Accession Number:

ADP000005

Title:

Simulations of Ballistic Impact Situations Involving Deep Penetration and Perforation of Targets with a Lagrangian Impact Code,

Descriptive Note:

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1982-09-01

Pagination or Media Count:

14.0

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 andor 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

Subject Categories:

  • Metallurgy and Metallography
  • Numerical Mathematics
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE