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Karakterizacija nelinearno-elastičnih materialov na osnovi upogibnih testov
ID Obid, Štefan (Author), ID Halilovič, Miroslav (Mentor) More about this mentor... This link opens in a new window

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Abstract
Gume, razni polimeri in kompoziti izkazujejo nelinearno-elastične (hiperelastične) lastnosti. Določitev njihovih snovnih lastnosti za potrebe računske obravnave snovi je običajno izvedeno iz enoosnih testov, ki podajajo enoosni odziv materiala v nategu. Pomembno vlogo na razporeditev splošnega napetostnega stanja pa ima tudi odziv snovi v tlaku, ki pa običajno niti ni merjen zaradi kompleksnejše izvedbe tlačnih testov. V okviru magistrskega dela je predlagan alternativni način določitve elastičnosti snovi v tlaku na podlagi upogibnega preizkusa. Predlagan postopek je konceptualno in računsko ustrezno prikazan in obrazložen. Izdelano je bilo namensko preizkuševališče za izvajanje upogibnih preizkusov. S pomočjo izdelanega programa so na podlagi izvedenih meritev z inverzno identifikacijo bile določene lastnosti različnih hiperelastičnih konstitutivnih modelov tako v nategu kot v tlaku.

Language:Slovenian
Keywords:nelinearno-elastični materiali, karakterizacija materialnega odziva, materialni parametri, upogibni preizkusi, inverzna identifikacija
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:[Š. Obid]
Year:2019
Number of pages:XXI, 56 str.
PID:20.500.12556/RUL-109273 This link opens in a new window
UDC:620.174(043.2)
COBISS.SI-ID:16864283 This link opens in a new window
Publication date in RUL:29.08.2019
Views:1418
Downloads:224
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Secondary language

Language:English
Title:Characterization of non-linear elastic materials by using bending tests
Abstract:
Rubbers, various polymers and composites exhibit nonlinear-elastic (hyperelastic) properties. The determination of their material properties for the purpose of computational treatment of a substance is usually derived from uniaxial tests that provide a uniaxial response of a material in tension. An important role in the distribution of the general stress state is also played by the material response in compression, which is usually not measured due to complexity of compression tests. In the course of the master's thesis, an alternative method of determining the elasticity of material in compression based on bending tests is proposed. The proposed process is presented conceptually and computationally. An experimental setup for a bending test has been designed. With the developed program, the properties of different hyperelastic constitutive models, both in tension and compression, were determined with inverse identification on the basis of the measurements performed.

Keywords:non-linear elastic materials, materials response characterizations, material parameters, bend tests, inverse identifications

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