Deceleration of Projectiles in Sand

Abstract

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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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA570168

Entities

People

  • Keiko Watanabe
  • Robert Peden
  • Stephan Bless
  • William Cooper

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Aspect Ratio
  • Coefficients
  • Deceleration
  • Diameters
  • Equations
  • Grain Size
  • Information Operations
  • Kinetic Energy
  • Mathematics
  • Measurement
  • Military Research
  • New York
  • Projectiles
  • Subatomic Particles
  • Tungsten Alloys

Readers

  • Aerodynamics/Aeronautics.
  • Geotechnical Engineering.
  • Munitions and Ordnance Engineering