Predictions of Projectile Penetration Phenomena and Comparison with Experiments in a Soil Medium.
Abstract
Results of calculations are presented to predict effects of earth penetration experiments conducted in mid-July 1974 at the Watching Hill site of the Defense Research Establishment, Alberta. Calculations were perfored with the TOODY Lagrangian code for both a rigid and deformable projectile. Soil cap models describing four layers of the glacial silt target were employed in the calculations. All calculations are for a projectile 0.1651 m in diameter (6.5 in.), of mass 181.44 kg (400 lbs.) with tangent ogive nose shape impacting the earth target at a velocity of 152.4 m/s (500 ft/sec). A zero friction boundary condition is employed at the projectile-soil interface. Stress, strain, and velocity distributions, produced in the medium by the penetrating projectile, are computed. Axial retarding forces exerted by the medium on the projectile and normal stress distributions on the projectile surface are also calculated. Comparisons of predictions with experimental measurements of rigid body projectile deceleration and soil stress histories indicate that computer simulations should be able to provide a detailed and reasonably accurate description of soil response and projectile motion during penetration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 08, 1975
- Accession Number
- ADA020179
Entities
People
- A. J. Chabai
- R. K. Byers
- R. T. Walsh
Organizations
- Sandia National Laboratories