Open AccessDeceleration of projectiles in sand
Author(s) -
Stephan Bless,
William L. Cooper,
Keiko Watanabe,
Robert Peden
Publication year - 2012
Publication title -
aip conference proceedings
Language(s) - English
Resource type - Conference proceedings
eISSN - 1551-7616
pISSN - 0094-243X
DOI - 10.1063/1.3686217
Subject(s) - projectile , conical surface , penetration (warfare) , materials science , geotechnical engineering , penetration depth , mechanics , composite material , geology , optics , physics , engineering , metallurgy , operations research
Penetration of projectiles was measured for hemispherical and conical nose shapes penetrating granular media. Targets were beds of Ottawa sand and Eglin sand. Projectiles were rigid metals. Experimental parameters that were varied included velocity (from 300 to 600 m/s), nose shape, sand density, and scale (from 5 mm to 20 mm). Strong evidence for scale effects is found: 5 mm diameter projectiles are less effective penetrators than 12.5, 15, or 20 mm diameter penetrators.
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