;fast camera;fast thermal camera;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. Ljubljana, Fak. za strojništvo
Pages: XXIV, 60 str.
ID: 24798274
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