Introduction - If you have any usage issues, please Google them yourself
A variety of correction equations for S-N curves of materials, considering the effect of mean stress on S-N curves, including
ASME Safety Factor (ASME)
Gerber Safety Factor (Gerber)
Goodman Safety Factor (Goodman)
Langer Safety Factor (Langer)
Von Mises stress due to alternating loading (VM_Stress_Alt)
Von Mises stress due to mean loading (VM_Stress_Mean)