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Title:Inverzna numerična določitev parametrov Johnson-Cook konstitutivnega modela jekla z uporabo SHPB preizkuševališča
Authors:ID Mauko, Anja (Author)
ID Ren, Zoran (Mentor) More about this mentor... New window
ID Borovinšek, Matej (Comentor)
Files:.pdf MAG_Mauko_Anja_2018.pdf (3,23 MB)
MD5: CBFDA3A59AF69621B9C642968BDBADC2
PID: 20.500.12556/dkum/2d41c793-ae83-4b3d-810d-93923a8b87c9
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Johnson-Cook konstitutivni model omogoča modeliranje vplivov dinamične obremenitve na obnašanje materiala v okviru računalniških simulacij. Osnovni parametri Johnson-Cook modela za jeklo S235 JR so bili določeni z uporabo inverzne numerične metode. Za validacijo numeričnih rezultatov so bili uporabljeni eksperimentalni rezultati, izmerjeni pri dveh različnih deformacijskih hitrostih na SHPB preizkuševališču. Optimizirane vrednosti parametrov Johnson-Cook modela jekla S235 JR so znašale: A=710 MPa, B=30 MPa, n=0,7 [-] ter C=0,01 [-]. Dobljene vrednosti so sprejemljive, saj je bilo odstopanje numeričnih in eksperimentalnih rezultatov v povprečju 11%.
Keywords:SHPB preizkuševališče, Johnson-Cook konstitutivni model, inverzna določitev, Nelder-Mead optimizacija, računalniške simulacije
Place of publishing:Maribor
Publisher:[A. Mauko]
Year of publishing:2018
PID:20.500.12556/DKUM-71458 New window
UDC:[519.6:620.178.3]+004.94(043.2)
COBISS.SI-ID:22184470 New window
NUK URN:URN:SI:UM:DK:WHON30CH
Publication date in DKUM:12.09.2018
Views:1787
Downloads:357
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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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:15.08.2018

Secondary language

Language:English
Title:Inverse computational determination of Johnson-Cook constitutive model parameters for steel by using SHPB test apparatus
Abstract:The Johnson-Cook constitutive model is used to simulate the effects of a dynamic load on the behavior of material within computer simulations. The basic parameters of the Johnson-Cook model for steel S235 JR were determined using inverse numerical method. For the validation of numerical results, experimental results, obtained at two different deformation rates at the SHPB test, were used. The optimized values of JC parameters for steel S235 JR were: A = 710 MPa, B = 30 MPa, n = 0.7 [-] and C = 0.01 [-]. Since the deviation between the numerical and experimental results was approximately 11%, the obtained values of JC parameters are acceptable.
Keywords:SHPB test apparatus, Johnson-Cook constitutive model, inverse determination, Nelder-Mead optimization, computer simulations


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