Contact Pressure and Residual Strain of Resistance Spot Welding on Mild Steel Sheet Metal
Coupled electrical–thermal and thermo-elastic–plastic analyses were performed to analyze the behavior of the mechanical features during the resistance spot welding (RSW) process including the squeeze, heating, and hold steps, and to prepare for further structural analysis for large, complex structures with a large quantity of resistance spot welds. A two-dimensional axisymmetric thermo-elastic–plastic FEM model was developed and analyzed in the commercial FEM program, ANSYS. The analysis was based on the transient temperature field obtained from a transient electrical–thermal simulation of the RSW process conducted by the authors. The distribution and change of the contact pressure at the electrode–workpiece interface and faying surface, the residual stress, and the residual plastic strain distribution of the weldment were obtained through the analysis.
KeywordsResistance spot welding Temperature field Contact pressure Residual strain
Yuanxun Wang: Project supported by the financial support from the National Natural Science Foundation of China (11072083).
- 3.Browne DJ, Chandler HW, Evans J, Wen TJ (1995) Computer simulation of resistance spot welding in aluminum: part I. Weld J 74:339s–344sGoogle Scholar
- 6.Cho HS, Cho YJ (1989) A study of the thermal behavior in resistance spot welds. Weld J 68:236s–244sGoogle Scholar
- 13.Nied HA (1984) The finite element modeling of the resistance spot welding process. Weld J 63:123s–132sGoogle Scholar
- 15.Tsai CL, Dai WL, Dickinson DW, Papritan JC (1991) Analysis and development of a real-time control methodology in resistance spot welding. Weld J. 70:339s–351sGoogle Scholar
- 16.Vogler M, Sheppard S (1993) Electrical contact resistance under high loads and elevated temperatures. Weld J. 72:231s–238sGoogle Scholar
- 17.Yeung KS, Thornton PH (1999) Transient thermal analysis of spot welding electrodes. Weld J. 78:1s–6sGoogle Scholar