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

Table 3

Experimental data and comparison results of cumulative damage predictions by the proposed model and existing model for butt joint.

Load mode	𝜎1/Mpa	𝜎2/Mpa	𝑛1/10^3	𝑛2/10^3	𝑁𝑓1	𝑁𝑓2	𝐷 (by the existing model [31])	𝐷 (by the proposed model)
Mode 1	104	74	109.9	797.6	549,300	1,540,100	0.9260	0.8988
Mode 2	89	74	176.1	1029.2	880,500	1,540,100	1.0810	0.9372
Mode 3	74	89	770.1	545.6	1,540,100	880,500	0.9290	1.0660
Mode 4	74	104	770.1	418.9	1,540,100	549,300	1.0140	1.1053