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Zasnova preizkuševališča za dvoosno preizkušanje pločevine
ID Križnar, Pavel (Author), ID Halilovič, Miroslav (Mentor) More about this mentor... This link opens in a new window

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Abstract
Za uporabo kriterija plastičnega tečenja YLD2000-2d za popis anizotropnega obnašanja pločevine iz nerjavnega jekla AISI 304 je potrebno konstruirati preizkuševališče za dvoosno preizkušanje pločevine. V nalogi je zasnovan in izveden hidravlični preizkus dvoosnega obremenjevanja pločevine preko namenskega postrojenja. Preko meritev tlaka in deformacije pločevine je določen biaksialni Lankfordov koeficient in krivulja plastičnosti. Za določitev glavnih konstrukcijskih parametrov je bila izvedena analiza po metodi končnih elementov. Merilni postopek in izračun napetosti se zanaša na standard ISO 16808. Meritve so pokazale, da material AISI 304 v dvoosnem napetostnem stanju izkazuje anizotropne lastnosti. Vrednost Lankfordovega koeficienta dvoosne anizotropije znaša 1,089, faktor normirane dvoosne napetosti tečenja pa je 0,935.

Language:Slovenian
Keywords:anizotropija, dvoosno napetostno stanje, zasnova preizkuševališča, metoda končnih elementov, plastičnost, materialne lastnosti, Lankfordovi koeficienti
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:[P. Križnar]
Year:2020
Number of pages:XXII, 69 str., [2] f. pril.
PID:20.500.12556/RUL-119352 This link opens in a new window
UDC:519.61:672.4(043.2)
COBISS.SI-ID:28584451 This link opens in a new window
Publication date in RUL:08.09.2020
Views:1838
Downloads:131
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Secondary language

Language:English
Title:The design of sheet metal bulge test
Abstract:
Bulge test apparatus needs to be constructed in order to be used in YLD2000-2d yield criteria on case of AISI 304 stainless steel. Thesis includes construction and use of hydraulic bulge test aparatus. Lankford coefficients and yield curve are determined based on pressure and metal sheet deformation. In order to determine main design parameters finite element analysis was used. Measurements and calculations are done based on ISO 16808 standard. Measurements showed that AISI 304 material has anisotropic properties under biaxial loading conditions. The value of coefficient of biaxial anisotropy is 1,089 and normalised biaxial yield stress $ is 0,935.

Keywords:plastic anisotropy, biaxial stress, apparatus design, finite element analysis, theory of plasticity, material properties, Lankford coeficients

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