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Koncept avtomatiziranega generiranja virtualnih polj za identifikacijo materialnih parametrov na osnovi virtualnega dela
ID Ratajec, Vid Tilen (Author), ID Starman, Bojan (Mentor) More about this mentor... This link opens in a new window, ID Halilovič, Miroslav (Comentor)

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Abstract
Pri analizi izdelkov in naprav je pogosto potrebno poznati materialne parametre snovi, ki se jih lahko identificira z uporabo metod inverzne identifikacije. Ena izmed njih je metoda virtualnih polj, s pomočjo katerih lahko izračunamo materialne parametre brez potratnih numeričnih analiz. V magistrskem delu je predstavljen koncept avtomatiziranega snovanja in testiranja virtualnih polj in sicer z uporabo numeričnih simulacij vzorcev v okolju Abaqus. Vrednotenje polj temelji na izračunu zunanjega in notranjega virtualnega dela z uporabo Piola-Kircohhoffovega tenzorja napetosti prvega reda in referenčne konfiguracije vzorca. Predstavljeni so rezultati testiranja vzorcev s temperaturnim obremenjevanjem modela končnih elementov. Za vsak vzorec je bilo izračunano notranje in zunanje delo, glede na razmerje teh del pa je bilo določeno, ali je ustvarjeno virtualno polje primerno za uporabo v izračunu materialnih parametrov. Predstavljen koncept omogoča ustvarjanje in testiranje velikega števila virtualnih polj, izračuni dela pa lahko omogočijo bolj učinkovit pristop k izbiri bolj primernih polj.

Language:Slovenian
Keywords:metoda virtualnih polj, virtualno delo, Abaqus, inverzna identifikacija, numerična analiza, Wolfram Mathematica
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2025
Number of pages:XXII, 53 str.
PID:20.500.12556/RUL-175323 This link opens in a new window
UDC:531.7:681.5:004.94(043.2)
COBISS.SI-ID:255758083 This link opens in a new window
Publication date in RUL:24.10.2025
Views:115
Downloads:12
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Secondary language

Language:English
Title:Concept for automated generation of virtual fields for material parameter identification based on principle of virtual work
Abstract:
When manufacturing, it is necessary to know the parameters of the material, which can be identified using inverse identification—one of these methods is the virtual field method. This method is based on virtual fields, which can be used to calculate material parameters. The master’s thesis presents the concept of automated generation and testing of virtual fields using numerical simulations of different samples in Abaqus. The evaluation of fields is based on the calculation of the external and internal virtual work using the Piola-Kirchhoff first-order stress tensor and the reference configuration of the sample. The results of testing samples with temperature loading of the finite element model are presented. For each sample, the internal and external work was calculated, and based on the ratio of these parts, it was determined whether the created virtual field is suitable for use in the calculation of material parameters. The presented concept enables the creation and testing of a large number of virtual fields, and the work calculations can enable a more efficient approach to selecting more suitable fields.

Keywords:virtual fields method, virtual work, Abaqus, inverse identification, numerical analysis, Wolfram Mathematica

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