20.500.12556/RUL-92943 Analiza utrujanja talilnega elementa nizkonapetostne varovalke Fatigue analysis of melting element low voltage fuse Magistrska naloga predstavlja analizo utrujanja talilnega elementa nizkonapetostne varovalke. Predstavljena je uporaba nizkonapetostnih varovalk, fizikalno delovanje, standardi ter pogoji delovanja. Talilni element, kot nosilec vseh obremenitev, smo obremenjevali z enostavnim tokovnim profilom do poškodbe. Na podlagi večjega števila vzorcev smo za tri različne verjetnosti opredelili verjetnost porušitve. Vzporedno smo v programskem okolju izdelali virtualni model. Njegovo verodostojnost smo potrdili s primerjavo povprečnih izmerjenih temperaturnih profilov vzdolž talilnega elementa. Na podlagi zadostnega ujemanja temperaturnega profila je bila izdelana trdnostna analiza. Ob predhodno izdelani stabilizirano ciklični krivulji in zdržljivostni krivulji gradiva talilnega elementa smo, z uporabo napetostnega pristopa za določanje poškodbe, napovedali dobo trajanja. Kljub rezultatom napovedi v področju malo ciklične trdnosti, so le-ti primerljivi z eksperimentalnimi opažanji. Master thesis represents a fatigue analysis of the melting element of low voltage fuses. There is presented the use of low-voltage fuses, physical functioning, standards and operating conditions. The melting element as a carrier of all loads was burdened with a simple current profile until the damage. Based on a large number of samples we have defined for three different probabilities probability of failure. In a parallel programming environment we created a virtual model. Its authenticity was confirmed by comparing the average measured temperature profiles along the melting element. On the base of insufficient matching temperature profile we designed strength analysis. With previous prefabricated stabilized cyclic curve and endurance curve of material that the melting element was made, we determinated the damage with the use of the voltage approaches to predict the lifetime. Despite the results in the area of low cycle fatigue are only those to be comparable with the experimental observations. življenjska doba ciklično utrujanje napetostni pristop talilni element temperaturni profil verjetnost porušitve life span cyclic fatique stress approach melting element temperature profile probability of failure true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2017-07-11 09:20:15 2017-07-11 09:20:17 2023-12-13 08:20:08 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 189583 441.pdf 441.pdf 1 317EECD11CEB15F0091F74BB94C0BE35 f6f9f0e3fcf6ac734f9b867eebbf7fcda04132dde3311aa798685fcb5f50407a 76a61375-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/cfd5abc4-d7cb-4df1-871f-0c3f9c6b28e9 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=101109 Fakulteta za strojništvo 0 0 0