Pressure versus drag effects on crater size

Details Pressure versus drag effects on crater size Pressure versus drag effects on crater size

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1253s&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1253-1254 (SEE N94-20636 05-91

Computer Science

Aerodynamic Drag, Atmospheric Effects, Atmospheric Pressure, Craters, Pressure Effects, Projectile Cratering, Ejecta, Impact Damage, Impact Tests

Scientific paper

The topic of atmospheric effects on crater formation is very complex because it includes not only pressure effects on excavation, but also drag effects on ejecta placement. Experiments have to be designed very carefully to allow isolation of the two phenomena. Historically, numerous investigators have shown an influence of atmospheric pressure. However, none have identified the scaling that correctly isolates pressure from drag effects. On-going work in explosive cratering has produced scaling paradigms for deeply buried explosive charges where drag effects are negligible. Here it was found that increased pressure caused significant induced strength effects that impeded crater excavation. The effect is more pronounced with increasing burial depth and less pronounced with increased yield.

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