On the Utility of Plane Strain Approximations for Oblique Impact Computations
Abstract
A study was made to determine the feasibility of using the plane strain mode of a 2D code in lieu of a 3D code for this oblique kinetic energy penetration problem. First, a comparison in a normal impact problem was made between the axisymmetric and the plane strain modes of the two dimensional HELP code. A volumetric relationship was given for the kinetic energy and the axial momentum of the projectile, but data scaling for other variables of the projectile and those of the target were not determined. Next, HELP in the plane strain mode was utilized to solve a long rod impact at 60 deg obliquity and the results were compared with experimental data obtained at Los Alamos Scientific Laboratory. Finally, the oblique impact problem was also modeled with a three dimensional version of the EPIC code. A comparison of rod loss penetration depth, and penetrator and target profiles revealed very good agreement at early times when the penetrator density was greater than that of the target.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1979
- Accession Number
- ADA081120
Entities
People
- G. H. Jonas
- J. A. Zukas
- J. J. Misey
Organizations
- Ballistic Research Laboratory