A Numerical Analysis of the Effect of Mesh Sensitivity on Ballistic Limit Prediction,

Abstract

This memorandum presents a study to examine the effect of the mesh density on the ballistic limit determination of a 1.08-cm thick 6061-T6 aluminium plate struck by a 5.56-mm SSlO9 bullet. The ballistic limits of the target plate were obtained for three different mesh densities. The results showed that an optimised finite element mesh in the impact region would yield consistent penetration results. It was also shown that as the number of elements is increased, the CPU run time increases significantly but with little gain in the accuracy of the ballistic limit. On the other hand, if the number of elements is decreased below the optimised mesh density, the CPU time could increase significantly and errors in the accuracy of the predicted ballistic limit could be large due to hourglassing and severe mesh distortion.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1998
Accession Number
ADA358257

Entities

People

  • D. Nandlall
  • G. Wong

Organizations

  • Department of National Defence

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Aluminum
  • British Columbia
  • Civil Engineering
  • Classification
  • Curve Fitting
  • Distortion
  • Elements
  • Engineering
  • Equations
  • Errors
  • National Security
  • Numerical Analysis
  • Security
  • Sensitivity
  • Simulations

Readers

  • Computational Modeling and Simulation
  • Explosive Engineering.
  • Structural Dynamics.