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Table 6 Cyclic loading stress parameters

From: Residual Stress Relaxation of Thin-walled Long Stringer Made of Aluminum Alloy 7050-T7451 under Transportation Vibration

Initial residual stress (MPa)Sample numberEquivalent stress levelLoading stress (MPa)Loading force peak (N)Loading force valley (N)
σxsuf= 196.8
σysuf= 195.6
10.65σ0.21395560556
20.75σ0.21927680768
30.85σ0.22439720972
40.95σ0.2292116801168
5