20.500.12556/RUL-119362 Računska napoved orientacije vlaken v polimernih kompozitih Numerical prediction of fiber orientation in polymer composites Poznavanje orientacije steklenih vlaken nosi pomembno vlogo pri opisu mehanskega odziva kompozitnih izdelkov. Kljub več desetletjem raziskav še vedno ni univerzalno sprejetega modela, ki bi omogočal natančen popis orientacije vlaken. V tem delu smo izdelali program, ki omogoča izračun orientacije steklenih vlaken. Izračun temelji na modelu Folgar-Tuckerja in je primeren za obravnavo izdelkov preprostih geometrij. S pomočjo več analiz smo prikazali težave nekaterih obstoječih pristopov pri napovedovanju orientacije. Med drugim smo analizirali in prikazali vpliv gostote mreže, različnih faktorjev modelov in začetne orientacije vlaken. Izračune smo validirali s primerjavo rezultatov s komercialnim programom Moldflow. Z rezultati smo prikazali, da so za natančno določitev orientacije vlaken pomembne pravilno predpisane začetne orientacije vlaken, natančno poznavanje hitrostnega polja in pravilno nastavljeni prosti parametri. Knowing the orientation of glass fibers carry an important role in further optimization of composite products. Despite decades of research, there is still no universally developed model that would accurately predict fiber orientation distribution. In this work, we have made a program for determining the orientation of glass fibers. Calculation is based on the Folgar-Tucker model and can be used on simple geometries. With the help of several analyzes, we have shown the difficulties in predicting orientation. We analyzed and showed the influence of mesh density, different model factors and initial orientation of the fibers. The calculations were validated by comparing the results with commercial software Moldflow. The results show that correctly prescribed initial fiber orientations, precise knowledge of the velocity field and accurately set model factors are necessary for accurate determination of fiber orientation. steklena vlakna porazdelitvena funkcija tenzor orientacije modeli za napovedovanje orientacije Folgar-Tucker model simulacija orientacije vlaken glass fibers orientation distribution function orientation tensor fiber orientation models Folgar-Tucker model fiber orientation simulation true false false [G. Urana] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-09-08 08:33:19 2020-09-08 08:33:20 2022-08-31 03:52:44 0000-00-00 00:00:00 2020 0 Ljubljana 0 XXI, 143 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 666.189.21:678:519.6(043.2) 223733 28713987 5825.pdf 5825.pdf 1 8599B0D6133DF51C512E8ABB9AFE7D60 93608d79330efdc525cb27b673cd8c271e9334fddedef37d9842c111a83767bb ce6c6645-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134064 5826.nb 5826.nb 1 E6779B48F516678E06C8BD54803B8A8B 411936253b19071ad32c1c409ded293bb91803b0ee600a3bf1f40eba119d14f1 ce7aaec5-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134065 5828.nb 5828.nb 1 36745ED30C022873394D6A56EA4ADBCB 35b53f12bfe620ef6b1d7ee5299b55f7abace87a4b2776826caf0523f87f722c ce9e7241-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134067 5827.nb 5827.nb 1 284D246FD3EC4E7BFC4FFDCB49AE6241 78cfa9952993671293e54ec5787cfeb7c8f807ba32a8ecbe3de6818f7d4f0ff5 ce8dc2df-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134066 5829.nb 5829.nb 1 30A9715DC889032B8863D2DF8B9C4CCD 30365ed7504c30e7f708bf8616d855fb75ec3593cd3ea7cac354c78ab241db6e ceacc74b-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134068 Fakulteta za strojništvo 0 0 0