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Table 7 Surface and peak equivalent stress level

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

Sample numberSurface equivalent stress levelPeak equivalent stress level
10.65σ0.20.80σ0.2
20.75σ0.20.91σ0.2
30.85σ0.21.02σ0.2
40.95σ0.21.12σ0.2
5