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Title:Comparison and implementation of thermo-mechanical fatigue damage models : magistrsko delo
Authors:ID Vinkovič, Jure (Author)
ID Glodež, Srečko (Mentor) More about this mentor... New window
ID Šori, Marko (Comentor)
Files:.pdf MAG_Vinkovic_Jure_2021.pdf (4,06 MB)
MD5: 689A7E40334658474408239C804383A2
PID: 20.500.12556/dkum/7353cad6-c720-4671-b5d4-714caf26de67
 
Language:English
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:The basis of the master thesis is an in-depth and comprehensive analysis of the scientific literature on damage models of thermo-mechanical fatigue. The aim of the thesis is to investigate and determine the suitability of damage models for their application in numerical simulations of components subjected to thermo-mechanical loading with in-phase, out-of-phase or constant temperature cycles. The theoretical background of material behavior under static and dynamic loads (e.g. low-cycle fatigue, high-cycle fatigue) is presented. The work also includes an overview of damage mechanisms typical of time-temperature varying loading conditions (e.g. cyclic softening and hardening of the material, mean stress relaxation, material creep, visco-plasticity, etc.). This is followed by a structured review of several damage models of thermo-mechanical fatigue (e.g. Neu-Sehitoglu, DTMF, Coffin-Manson, Ostergren, Smith-Watson-Topper, Unified Energy Approach, etc.). An overview of the experimental tests on aluminum alloy and cast iron carried out at temperatures up to 800 °C is given. The idea of processing the raw experimental data including the calibration procedure of the thermo-mechanical fatigue damage models is schematically illustrated and described. The basic mathematical laws of constitutive material models for both material types are given. In the conclusion of the MSc thesis, the correlations of the calibrated damage models are presented, which, together with the constructive opinions, give an important message on the application of the individual damage models depending on the type of material and the loading method.
Keywords:thermo-mechanical fatigue, constitutive material model, damage model, aluminum alloy, cast iron alloy, finite element method
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[J. Vinkovič]
Year of publishing:2021
Number of pages:XII, 66 str.
PID:20.500.12556/DKUM-80996 New window
UDC:620.178.3(043.2)
COBISS.SI-ID:105429507 New window
Publication date in DKUM:03.01.2022
Views:1038
Downloads:7
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
:
VINKOVIČ, Jure, 2021, Comparison and implementation of thermo-mechanical fatigue damage models : magistrsko delo [online]. Master’s thesis. Maribor : J. Vinkovič. [Accessed 26 March 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=80996
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:03.12.2021

Secondary language

Language:Slovenian
Title:Primerjava in implementacija poškodbenih modelov termo-mehanskega utrujanja
Abstract:Temelj magistrskega dela je poglobljena in izčrpna analiza znanstvene literature s področja poškodbenih modelov termo-mehanskega utrujanja. Namen dela je raziskati in ugotoviti primernost poškodbenih modelov, za aplikacije le-teh, v numeričnih simulacijah komponent, ki so izpostavljene termo-mehanskemu obremenjevanju s cikli v fazi, cikli iz faze ali konstantni temperaturi. Predstavljeno je teoretično ozadje obnašanja materiala pri statičnih in dinamičnih obremenitvah (npr. malo-ciklično utrujanje, veliko-ciklično utrujanje). Delo prav tako zajema pregled poškodbenih mehanizmov, ki so tipični za časovno-temperaturno se spreminjajoče obremenitvene pogoje (npr. ciklično mehčanje in utrjevanje materiala, sprostitev vpliva srednje napetosti, lezenje materiala, visko-plastičnost,…). Sledi strukturiran pregled več poškodbenih modelov termo-mehanskega utrujanja (npr. Neu-Sehitoglu, DTMF, Coffin-Manson, Ostergren, Smith-Watson-Topper, Unified Energy Approach,…). Podan je pregled eksperimentalnih testov aluminijeve zlitine in litega železa, ki so bili izvedeni pri temperaturah do 800 °C. Shematsko je prikazana in opisana ideja obdelave surovih eksperimentalnih podatkov vključno s postopkom kalibracije poškodbenih modelov termo-mehanskega utrujanja. Podane so osnovne matematične zakonitosti konstitutivnih materialnih modelov za obe vrsti materiala. V zaključku magistrskega dela so predstavljene korelacije kalibriranih poškodbenih modelov, ki skupaj s konstruktivnimi mnenji, podajo pomembno sporočilo o aplikaciji posameznih poškodbenih modelov v odvisnosti od vrste materiala in načina obremenjevanja.
Keywords:termo-mehansko utrujanje, konstitutivni materialni model, poškodbeni model, aluminijeve zlitine, lito železo, metoda končnih elementov


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