Napovedovanje dobe trajanja dinamično obremenjenih zvarnih spojev

Muc, Matic (author), Klemenc, Jernej (mentor)

V magistrski nalogi smo se ukvarjali z napovedovanjem dobe trajanja dinamicno obremenjenih zvarnih spojev. Naˇs glavni cilj je bil oblikovanje testnih epruvet, ki sluzijo kot referenca za primerjavo razliˇcnih materialov in metod, ki jih uporabljamo za napoved dobe trajanja dinamicno obremenjenih elementov. Preizkuˇsance izbrane oblike smo testirali na razlcnih napetostnih nivojih tako, da smo lahko izrisali Wohlerjeve krivulje za preizkusance iz referencnega in testnega materiala. Rezultate fizicnih preizkusov smo nato primerjali z napovedjo s pomocjo standarda EUROCODE, z metodo geometrijskih napetosti in z metodo, ki je vgrajena v programski paket FEMFAT.

• Language: Slovenian
• Keywords: lahka gradnja obratovalna trdnost utrujenostna poˇskodba W¨ohlerjeva krivulja metoda konˇcnih elementov EUROCODE metoda geometrijskih napetosti
• Work type: Master's thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Muc]
• Year: 2018
• Number of pages: XXVI, 75 str.
• PID: 20.500.12556/RUL-101669
• UDC: 519.61:621.791.053(043.2)
• COBISS.SI-ID: 16139803
• Publication date in RUL: 24.06.2018

Secondary language

• Language: English
• Title: Estimating durability of dynamically loaded weld joints

Abstract

This master thesis deals with estimating durability of dynamically loaded welded joints. The main objective was to design a test specimen that would be used for a comparison of different materials and methods for estimating the fatigue life of dynamically loaded welded elements. Designed specimens were tested with different stress amplitudes. On the basis of experimental results W¨ohler curves for both reference and test specimens were modelled. At the end test results were compared to the results calculated using EUROCODE standard, hot spot method and method that is built into the FEMFAT software.

• Keywords: lightweight design against fatigue fatigue damage W¨ohlers curve finite element method EUROCODE hot spot method