Fracture Mechanics of Delamination. Initiation and Growth.

Abstract

This report describes the results from an experimental and analytical study on the fracture mechanics of delamination. Experiments have been conducted using the AS-3501-06 graphite-epoxy laminates in order to observe delamination growth of various geometrical and loading conditions. Static and fatigue crack growth under both tension and compressive loads are studied. The experiments helped to identify and isolate the most important loading, geometry and material parameters which influence the delamination processes. Predictive models are then developed to model these processes, based on the linear elastic fracture mechanics concept of energy release rate. The models are executed by a finite element routine which simulates the crack growth process. Extension of the energy method to the growth process under constant amplitude fatigue loads leads to the concept of constant damage states. This concept is readily applied in a cumulative damage model for fatigue under spectrum loading. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1982
Accession Number
ADA115728

Entities

People

  • A. S. D. Wang
  • M. Slomiana

Organizations

  • Drexel University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Composite Material Fabrication
  • Composite Materials
  • Epoxy Laminates
  • Failure Mode And Effect Analysis
  • Fracture (Mechanics)
  • Laminates
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Working
  • Mechanics
  • Micromechanics
  • Prosthetics
  • Tensile Strength
  • Three Dimensional
  • Two Dimensional

Readers

  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).