Table 9 Comparison of fatigue test results and evaluation of life of butt test specimens
From: Unified Principal S–N Equation for Friction Stir Welding of 5083 and 6061 Aluminum Alloys
Stress type | Stress value (MPa) | 50% S–N curve fatigue assessment life (times) | Load range (kN) | Test fatigue life (times) |
|---|---|---|---|---|
\(\Delta S\)(Nominal stress range) | 99.0 | 1778354 | 0.3–30 | type1: 349440 type2: 239440 |
\(\Delta \sigma_{\max }\)(Finite element maximum principal stress variation range) | 147.6 | 575864 | ||
\(\Delta \sigma_{s}\)(Structural stress range) | 149.5 | 198236 | ||
\(\Delta \sigma_{s}\)(Equivalent structural stress variation range) | 150.1 | 240612 |