A model was developed to simulate the temperature distribution and nugget formation during resistance spot welding (RSW) of zinc-coated steels. It employs a coupled thermal-electrical-mechanical analysis simulating the dynamic RSW process. Temperature-dependent thermal-electrical-mechanical material properties were considered including contact-resistance. The contact area was determined from a coupled thermal-mechanical analysis. A layer of transition elements was used to represent the change of contact area by killing or activating elements. The heat generation and temperature field were computed in a coupled thermal-electrical model. All these analyses were solved using the commercial finite element method (FEM) based on ANSYS code, and some advanced functions were used by writing a paragraph of codes by the authors. Compared with the results from only coupled thermal-electrical model in which contact area was uniform during the whole process, the result matches better to the experimental results.
Dynamic simulation of resistance spot welding of zinc-coated steels
China Welding ; 15 , 4 ; 39-42
2006
4 Seiten, 4 Bilder, 5 Tabellen, 4 Quellen
Article (Journal)
English
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