Mathematics – Logic
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..631i&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 631.
Mathematics
Logic
2
Craters, Hypervelocity Impact, Gravitational Collapse, Rock Mechanics, Scaling Laws
Scientific paper
Previous investigations of the impact crater formation mechanics have shown that the late stage, a transient cavity collapse in a gravity field, may be modeled with a traditional rock mechanics if one ascribes very specific mechanical properties of rock in the vicinity of a crater: an effective strength of rock needed is around 30 bar, and effective angle of internal friction below 5 deg. The rock media with such properties may be supposed 'temporary fluidized'. The nature of this fluidization is now poorly understood; an acoustic (vibration) nature of this fluidization has been suggested. This model now seems to be the best approach to the problem. The open question is how to implement the model (or other possible models) in a hydrocode for numerical simulation of a dynamic crater collapse. We study more relevant models of mechanical behavior of rocks during cratering. The specific of rock deformation is that the rock media deforms not as a plastic metal-like continuum, but as a system of discrete rock blocks. The deep drilling of impact craters revealed the system of rock blocks of 50 m to 200 m in size. We used the model of these block oscillations to formulate the appropriate rheological law for the subcrater flow during the modification stage.
Ivanov Boris A.
Kostuchenko V. N.
No associations
LandOfFree
Block oscillation model for impact crater collapse 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 Block oscillation model for impact crater collapse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Block oscillation model for impact crater collapse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-872280