| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Advanced Joining Technologies for Automotive Lightweight Structures
|
| Presentation Title |
Development of an Analytical Model for Electrode Wear during Resistance Spot Welding |
| Author(s) |
Rafael Giorjao, Olga Eliseeva, Jerry Gould |
| On-Site Speaker (Planned) |
Rafael Giorjao |
| Abstract Scope |
Electrode wear during resistance spot welding has been modelled using an analytical thermomechanical approach and compared with experimental data. Thermal profiles in the spot weld and electrode are estimated using a one-dimensional Zener approximation solution. The thermal profile are based on a thermal balance between the material stack-up, nugget penetration and electrode geometry, as well the material's relative conductivity and geometry. Results for a single weld cycle allowed prediction of a forge zone at the electrode face. Deformation of this zone under the applied stress then defined the wear and relative resultant changes in electrode geometry. Electrode wear could then be predicted as a summation of these deformations from weld to weld. Initial results were shown consistent with representative electrode life tests for a broad range of weld parameters. The equations were then used to understand underlying physical phenomena associated with electrode wear. |