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Measurement of Residual Stresses by the Hole-Drilling Strain Gage Method

TABLE 1 *
DEPTH
MEASURED STRAIN
 
RELIEVED STRAINS
COEFFICIENTS
Mulitplier of (10) -8
with and
Equiv. Uniform Stress to Depth (1000 psi).
(in)

%

%

%
0
0
e1
0
0
0%
0
0%
0
0%
0
0
e2
0
e3
0
4 
4 
0.005
0.025
e1
-23
-37
16%
+9
13%
-19
12%
0.016
0.030
-32 deg
+16
+37
e2
-9
-0.035
-0.051
e3
-14
4 
-0.140
4 
-0.204
0.010
0.050
e1
-49
-80
34%
+18
27%
-38
25%
0.036
0.067
-32 deg
+16
+35
e2
-21
-0.079
-0.113
e3
-31
4 
-0.315
4 
-0.453
0.020
0.099
e1
-90
-145
61%
+35
52%
-85
56%
0.078
0.148
-34 deg
+12
+30
e2
-30
-0.171
-0.250
e3
-55
4 
-0.683
4 
-1.000
0.030
0.149
e1
-118
-186
78%
+50
75%
-120
78%
0.111
0.227
-34 deg
+11
+28
e2
-33
-0.243
-0.384
e3
-68
4 
-0.972
4 
-1.535
0.040
0.198
e1
-136
-209
88%
+63
94%
-137
90%
0.133
0.282
-33 deg
+10
+26
e2
-36
-0.291
-0.477
e3
-73
4 
-1.165
4 
-1.906
0.050
0.248
e1
-143
-219
92%
+67
100%
-143
93%
0.145
0.328
-32 deg
+10
+24
e2
-38
-0.318
-0.554
e3
-76
4 
-1.270
4 
-2.217
0.060
0.297
e1
-146
-225
95%
+67
100%
-145
95%
Beyond Range
e2
-40
e3
-79
4 
4 
0.081
0.40
e1
-152
-237
100%
+67
100%
-153
100%
0.147
0.374
-33 deg
+12
+25
e2
-42
-0.322
-0.632
e3
-85
4 
-1.288
4 
-2.528
1
2
3
4
5
6
7
8
9
10
11

*Data rounded for tabulation.



Material: Cold Rolled Steel