20.500.12556/RUL-153368 Metode za neporušno testiranje in vrednotenje intenzitete obrabe rabljenih plezalnih vrvi Methods for non-destructive testing and evaluation of wear intensity of used climbing ropes V zadnjem desetletju je športno plezanje postalo izjemno priljubljeno, kar je privedlo do večjega povpraševanja po zanesljivih plezalnih vrveh z daljšo življenjsko dobo. Običajno se obraba plezalnih vrvi ocenjuje z vizualnim pregledom in s subjektivno presojo plezalcev, kar ni vedno zanesljivo in lahko predstavlja tveganje. Z željo po zagotavljanju zanesljivejše ocene smo v magistrskem delu razvili tri neporušne metode testiranja. Metode vključujejo merjenje modula elastičnosti, frekvence nihanja vrvi pri izbrani sili napetja in pri izbranem raztezku napetja. Na koncu smo vrv na merjenih odsekih še pretrgali, da smo pridobili podatke o realni nosilnosti, ki smo jih uporabili za primerjavo z neporušnimi metodami. Rezultati merjenja modula elastičnosti so po obliki grafa najbolj podobni rezultatom porušnih testov. Meritve frekvenc so zaradi mehanskih lastnosti vrvi precej kompleksnejše, kot smo si na začetku predstavljali, in tudi rezultati so temu primerni. In the last decade, sport climbing has become extremely popular, which has led to a greater demand for reliable climbing ropes with a longer lifespan. Usually, the wear of climbing ropes is assessed by visual inspection and subjective judgment of climbers, which is not always reliable and can pose a risk. With the desire to provide a more reliable assessment, we developed three non-destructive testing methods in our master's thesis. The methods include measuring the modulus of elasticity, the frequency of oscillation of the rope at the selected tension force and at the selected tension elongation. At the end, we broke the rope on the measured sections in order to obtain data on the real load capacity, which we used for comparison with non-destructive methods. The results of measuring the modulus of elasticity are the most similar to the results of destructive tests in terms of the shape of the graph. Due to the mechanical properties of the rope, the frequency measurements are much more complex than we initially imagined, and the results are suitable for this. plezalna vrv neporušno testiranje intenziteta obrabe modul elastičnosti frekvenca nihanja parameter obrabljenosti climbing rope non-destructive testing wear intensity modulus of elasticity oscillation frequency wear parameter true false false [D. Peterlin] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-12-23 08:30:43 2023-12-23 08:30:50 2024-02-19 13:28:12 0000-00-00 00:00:00 2023 0 Ljubljana 0 XX, 66 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.193.95:679.7:539.32(043.2) 259906 186003715 32643.pdf 32643.pdf 1 B30D8566C3E1303A8726179035D04DDA 24cc73a0683ac60acb24ab2b6f5bdbe4a63978ea5d43cf2d846f23ffd859bbf2 3272233e-a165-11ee-ba59-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=179305 Fakulteta za strojništvo 0 0 0