PSI - Issue 76
D. Kaschube et al. / Procedia Structural Integrity 76 (2026) 19–26
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10 7
10 7
Predicted Cycles to failure N f C − M 10 3 10 4 10 5 10 6 R 2 = 0 . 2422 R 2 = 0 . 7741 R 2 = 0 . 9504
R 2 = 0 . 3998 R 2 = 0 . 8635
Predicted Cycles to failure N f Morrow 10 2 10 3 10 4 10 5 10 6
± 3 R ε = 0 R ε = −∞ R ε = − 1
+ − 3 R ε = 0 R ε = −∞
10 2
10 2
10 3
10 4
10 7
10 2
10 3
10 4
10 7
10 5
10 6
10 5
10 6
Experimental Cycles to failure N f
Experimental Cycles to failure N f
(a) Co ffi n-Manson
(b)Morrow
10 7
10 7
R 2 = 0 . 7707 R 2 = 0 . 9377
R 2 = 0 . 7069 R 2 = 0 . 8878
Predicted Cycles to failure N f I − G 10 3 10 4 10 5 10 6
Predicted Cycles to failure N f SWT 10 3 10 4 10 5 10 6 10 3 Predicted Cycles to failure N f Walker R 2 = 0 . 6348 R 2 = 0 . 9444 R 2 = 0 . 8299 R 2 = 0 . 8034 R 2 = 0 . 9047 R 2 = 0 . 3502 10 4 10 5 10 6 10 7 10 2 10 3 10 2
± 3 R ε = 0 R ε = −∞
± 3 R ε = 0 R ε = −∞
10 2
10 4
10 7
10 2
10 3
10 4
10 7
10 5
10 6
10 5
10 6
Experimental Cycles to failure N f
Experimental Cycles to failure N f
(c) Smith-Watson-Topper
(d) Ince-Glinka
10 7
R 2 = 0 . 8447 R 2 = 0 . 9664
2 Predicted Cycles to failure N f MSWT 10 3 10 4 10 5 10 6
+ − 3 R ε = 0 ,γ = 0 . 67 R ε = −∞ ,γ = 0 . 67 R ε = 0 ,γ = 0 . 40 R ε = −∞ ,γ = 0 . 40 R ε = 0 ,γ = 0 . 10 R ε = −∞ ,γ = 0 . 10
± 3 R ε = 0 R ε = −∞
10 2
10
2
10 3
10 4
10 7
10 2
10 3
10 4
10 7
10 5
10 6
10 10 10 5 10 6
10
Experimental Cycles to failure N f
Experimental Cycles to failure N f
(e) Walker with di ff erent γ values
(f) Modified Smith-Watson-Topper
Fig. 3: Comparison of experimental life and predicted life using di ff erent mean strain models.
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