Numerical Resolution Calculation for Elastic-Plastic Impact Problems

Abstract

This paper is a brief summary of an investigation using the finite element method in the study of wave propagation and impact problems in solid materials. Guidelines are provided for the determination of the computational grid and the shape and size of the elements. Two examples are presented to show effects of mesh refinements on solution accuracy. Problems concerning the effects of artificial viscosity, as well as pressure and strain changes in the orientation of the grid, are presented. This study was performed with EPIC-2, a computer code for elastic-plastic impact calculations in two dimensions. EPIC-2 makes use of triangular elements in several configurations. The results presented herein should serve as a guide to proper selection of mesh size and orientation for accurate representation of physical problems.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1984
Accession Number
ADA152292

Entities

People

  • Bertina M. Creighton

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aspect Ratio
  • Commerce
  • Computers
  • Corporations
  • Elastic Waves
  • Engineering
  • Frequency
  • Jet Propulsion
  • Materials
  • Mechanics
  • Military Research
  • Orientation (Direction)
  • Shape
  • Shock
  • Simulations
  • Wave Equations
  • Wave Propagation

Readers

  • Computational Fluid Dynamics (CFD)
  • Structural Health Monitoring of Composite Structures.
  • Systems Analysis and Design