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Title:Simuliranje duktilnega loma s pomočjo GTN mikromehanskega poškodbenega modela : magistrsko delo
Authors:ID Jerenec, Filip (Author)
ID Gubeljak, Nenad (Mentor) More about this mentor... New window
ID Štefane, Primož (Comentor)
Files:.pdf MAG_Jerenec_Filip_2021.pdf (4,74 MB)
MD5: A7B2C2374F4179310AA7F477BB06BCD4
PID: 20.500.12556/dkum/a87f4af9-e016-4568-93cc-ed084a491e14
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract: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
Keywords:duktilni lom, mikromehansko modeliranje, Kompletni Gursonov model, CGM, Gurson-Tvergaard-Needleman, GTN
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[F. Jerenec]
Year of publishing:2020
Number of pages:X, 56 f.
PID:20.500.12556/DKUM-78351 New window
UDC:539.42:620.17/.18(043.2)
COBISS.SI-ID:47255555 New window
NUK URN:URN:SI:UM:DK:QSMBII29
Publication date in DKUM:12.01.2021
Views:877
Downloads:154
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
:
JERENEC, Filip, 2020, Simuliranje duktilnega loma s pomočjo GTN mikromehanskega poškodbenega modela : magistrsko delo [online]. Master’s thesis. Maribor : F. Jerenec. [Accessed 13 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=78351
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Licences

License:CC BY-NC-SA 4.0, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International
Link:http://creativecommons.org/licenses/by-nc-sa/4.0/
Description:A Creative Commons license that bans commercial use and requires the user to release any modified works under this license.
Licensing start date:11.12.2020

Secondary language

Language:English
Title:Simulation of ductile fracture using GTN micromechanical damage model
Abstract: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.
Keywords:ductile fracture, micromechanical modeling, Complete Gurson model, CGM, Gurson-Tvegaard-Needleman, GTN


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