Numerical modeling demonstrates the evolution of dynamic resistance and nugget growth in AISI 1008 steel spot welds, indicating accurate simulation of electro-thermal contact dynamics.
Current and heat flow at the contact surfaces of electrode and sheet materials play a vital role in joining of sheet metals by the Resistance Spot Welding (RSW) technique. Further, the contact resistances primarily depend on contact pressure and temperature during the RSW process. In this article, a 2-D axisymmetric, fully coupled electro-thermomechanical model developed in COMSOL software is used to study the effects of weld current and time on the evolution of temperatures, dynamic resistance and nugget size. Contact conductance method for contact resistances and latent heat capacity method for phase change (melting/solidification) process are used. The predicted nugget sizes are compared with experimental data.
No takes yet. Share an insight, caveat, or question.
Gillela et al. (2022) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: