Simulations of Ballistic Impact Situations Involving Deep Penetration and Perforation of Targets with a Lagrangian Impact Code,
Abstract
A major enhancement to the capabilities of EPIC-2, a Lagrangian finite element impact code, has been developed and implemented enabling the modeling of deep penetration and/or perforation of targets. This paper presents the techniques which were developed to handle dynamic relocation of sliding surfaces and the automatic addition of new sliding surfaces. These techniques were first applied to the modeling of axisymmetric ballistic impact situations involving kinetic energy penetrators versus targets which fail by plugging due to high strains. The criteria which were required for target failure to begin and proceed 'naturally', ultimately resulting in perforation when warranted, are discussed. A parametric study is presented of a steel cylinder versus a pure titanium target at normal obliquity. Only the striking velocity and the critical level of equivalent strain necessary to mandate failure were varied. The results are demonstrated to be consistent between calculations; further-more, no rezoning or manual intervention was involved in any of the calculations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADP000005
Entities
People
- Barbara E. Ringers
Organizations
- Ballistic Research Laboratory