Accession Number:

ADA043281

Title:

EPIC-3, a Computer Program for Elastic-Plastic Impact Calculations in 3 Dimensions

Descriptive Note:

Final rept. Jan 1976-Feb 1977

Corporate Author:

HONEYWELL INC MINNETONKA MN DEFENSE SYSTEMS GROUP

Personal Author(s):

• Johnson, Gordon R.

Report Date:

1977-07-01

Pagination or Media Count:

94.0

Abstract:

A three-dimensional computer program for high-velocity impact problems is described. The numerical technique is based on a Lagrangian finite- element formulation in which the equations of motion are integrated directly rather than through the traditional stiffness matrix approach. Tetrahedron elements are formulated for large strains and displacements, and nonlinear material strength and compressibility effects are included to account for elastic-plastic flow and wave propagation. A sliding surfaces capability is also included.

Descriptors:

• *COMPUTER PROGRAMS
• EQUATIONS OF MOTION
• FINITE ELEMENT ANALYSIS
• HYDRODYNAMICS
• IMPACT
• MACHINE CODING
• NODES
• PENETRATION
• PLASTIC FLOW
• STRAIN HARDENING
• STRESS STRAIN RELATIONS
• THREE DIMENSIONAL
• VELOCITY
• WAVE PROPAGATION

Subject Categories:

• Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE