A theoretical study on electrical and thermal response in resistance spot welding

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The effect of contact resistance including constriction and contamination resistance has been a major hurdle for the thermoelectrical analysis of the resistance spot welding process. In this paper, a simple model was suggested and used for calculating the electrical and thermal response of the resistance spot welding process to investigate the influence of contacting forces on the formation of weld nuggets. The electrode surface of the contact interface was assumed to be axisymmetric and its micro-asperities to have a trapezoidal cross-section. These microasperities were considered as the one-dimensional contact resistance elements in the finite element formulation. The contamination film was assumed to be a nonconducting oxide layer, which is very brittle, so that it is broken to some number of pieces when a contacting pressure is being applied. The crushed films were assumed to be distributed at regular intervals and to conserve their size and number during the welding process. The simulation results revealed that the proposed model can be successfully used to predict the effect of the contact resistance on the electrical and thermal response of the resistance spot welding process.
Publisher
AMER WELDING SOC
Issue Date
1996-08
Language
English
Article Type
Article
Keywords

CONTACTS; MODEL

Citation

WELDING JOURNAL, v.75, no.8, pp.233 - 241

ISSN
0043-2296
URI
http://hdl.handle.net/10203/76677
Appears in Collection
ME-Journal Papers(저널논문)
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