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Mathematical Problems in Engineering
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Mathematical Problems in Engineering
/
2015
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Article
/
Tab 3
/
Research Article
Three-Dimensional Numerical Analysis of the Tunnel for Polyaxial State of Stress
Table 3
Internal friction angle
and equivalent internal friction angle
.
(°)
15
20
25
30
35
40
(°)
8.55
11.90
15.54
19.47
23.71
28.27