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Title:Mehanska karakterizacija lotnih spojev toplotnega izmenjevalca : magistrsko delo
Authors:ID Kralj, Jernej (Author)
ID Glodež, Srečko (Mentor) More about this mentor... New window
ID Nečemer, Branko (Comentor)
Files:.pdf MAG_Kralj_Jernej_2023.pdf (3,07 MB)
MD5: 85B9EEA9B2CB497022A446C4C3B539B4
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:V tem delu smo določili vrednosti materialnih parametrov lotnih spojev toplotnega izmenjevalca, ki so namenjeni definiranju materialnih lastnosti pri numeričnih simulacijah z metodo končnih elementov. Na podlagi rezultatov statičnih nateznih testov smo določili vrednost modula elastičnosti, meje tečenja in natezne trdnosti preizkušancev lotnih spojev, prav tako pa smo podali tudi nekaj parametrov, ki opišejo plastični del krivulje σ – ε. Poleg statičnih smo izvajali tudi dinamične teste pri vedno enakem obremenitvenem razmerju in s pomočjo le – teh določili vrednosti koeficienta in eksponenta trdnosti pri utrujanju, ki sta veljavna v območju, ko delovne napetosti ne presegajo vrednosti meje tečenja. Vse pridobljene rezultate smo naknadno tudi potrdili z uporabo numeričnih analiz po metodi končnih elementov v programu Ansys, kjer smo pokazali, da se rezultati ujemajo.
Keywords:toplotni izmenjevalec, lotni spoj, utrujanje, eksperimentalne raziskave, numerične analize.
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[J. Kralj]
Year of publishing:2023
Number of pages:1 spletni vir (1 datoteka PDF (XIV, 65 f.))
PID:20.500.12556/DKUM-84734 New window
UDC:620.17:621.791.3.052(043.2)
COBISS.SI-ID:167946243 New window
Publication date in DKUM:24.08.2023
Views:820
Downloads:5
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:16.07.2023

Secondary language

Language:English
Title:Mechanical characterisation of brazed joints of a heat exchanger
Abstract:In this work we defined static and fatigue material parametres of a brazed joint of a heat exchanger for purposes of FEA simulations. Based on experimental results of static tesnile testing we determinated values of Young modulus, yield strength, ultimate tesnile strength and values for evaluating plasticity. In case of fatigue, the dynamic tests with the equal loading ratio were performed on brazed joint speciments. Based on results of dynamic testing we determinated fatigue coefficient and exponent for loading cases where values of an applying stress do not exceed yield strength. All the reuslts were validated with numerical FEA simulations performed in Ansys software.
Keywords:heat exchangers, brazed joint, fatigue, experimental studies, numerical analysis.


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