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Vpliv perturbacij na stabilnost tankostenske valjaste lupine
ID Janev, Blaž (Author), ID Brojan, Miha (Mentor) More about this mentor... This link opens in a new window

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Abstract
Cilindrične lupine, ki so izpostavljene aksialni tlačni obremenitvi, lahko glede na svojo maso prenesejo visoko obremenitev, ob dosegu kritične obremenitve pa se uklonijo. Sila, pri kateri pride do uklona, je v veliki meri odvisna od nepravilnosti in poškodb na plašču cilindra. V magistrskem delu smo najprej opravili raziskavo stabilnosti valjastih lupin. Nato smo opravili numerično simulacijo z metodo končnih elementov v programskem paketu Abaqus 6.13-1 in rezultate preverili z analitičnimi enačbami iz literature. V zadnjem delu naloge pa je opravljen niz eksperimetov, kjer aksialno tlačno obremenjujemo vzorce enakih dimenzij kot v simulacijah. Ugotovili smo, da z nelinearno numerično analizo zelo dobro predvidimo stanje pri realnih preizkusih.

Language:Slovenian
Keywords:stabilnost, uklon, lupine, cilindri, tlačne napetosti
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2024
Number of pages:XX, 58 str.
PID:20.500.12556/RUL-160144 This link opens in a new window
UDC:624.074.433:52-17:53.092(043.2)
COBISS.SI-ID:218521859 This link opens in a new window
Publication date in RUL:22.08.2024
Views:205
Downloads:97
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Secondary language

Language:English
Title:Effect of perturbations on the stability of thin-walled cylindrical shells
Abstract:
Cylindrical shells subjected to an axial compressive load can withstand a high load in relation to their mass, but buckle when the critical load is reached. The force at which deflection occurs depends largely on imperfections and damage to the cylinder liner. In this thesis, we first analysed the stability of cylindrical shells. We then simulated these imperfections numerically using the finite element method in the software package Abaqus 6.13-1. The results were checked with analytical equations from the literature. In the last part, a series of experiments were performed in which, samples with the same dimensions as in the simulations were loaded with axial pressure. We found that the non-linear numerical analysis predicts the situation in real tests very well.

Keywords:stability, buckling, shells, cylinders, compression stresses

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