magistrsko delo
Matevž Štumberger (Author), Janez Kramberger (Mentor), Tomaž Vuherer (Co-mentor)

Abstract

Magistrsko delo predstavlja numerično simulacijo varjenja. Varjenje je spajanje kovinskih ali nekovinskih delov s postopki dodajanja materiala. Proces varjenja je v programskem paketu Abaqus/CAE obravnavan kot nevezana toplotno – mehanska analiza z ločenim izračunom temperaturnega in napetostnega polja. Gibajoči toplotni varilni vir je modeliran na način definiranja začetne temperaturne porazdelitve v zvarni kopeli. Zaradi kompleksnosti fizikalnega dogajanja v zvarni kopeli je potrebno določene fizikalne procese zanemariti. Temeljno oviro pri numeričnem modeliranju varjenja predstavlja pridobitev ustreznih toplotnih in mehanskih lastnosti materiala v odvisnosti od temperature. Iz tega razloga so enaki podatki uporabljeni za osnovni in dodajni material. Analiza prenosa toplote je obravnava kot časovno odvisen problem in je uporabljena za izračun zaostalih varilnih napetosti pri napetostno – deformacijski analizi.

Keywords

varjenje;termične obremenitve;zaostale napetosti;numerične simulacije;nevezana toplotno-mehanska analiza;Abaqus/CAE;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [M. Štimberger]
UDC: 519.876.5:621.791(043.2)
COBISS: 19551766 Link will open in a new window
Views: 1783
Downloads: 234
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Other data

Secondary language: English
Secondary title: Numerical welding simulation
Secondary abstract: The master’s thesis presents numerical welding simulation. Welding is a fabrication process that joins metal or non-metal materials, by adding molten filler material to base material. Welding process is modelled in Abaqus/CAE software as uncoupled thermo – mechanical analysis with separated calculation of thermal and stress field. The approach of defining the initial temperature distribution in weld pool is used to model moving heat source. It is necessary to simplify and neglect some physical processes in welding pool in order to decrease the level of complexity. The main problem by welding simulations is to obtain a temperature dependent characteristic material data. For that reason the same data were used for filler and base material. Transient heat transfer analysis was imported in structural analysis to calculate residual stresses.
Secondary keywords: welding;thermal load;residual stresses;numerical simulations;uncoupled thermal-mechanical analysis;Abaqus/CAE;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo, Konstrukterstvo
Pages: XIII, 56 f.
ID: 9130070