Physics – Geophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..399c&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 399-401 (SEE N87-23341 16-91)
Physics
Geophysics
Asteroids, Gravitational Effects, Impact Strength, Natural Satellites, Planetary Surfaces, Projectile Cratering, Algorithms, Collisions, Compression Loads, Pressure Dependence, Scaling Laws
Scientific paper
A new model for scaling the outcome of catastrophic collisions from laboratory scale experiments was developed and applied to large bodies where gravitational binding is dominant. This algorithm includes a pressure dependent impact strength which predicts that large asteroids behave as intrinsically strong objects due to compressive loading of overburden throughout their interiors. For small bodies, where the gravitational loading is negligible, this model assumes that the impact strength is independent of size. There was considerable discussion of scaling laws for disruption when these results were presented to one authors colleagues. The pressure strengthening impact strength model was viewed as physically quite plausible; however, it was argued that the impact strength should decrease with increasing size in the size range where gravitational compression is negligible.
Chapman Clark R.
Davis Donald R.
Weidenschilling Stuart J.
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