20.500.12556/RUL-124298 Improved prediction of low-cycle fatigue life for high-pressure die-cast aluminium alloy AlSi9Cu3 with significant porosity The fatigue life of a high-pressure die-cast alloy, AlSi9Cu3, with significant porosity is investigated. Standard specimens were cyclically loaded (R =-1) until fatigue rupture occurred. The specimens were [micro]-CT scanned to obtain a 3D representation of the pores. Models were used to computationally predict the fatigue life using two different methods. First, the fatigue life was predicted using a notch-strain approach combined with a Coffin- Manson durability relationship for homogeneous material. Second, the fatigue life was predicted using an homogenised un-notched model that was combined with an adapted Coffin-Manson relationship which consid-ered a fatigue life reduction due to different pore effects. Raziskava zajema analizo dobe trajanja zlitine AlSi9Cu3 s prisotno visoko stopnjo poroznosti. Preizkušanci standardnih oblik so bili ciklično obremenjeni (R = -1), do nastalega utrujenostnega loma. Vzorci so bili ob tem [mikro]-CT skenirani, da smo določili 3D geometrijo por. Modeli so bili nato uporabljeni pri izračunu dobe trajanja po dveh različnih metodah. Prvič, dobo trajanja smo napovedali po pristopu z zareznim učinkom v kombinaciji s Coffin-Manson razmerjem za homogeni material. Drugič, dobo trajanja smo napovedali ob uporabi homogenega idealiziranega modela, v kombinaciji s prilagojenim nivojem Coffin-Manson krivulje, ki upošteva znižanje dobe trajanja zaradi različnih učinkov por. low-cycle fatigue alloy AlSi9Cu3 porosity notch-strain approach finite element removal malo-ciklično utrujanje zlitina AlSi9Cu3 poroznost pristop z zareznim učinkom odstranitev končnega elementa true false true Angleški jezik Slovenski jezik Članek v reviji 2021-01-14 12:10:28 2021-01-14 12:10:32 2026-04-16 13:50:45 0000-00-00 00:00:00 2021 0 0 Str. 1-12 Vol. 144 Mar. 2021 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2023-01-14 519.876.5:620.178.3(045) 0142-1123 10.1016/j.ijfatigue.2020.106061 46594307 25643520 RAZ_Tomazincic_Dejan_2021.pdf RAZ_Tomazincic_Dejan_2021.pdf 1 AFC2DAE4979D3D933E8F891C146F8454 fb9100e4d1ef29ad6189c3f959ae2c0e6e3e7d07609b30532964accd47e5ab5a 86178347-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139719 https://www.sciencedirect.com/science/article/pii/S0142112320305934?via%3Dihub 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139718 Fakulteta za strojništvo 0 0 0