Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..352h&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 352-353 (SEE N92-10728 01-91)
Physics
Geophysics
Asteroids, Collision Parameters, Collisions, Computer Programs, Computerized Simulation, Gravitational Effects, Hypervelocity Impact, Impactors, Solar System, Astronomical Models, Fracture Strength, High Pressure, Mass Ratios, Nonlinear Systems, Rocks, Silicates, Vapor Phases
Scientific paper
The prediction of events leading to the catastrophic collisions and disruption of solar system bodies is fraught with the same difficulties as are other theories of impact events; since one simply cannot perform experiments in the regime of interest. In the catastrophic collisions of asteroids that regime involves bodies of a few tons to hundred of kilometers in diameter, and velocities of several kilometers pre second. For hundred kilometer bodies, gravitational stresses dominate material fracture strengths, but those gravitational stresses are essentially absent for laboratory experiments. Only numerical simulations using hydrocodes can in principle analyze the true problems, but they have their own major uncertainties about the correctness of the physical models and properties. The question of the measure of the impactor and its energy coupling is investigated using numerical code calculations. The material model was that of a generic silicate rock, including high pressure melt and vapor phases, and includes material nonlinearity and dissipation via a Mie-Gruniesen model. A series of calculations with various size ratios and impact velocities are reported.
Choe K. Y.
Holsapple Keith A.
No associations
LandOfFree
Energy coupling in catastrophic collisions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Energy coupling in catastrophic collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy coupling in catastrophic collisions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1276645