Comparison of Penetration Codes for Strain Measurements in Kinetic Energy Penetrators
Abstract
A two-dimensional finite-difference Eulerian hydrocode (HELP) and a two-dimensional finite-element Lagrangian code (EPIC-2) were used to measure response characteristics of a long steel rod with a hemispherical nose impacting a rolled homogeneous armor target at 0 deg obliquity and at an ordnance velocity. Surface strains were computed at three positions along the steel rod and these results were compared with published experimental data wherein the measuring devices were strain gages mounted on a long rod at prescribed locations in a forward ballistic testing set up. Computational results from both codes have shown excellent agreement with the experimental data during the elastic phase of the deformation. However with the onset of plastic deformation agreement was dependent on the failure criteria incorporated in the codes. With the inclusion of failure models in the codes very good agreement was obtained in the eroding finite element model while the finite-difference code agreement deteriorated significantly at later times.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1980
- Accession Number
- ADA084391
Entities
People
- A. D. Gupta
- J. D. Wortman
- J. J. Misey
Organizations
- Ballistic Research Laboratory