说明：  多种对于材料S-N曲线的修正方程，考虑平均应力对S-N曲线的影响，包括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)
(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))