Structural Composite Penetration Model Development.

Abstract

The smoothed particle hydrodynamics (SPH) technique in conjunction with the macromechanics concept for fiber composites was developed to simulate impact penetration of composite structures. To describe the material behavior under high intensity loadings, a three dimensional anisotropic plasticity model, an equation of state, and a failure criterion for unidirectional composites were proposed. Furthermore, to maintain material frame indifference of the constitutive equations, the polar stress rate approach was employed in the stress and strain transformation under large rotation. The above physics were incorporated into SPH. Detailed penetration process and damage progression were simulated with graphite/epoxy composite laminates impacted by a steel projectile. The predicted impact response and damage patterns agree well qualitatively with the experimental results. This study has demonstrated that SPH can be a robust and viable analytical tool for predicting response of fiber reinforced composite structures subjected to high velocity impact.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1996
Accession Number
ADA319784

Entities

People

  • Firooz A. Allahdadi
  • Jinn-kuen Chen

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Composite Structures
  • Computational Science
  • Coordinate Systems
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Finite Element Analysis
  • Hydrostatic Pressure
  • Laminates
  • Materials Laboratories
  • Mechanics
  • Micromechanics
  • Modulus Of Elasticity
  • Numerical Analysis
  • Stress Strain Relations
  • Three Dimensional

Fields of Study

  • Materials science

Readers

  • Computational Fluid Dynamics (CFD)
  • Structural Health Monitoring of Composite Structures.