From: Structural Stress–Fatigue Life Curve Improvement of Spot Welding Based on Quasi-Newton Method
SFFXY | SFFZ | SFMXY |
0.02 | 5.95 × 10−7 | 4.11 × 10−7 |
DEFXY | DEFZ | DEMXY |
2.46 × 10−6 | 1.92 × 10−6 | 1.04 × 10−6 |
TEFXY | TEFZ | TEMXY |
1.17 × 10−6 | 3.28 × 10−6 | 7.06 × 10−7 |