The simulations on this page try to reproduce experimental results provided by V.S. Deshpande, University Cambridge. A strong pressure wave in water is created by firing a steel projectile on a piston at the end of the tube. The wave propagates through the tube and impinges onto a thin copper plate sealing the other end. Depending on the initial projectile velocity the pressure induces plastic deformation of different rupture patterns.
The experimental facility is described in debth in V.S. Deshpande, A. Heaver, N.A. Fleck, An underwater shock simulator. Royal Society of London Proceedings Series A, 462(2067):1021-1041, 2006.
Fluid
Solid with SFC
More details can be found in F. Cirak, R. Deiterding, S.P. Mauch, Large-scale fluid-structure interaction simulation of viscoplastic and fracturing thin shells subjected to shocks and detonations, Computer & Structures 85 (11-14): 1049-1065, 2006.
Comparison of plate for p0=34MPa at the end of the simulation (1ms simulated) and after the experiment:
Task | F=6, S=2 | F=12, S=4 | F=24, S=8 | F=48, S=16 | F=96, S=32 | |||||
s | % | s | % | s | % | s | % | s | % | |
Integration | 1246 | 27.3 | 628 | 22.4 | 349 | 16.1 | 183 | 12.5 | 83 | 8.8 |
Boundary sync | 1884 | 41.3 | 1113 | 39.6 | 1044 | 48.1 | 735 | 50.1 | 447 | 47.3 |
Recomposition | 152 | 3.3 | 154 | 5.5 | 138 | 6.4 | 124 | 8.5 | 98 | 10.4 |
Interpolation | 46 | 1.0 | 27 | 1.0 | 15 | 0.7 | 8 | 0.5 | 4 | 0.4 |
Regridding | 33 | 0.7 | 24 | 0.9 | 13 | 0.6 | 6 | 0.4 | 4 | 0.4 |
GFM Find cells | 144 | 3.2 | 76 | 2.7 | 43 | 2.0 | 23 | 1.6 | 11 | 1.2 |
GFM Interpolation | 458 | 10.0 | 242 | 8.6 | 133 | 6.1 | 69 | 4.7 | 33 | 3.5 |
GFM Overhead | 72 | 1.6 | 21 | 0.7 | 6 | 0.3 | 7 | 0.5 | 3 | 0.3 |
CPT | 22 | 0.5 | 17 | 0.6 | 15 | 0.7 | 13 | 0.9 | 12 | 1.3 |
Level set sync | 119 | 2.6 | 206 | 7.3 | 187 | 8.6 | 134 | 9.1 | 107 | 11.3 |
ELC | 260 | 5.7 | 208 | 7.4 | 165 | 7.6 | 117 | 8.0 | 102 | 10.8 |
Coupling data calc | 25 | 0.5 | 9 | 0.3 | 6 | 0.3 | 4 | 0.3 | 2 | 0.2 |
Misc | 105 | 2.3 | 84 | 3.0 | 55 | 2.5 | 43 | 2.9 | 39 | 4.1 |
Total | 4566 | 2809 | 2169 | 1466 | 945 |
F denotes the number of CPUs for the fluid solver, S the number of CPUs for the solid solver.
-- RalfDeiterding - 12 Feb 2007
I | Attachment | Size | Date | Who | Comment |
---|---|---|---|---|---|
PPlateLegend3d.mpg | 2490.8 K | 12 Feb 2007 - 22:02 | RalfDeiterding | Impact of the pressure wave on the plate, legends for all quantities displayed | |
PPlate3d.mpg | 1841.4 K | 12 Feb 2007 - 22:03 | RalfDeiterding | Impact of the pressure wave on the plate without legend displayed | |
PPlateVelocity3d.mpg | 890.9 K | 12 Feb 2007 - 22:05 | RalfDeiterding | Plate alone, velocity component in plate normal direction displayed | |
PPlateLev3d.mpg | 447.9 K | 12 Feb 2007 - 22:05 | RalfDeiterding | Refinement levels in entire domain |