An Orthotropic Model for Composite Materials in EPIC

Abstract

Orthotropic plasticity and failure were added to the existing orthotropic elasticity model in EPIC for the purpose of modeling impact loading of composites. Plasticity is represented by the Hill yield function with an associated flow rule, and failure is indicated when any component of the plastic natural-strain tensor exceeds its critical value. Example computations are included to demonstrate the model and its applicability to composites under ballistic impacts.

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Document Details

Document Type
Technical Report
Publication Date
Jun 06, 2014
Accession Number
ADA608146

Entities

People

  • Stephen R. Beissel

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Computational Fluid Dynamics
  • Computations
  • Differential Equations
  • Elastic Properties
  • Equations
  • Equations Of Motion
  • Fiber Reinforced Polymers
  • Glass Fibers
  • Materials
  • Mechanical Properties
  • Mechanics
  • Plastic Properties
  • Polymer Matrix Composites
  • Stress Strain Relations
  • Stresses
  • Yield Strength

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Military History of the United States in the 20th Century.
  • Reinforced Composite Materials