On the fragmentation of asteroids and planetary satellites

Details On the fragmentation of asteroids and planetary satellites On the fragmentation of asteroids and planetary satellites

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...84..226h&link_type=abstract

Icarus (ISSN 0019-1035), vol. 84, March 1990, p. 226-253.

Physics

156

Asteroids, Collision Rates, Natural Satellites, Planetary Structure, Scale Models, Fragmentation, Hypervelocity Impact, Planetary Evolution, Planets, Satellites, Asteroids, Fragmentation, Theoretical Studies, Collisions, Models, Scaling, Parameters, Energy, Size, Timescale, Kinetics, Velocity, Experimental Studies, Diagrams, Calculations, Mass, Strength, Gravity Effects

Scientific paper

A general scaling model is defined which allows the extrapolation of small-scale collisional fragmentation experiment results, and existing collisional theories are considered within its framework. Scaling based exclusively upon the specific energy, Q, of the event (the ratio of projectile kinetic energy to the mass of the target body) is shown to hold when (1) the projectile and target material properties do not depend on size or time scales, and (2) the collision is governed by kinetic energy independently of impact velocity. Because neither of these conditions should hold, serious doubt is cast on the validity of Q's use as the sole scaling parameter.

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