Rock-Mechanical Constraints on SPH Applications to Asteroid Impact Evolution

Details Rock-Mechanical Constraints on SPH Applications to Asteroid Impact Evolution Rock-Mechanical Constraints on SPH Applications to Asteroid Impact Evolution

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p71a0433b&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #P71A-0433

Computer Science

Learning

5100 Physical Properties Of Rocks, 6022 Impact Phenomena, 6205 Asteroids And Meteoroids

Scientific paper

The smooth particle hydrodynamics (SPH) code as adapted for dynamic brittle fragmentation (Benz and Asphaug 1994, 1995) has become a leading technique for modeling meteoroid collisions into asteroids with realistic geologies and shapes (Asphaug et al., Icarus 1996; Nature 1998). Together with earlier techniques relying on the same Weibull-based Grady-Kipp fracture model (e.g. Melosh et al. 1992), it has been used to establish that asteroids larger than a few hundred meters diameter are rubble piles (Benz and Asphaug, Icarus 1999), and is applied for learning how binary asteroids form during tidal events and collisions (Michel et al., Science 2001) and how craters and regolith form on irregular, rotating bodies. But all of these applications, especially when the outcome involves a consideration of mechanical strength, rely upon the assumption that flaws are distributed according to a Weibull distribution throughout a rock mass, and that those flaws are activated dynamically and relieve local stress in a circumscribing volume. Our SPH fragmentation code has been calibrated against a variety of laboratory impact experiments, but never for a suite of experiments spanning size scale and energy scale. It would be prudent, before relying upon model predictions for km-scale rock masses, to benchmark our code against laboratory experiments, in particular the controlled set of laboratory experiments of Housen and Holsapple (Icarus 1999) designed to examine the dependence of a body's strength on its size. On our new computers we are running suites of numerical simulations to reproduce these experiments in which our only varied parameters are the laboratory impact conditions themselves: projectile and target diameter, for identical rock types (granite and basalt).

Affiliated with

Also associated with

No associations

Rating

Rock-Mechanical Constraints on SPH Applications to Asteroid Impact Evolution 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 Rock-Mechanical Constraints on SPH Applications to Asteroid Impact Evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rock-Mechanical Constraints on SPH Applications to Asteroid Impact Evolution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1892316