20.500.12556/DKUM-78351 Simuliranje duktilnega loma s pomočjo GTN mikromehanskega poškodbenega modela magistrsko delo Simulation of ductile fracture using GTN micromechanical damage model V magistrski nalogi je obravanavano mikromehansko modeliranje duktilnega loma z uporabo Gurson-Tvergaard-Needleman mikromehanskega poškodbenega materialnega modela (GTN), z namenom ugotavljanja primernosti tega modela za numerično določanje lomnomehanskih lastnosti obravnavanega materiala, na podlagi SE(B)-preizkušancev. Zraven mikromehani-zmov duktilnega loma je predstavljen tudi zgodovinski razvoj (v modernejši Kompletni Gurso-nov model - CGM), je hkrati poenostavljeno predstavljena njegova matematična sestava in delovanje. Prikazana je kalibracija CGM, ki je bila izvedena z uporabo parametričnih nume-ričnih simulacij in je temeljila na eksperimentalnih rezultatih standardnih in nestandardnih na-teznih preizkusov. Nazadnje so prikazani še izdelava numeričnega modela obravnavanih SE(B)-preizkušancev (z implementacijo kalibriranega CGM-modela) ter rezultati numerične simulacije, na podlagi katerih je bilo določeno, da model je primeren za numerično določanje lomnomehanskih lastnosti obravnavanega materiala na podlagi SE(B)-preizkušancev The subject of this masters thesis concerns micromechanical modeling of ductile fracture using the Gurson-Tvergaard-Needleman micromechanical material damage model (GTN), with the intent of determining the validity of it's use for numerical determination of fracture-mechanical properties of the studied material, based on SE(B) specimens. Along with the micro-mechanisms of ductile fracture, a brief overview of the historical developement of the GTN mo-del and it's evolution the more modern Complete Gurson model – CGM is presented, through which it's mathematical construction and functioning are shown in a simplified manner. Cali-bration of the CGM model was performed using parametric numerical simulations and was based on exsperimental results of standard and nonstandard tensile specimens. Finally, the construction of the numerical model of the studied SE(B) specimens (with the implementation of the calibrated CGM model) is presented, followed by the results of the numerical simulation. Based on the numerical results, the numerical model demonstrated to be adequate for numeri-cal determination of fracture-mechanical properties of the studied material, based on SE(B) specimens. duktilni lom mikromehansko modeliranje Kompletni Gursonov model CGM Gurson-Tvergaard-Needleman GTN ductile fracture micromechanical modeling Complete Gurson model CGM Gurson-Tvegaard-Needleman GTN true true false [F. Jerenec] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-12-11 13:45:24 2021-01-12 09:51:54 2022-08-09 19:00:14 2021-01-17 03:20:46 2020 0 Maribor 0 Maribor X, 56 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.42:620.17/.18(043.2) 47255555 URN:SI:UM:DK:QSMBII29 MAG_Jerenec_Filip_2021.pdf MAG_Jerenec_Filip_2021.pdf 1 A7B2C2374F4179310AA7F477BB06BCD4 97e6d8cefc6b81b8ac21d887e8d3343c4a98601d96d40fe8f1735d257791789a 11c37be2-7c12-11eb-bb7a-00155d0001ca 20.500.12556/dkum/a87f4af9-e016-4568-93cc-ed084a491e14 https://dk.um.si/Dokument.php?lang=slv&id=148284 Fakulteta za strojništvo 0 0 0