Wohler S-N curve: fatigue-life N_f decreases as cyclic-stress amplitude S increases; Basquin power-law S = sigma_f' (2 N_f)^b; Coffin-Manson 1953 low-cycle fatigue: Delta epsilon_p / 2 = epsilon_f' (2 N_f)^c.
Wohler S-N curve: fatigue-life N_f decreases as cyclic-stress amplitude S increases; Basquin power-law S = sigma_f' (2 N_f)^b; Coffin-Manson 1953 low-cycle fatigue: Delta epsilon_p / 2 = epsilon_f' (2 N_f)^c.