Numerično modeliranje in mehanska analiza varjenih spojev

Legat, Matej (author), Mole, Nikolaj (mentor), Koc, Pino (comentor)

V magistrskem delu je predstavljena obravnava različnih tehnik numeričnega modeliranja varov in analize mehanskega stanja v njih na osnovi metode končnih elementov. Najprej so predstavljene različne metode za vrednotenje napetosti v varih, nato pa se delo osredotoči na tehnike numeričnega modeliranja varov na osnovi metode končnih elementov. Mehansko je analiziran varjeni križni spoj, na katerem je bila uporabljena geometrijska metoda in različni pristopi numeričnega modeliranja. Nato so obravnavani različni varjeni spoji pri segmentu cisterne za utekočinjen naftni plin. Poseben poudarek je na tehnikah numeričnega modeliranja varov. Rezultati mehanskih analiz so ob upoštevanju različnih lupinskih modelov primerjani z rezultati, izračunanimi na osnovi volumskega modela.

• Language: Slovenian
• Keywords: metoda geometrijskih napetosti, metoda končnih elementov, mehanska analiza, tehnike numeričnega modeliranja varov, koncentracije napetosti, vari
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Legat]
• Year: 2021
• Number of pages: XXIV, 62 str.
• PID: 20.500.12556/RUL-125652
• UDC: 621.791.05:519.61:004.942(043.2)
• COBISS.SI-ID: 59704579
• Publication date in RUL: 30.03.2021

LEGAT, Matej, 2021, Numerično modeliranje in mehanska analiza varjenih spojev [online]. Master’s thesis. Ljubljana : M. Legat. [Accessed 10 June 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=125652

Secondary language

• Language: English
• Title: Numerical modeling and mechanical analysis of welded joints

Abstract

This thesis presents the treatment of various techniques of numerical weld modelling and the analysis of their mechanical state, based on the finite element method (FEM). Firstly, some of the stress assesment methods are presented and then the thesis focuses on numerical modelling techniques based on the finite element method. A mechanical analysis follows of the crusiform join, on which both the hot spot stress approach and different numerical modelling techniques were applied. In addition, various welded joints in the liquified petroleum gas tank segment are discussed. Special emphasis is placed on the techniques of numerical modeling of welds. Finally, there is a comparison of the results of mechanical analysis, taking into account different shell models with the results calculated on the basis of the volume model.

• Keywords: hot spot method, finite element method, mechanical analysis, numerical weld modelling techniques, stress concentration, welds