Table 7 Comparison of fatigue test results and evaluation life of test sample type 1
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) |
|---|---|---|---|---|
\(\Delta \sigma\)(Nominal stress range) | 156.8 | 485317 | 4.0–0.4 | 446048 |
\(\Delta \sigma_{\max }\)(Finite element maximum principal stress range) | 103.5 | 1564338 | ||
\(\Delta \sigma_{s}\)(Structural stress range) | 146.2 | 211510 | ||
\(\Delta S\)(Equivalent structural stress range) | 141.1 | 302715 |