1

LS-DYNA geometry for the DRDC LS-DYNA geometry for the DRDC experiment.experiment.

*Test performed by Defence R&D Canada, Williams et. Al.

SPH C4 Charge5 cm DOB8 cm thick

12.5 cm radius6.2 kg

10 metric ton ring to simulate vehicle mass

Steel Support Frame

Al 5083 plate3.175 cm thick

2

SPH simulation of DRDC SPH simulation of DRDC experiment.experiment.

Measured displacements: 30.0 cm center, -5.0 cm at edge.

Z-disp (cm)

3

ALE simulation of DRDC ALE simulation of DRDC experiment.experiment.

Soil Contours

AVI

4

DRDC plate deformation calculated from the LS-DRDC plate deformation calculated from the LS-DYNA SPH simulation.DYNA SPH simulation.

Measured displacements: 30.0 cm center, -5.0 cm at edge.

Z-disp (cm)

5

DRDC plate deformation calculated from the LS-DRDC plate deformation calculated from the LS-DYNA ALE simulation.DYNA ALE simulation.

~25 ± 2cm, depending on soil compaction compared to 30 cm measured.

6

Model geometry for the dynamic shell buckling Model geometry for the dynamic shell buckling airblast analysis.airblast analysis.

Planar pressure

load

ALE air

Aluminum shell(tied to plugs)

Steel plugs(constrained translation)

7

Air Blast Analysis ResultsAir Blast Analysis Results

Test* Calculation*Photo from Lindberg and Florence, “Dynamic Pulse Buckling,” 1987

8

Model geometry for vehicle blast simulation.Model geometry for vehicle blast simulation.

9

Contours of pressure during blast-vehicle interaction.

(a) t = 0.1 ms(b) t = 1.1 ms

(c) t = 4.4 ms

10

Damage to vehicle at 13.0 ms. Damage to vehicle at 13.0 ms.

Vehicle Damage