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Complex crater formation1 after an oblique (30°) impact of a 5 km sized projectile at 6.5 km/s into a granitic target2. For more information, see3.

Animation of a 100 m sized projectile hitting the centre of Berlin.

Animation of a huge impact hitting the Earth at an angle of 45°.

Giant impact at an angle of 30°. Tracers are colored by peak pressures (range 0...3 GPa).

Giant impact at an angle of 60°.

Simulation of the ejecta plume (preliminary results). Left side shows material, right side shows density.

Damage distribution after a vertical impact (two-dimensional simulation).

Two-dimensional simulation of the Lituya-Bay tsunamigenic landslide event. Part of a validation study.

Wave generation after an oblique (30°) impact of a 1 km size projectile into 3 km deep water3.

Collapsing water column. Part of a validation study presented in3.

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Examples for multi-material simulations in three dimensions

Damage accumulation during oblique impacts

Dunite projectile (radius r=800 m) impacting at 6.5 km/s and an impact angle of 45° into a granitic target. Strength model for rock is used as well as the acoustic fluidization mechanism, low-density weakening and thermal softening. Damage model is from Collins et al. (2004). Porosity is neglected here. Video and snapshots below show crater evolution. Material plot is shown top, bottom shows damage accumulation.

Granitic projectile (radius r=800 m) impacting at 6.5 km/s and an impact angle of 45° into a target composed of dunite covered by a 2 km-thick layer of granite. Strength model for rock is used as well as the acoustic fluidization mechanism, low-density weakening and thermal softening. Damage model is from Collins et al. (2004). Porosity is neglected here. Video and snapshots below show crater evolution. Material plot is shown top, bottom shows damage accumulation.

Oceanic impact into shallow water

Granitic projectile (radius r=800 m) impacting at 6.5 km/s and an impact angle of 45° into 1.8 km deep water above granitic target. For granite, strength model for rock is used as well as the acoustic fluidization mechanism, low-density weakening and thermal softening. Damage model is from Collins et al. (2004). Porosity is neglected here.

Giant collision events

References

1 Elbeshausen D. and Wünnemann K. (2008) Complex crater formation driven by oblique meteorite impacts. LMI IV #3078.

2 Elbeshausen D. and Wünnemann K. (2008) Asymmetries in complex craters due to oblique meteorite impacts? LMI IV #3080.

3 Elbeshausen D. (2012) Dreidimensionale numerische Simulation schräger Meteoriteneinschläge - Strategien und Anwendungen. PhD-Thesis, FU-Berlin.

giant_impact_multmat01.gif View (1.32 MB) Dirk Elbeshausen, 10/05/2011 11:03 PM