Impact cratering - The effect of crustal strength and planetary gravity

Details Impact cratering - The effect of crustal strength and planetary gravity Impact cratering - The effect of crustal strength and planetary gravity

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rvgsp..19....1o&link_type=abstract

Reviews of Geophysics and Space Physics, vol. 19, Feb. 1981, p. 1-12.

Physics

Space Physics

12

Meteorite Craters, Planetary Craters, Planetary Crusts, Planetary Gravitation, Planetary Surfaces, Projectile Cratering, Flow Distribution, Hypervelocity Impact, Incompressible Flow, Mathematical Models, Yield Strength, Planets, Impacts, Cratering, Crust, Gravitational Effects, Flows, Data, Mathematical Models, Volume, Energy, Stress, Partitioning, Formation, Comparisons, Experiments, Depth, Meteorites, Acceleration, Shock Waves, Density, Yield Strength, Radius, Diagrams, Review

Scientific paper

The effect of varying planetary crustal strength and surface gravity on the depth of impact craters is investigated, by coupling the results of compressible flow, finite difference calculations carried out to stress levels below the compressional dynamic yield point, in keeping with the incompressible fluid flow model of Maxwell (1973). The fundamental assumption in this description is that the amplitude of the particle velocity field decreases with time as kinetic energy is converted into heat and gravitational potential energy. By using a Mohr-Coulomb yield criterion, the effect of varying strength on transient crater depth and on crater formation time in the gravity field of the moon is investigated for the case of 5 km/sec impactors having radii in the 10 to 10 to the 7th cm range.

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