Finite Element Models for Predicting Crack Growth Characteristics in Composite Materials,

Abstract

Two dimensional and quasi-three dimensional, linear elastic finite element models for the prediction of crack growth characteristics, including crack growth direction, in laminated composite materials are presented. Mixed-mode crack growth in isotropic materials, unidirectional and laminated composites is considered. The modified crack closure method is used to predict the applied load level for crack extension and two new failure theories, modifications of the point stress and the Hashin failure criteria, are proposed to predict the direction of crack extension in composites. Comparisons are made with the Tsai-Wu failure criterion and the Sih strain energy density criterion as well as with experimental results. It is shown that the modified versions of point stress and Hashin criteria compare well with experiment. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1982
Accession Number
ADA305652

Entities

People

  • Carl T. Herakovich
  • Matthew B. Buczek

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Continuum Mechanics
  • Coordinate Systems
  • Crack Tips
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Laminates
  • Materials
  • Materials Processing
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.