Representation of Matrix/Interface-Controlled Strength of Unidirectional Composites.

Abstract

The report presents a method of characterizing the matrix/interface-controlled strength, including scatter, of unidirectional composites under combined loading. The failure envelope is represented by a second order polynomial and the scatter is described by the strength vector whose magnitude has a Weibull distriubtion. The method is based on the assumption of failure originating at inherent cracks parallel to the fibers and holds promise as a means of accounting for the size effect under combined loading. In addition, the energy release rate approach is discussed as a physical model and the appropriate data are presented. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1978
Accession Number
ADA063796

Entities

People

  • H. Thomas Hahn
  • J. Erikson

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Air Force
  • Air Force Facilities
  • Composite Materials
  • Elastic Properties
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Testing
  • Mechanics
  • Shear Modulus
  • Shear Strength
  • Shear Stresses
  • Test Methods
  • Three Dimensional

Readers

  • Approximation Theory.
  • Structural Health Monitoring of Composite Structures.