Start of topic | Skip to actions

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

- Pressure wave generated by solving equation of motion for piston during entire fluid-structure simulation. Piston mass: 238g. The initial velocity v0 is varied to create different loading conditions with initial pressure p0.
- Full water shock tube of 1.3m length, 64mm diameter considered in fluid. 1d simulations used to provide proper flow field for coupled 3d simulations.
- Modeling of water with stiffened gas equation of state with
- Multi-dimensional 2nd order upwind finite volume scheme, negative pressures from cavitation avoided by energy correction
- AMR base level: 350x20x20, 2 additional levels, refinement factor 2,2.
- Approx. 1.2M cells used in fluid on average instead of 9M (uniform)
- An unsigned distance function is used to allow the simulation of the rupture event.

Solid with SFC

- Copper plate of 0.25mm, J2 plasticity model with hardening, rate sensitivity, and thermal softening, cohesive interface model
- Solid mesh: 4675 nodes, 8896 elements
- 12 nodes 3.4 GHz Intel Xeon dual processor, Gigabit ethernet network, ca. 800h CPU to t=1ms
- Source codes: [fluid codes] [solid codes]

- For p0=34MPa the shell solver with fracture model approximately reproduces the results of the plastic simulation.
- Movie of plate plate velocities in axial direction and pressure loading

Pressure traces | Plate deformation |

- Movie of fluid volume fraction velocities in axial direction
- Movie of plate plate velocities in axial direction and pressure loading

Pressure traces | Plate deformation |

- Movie of fluid volume fraction velocities in axial direction
- Movie of plate plate velocities in axial direction and pressure loading

Pressure traces | Plate deformation |

- Movie of fluid volume fraction velocities in axial direction
- Movie of plate plate velocities in axial direction and pressure loading

Pressure traces | Plate deformation |

- Movie of fluid volume fraction velocities in axial direction
- Movie of plate plate velocities in axial direction and pressure loading

Pressure traces | Plate deformation |

-- RalfDeiterding - 21 Apr 2008

I | Attachment | Size | Date | Who | Comment |
---|---|---|---|---|---|

Press34MPa.mpg | 5267.8 K | 11 Mar 2008 - 20:08 | RalfDeiterding | Plate deformation, p0=34MPa | |

Press88MPa.mpg | 5437.1 K | 11 Mar 2008 - 20:09 | RalfDeiterding | Pressure loading, p0=88MPa | |

VFrac88MPa.mpg | 6085.2 K | 11 Mar 2008 - 20:10 | RalfDeiterding | Volume fraction, p0=88MPa | |

Press173MPa.mpg | 3063.6 K | 11 Mar 2008 - 20:11 | RalfDeiterding | Pressure loading, p0=173MPa | |

VFrac173MPa.mpg | 3182.0 K | 11 Mar 2008 - 20:12 | RalfDeiterding | Volume Fraction, p0=173MPa | |

Press64MPa.mpg | 6173.6 K | 18 Mar 2008 - 18:38 | RalfDeiterding | Pressure loading, p0=64MPa | |

VFrac64MPa.mpg | 7296.0 K | 18 Mar 2008 - 18:39 | RalfDeiterding | Volume Fraction, p0=64MPa | |

Press130MPa.mpg | 3934.3 K | 18 Mar 2008 - 18:39 | RalfDeiterding | Pressure loading, p0=130MPa | |

VFrac130MPa.mpg | 4110.7 K | 18 Mar 2008 - 18:40 | RalfDeiterding | Volume Fraction, p0=130MPa |

Copyright © 1997-2022 California Institute of Technology.