Calculational investigation of impact cratering dynamics - Material motions during the crater growth periodThe considered investigation was conducted in connection with studies which are to provide a better understanding of the detailed dynamics of impact cratering processes. Such an understanding is vital for a comprehension of planetary surfaces. The investigation is the continuation of a study of impact dynamics in a uniform, nongeologic material at impact velocities achievable in laboratory-scale experiments conducted by Thomsen et al. (1979). A calculation of a 6 km/sec impact of a 0.3 g spherical 2024 aluminum projectile into low strength (50 kPa) homogeneous plasticene clay has been continued from 18 microseconds to past 600 microseconds. The cratering flow field, defined as the material flow field in the target beyond the transient cavity but well behind the outgoing shock wave, has been analyzed in detail to see how applicable the Maxwell Z-Model, developed from analysis of near-surface explosion cratering calculations, is to impact cratering
Document ID
19820038852
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Austin, M. G. (Physics International Corp. San Leandro, CA, United States)
Thomsen, J. M. (Physics International Corp. San Leandro, CA, United States)
Ruhl, S. F. (Physics International Co. San Leandro, CA, United States)
Orphal, D. L. (California Research and Technology, Inc. Livermore, CA, United States)
Schultz, P. H. (Lunar and Planetary Institute Houston, TX, United States)