Table 5 Main physical parameters of the projectile, incident bar, and transmission bar.

From: Damage and reliability analysis of double-arch tunnel without a middle pilot tunnel under blast load

Parameter

Parameter value

Parameter

Parameter value

Diameter (mm)

50

P-wave velocity (m/s)

5410

Projectile length (mm)

400

Elastic modulus (GPa)

210

Incident bar length (mm)

2000

Poisson's ratio

0.28

Transmission bar length (mm)

2000

Density (kg/m3)

7810