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Shock and Vibration
/
2020
/
Article
/
Tab 1
/
Research Article
Study of the Growth Process of Original Crack in the Surrounding Rock of Tunnel under the Adjacent Explosive Load
Table 1
Dynamic optical constants of the model material.
Material
ρ
(kg/m
3
)
C
d
(m/s)
C
s
(m/s)
E
d
(GN/m
2
)
υ
d
|
C
t
| (m
2
/N)
PMMA
1145
2190
1200
3.595
0.32
0.084