Table 11 Results of four optimization methods
From: Structural Stress–Fatigue Life Curve Improvement of Spot Welding Based on Quasi-Newton Method
Optimization methods | S–N curve | R2 |
|---|---|---|
C1 | lg S = − 0.1694 lg N + 3.2506 | 0.8445 |
C2 | lg S = − 0.17493 lg N + 3.4901 | 0.8906 |
C3 | lg S = − 0.16948 lg N + 3.2811 | 0.8573 |
C4 | lg S = − 0.1704 lg N + 3.26216 | 0.8874 |