1.1. Rules of Thumb

 

 

1.2. Fatigue

Damage ˶̴ (stress range)^3

Yield stress does not affect the fatigue resistance of welded connection
2% higher stress range will result to a reduction of 1.2^3 of the fatigue lifetime ( three since m=3)
3 years/1.2^3=1.73 years
Nnew=c/(1.2Δσ)^3