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Table 5 Sample 1-5 surface residual stress

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

Sample number

σx (MPa)

Stand deviation (MPa)

σy (MPa)

Stand deviation (MPa)

1

198

32

190

16

2

206

25

188

18

3

194

18

206

34

4

189

23

205

12

5

197

18

189

14

Mean value

196.8

23.2

195.6

18.8