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Cavity and crater depth in hypervelocity impact

✍ Scribed by T. Kadono; A. Fujiwara

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
241 KB
Volume
31
Category
Article
ISSN
0734-743X

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✦ Synopsis

We discuss the depth of cavities and craters caused by hypervelocity impacts as a function of impact parameters such as impact velocity, projectile and target densities, and projectile diameter, in two extreme cases: the penetration of intact projectiles at low impact pressure and the hemispherical excavation at very high impact pressure. The relations between the depth and the impact parameters are obtained. Then, previous experimental results are compiled; crater depth normalized by projectile diameter and the ratio of projectile and target densities is plotted for glass, plastic, and metal projectiles and metal, rock, ice, foam, sheet-stack, and aerogel targets. The trends of the data are consistent with the relations in the extreme cases.

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