A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects

Table 1

Experimental data and the predicted results of 45 steel.

Loading stress level/Mpa	Load sequences	𝑛1	𝑛1/𝑁𝑓1	𝑛2	𝑛2/𝑁𝑓2 (E.)	𝑛2/𝑁𝑓2 (P.)	Error/%
331.46–284.4	High-low	12,500	0.250	250,400	0.5008	0.4241	−15.32
		25,000	0.500	168,300	0.3366	0.2411	−28.37
		37,500	0.750	64,500	0.1290	0.1082	−16.12
284.4–331.46	Low-high	12,500	0.250	37,900	0.7580	0.9693	27.88
		250,000	0.500	38,900	0.7780	0.8247	6.00
		375,000	0.750	43,400	0.8680	0.5145	−40.73