Characterization of Composite Laminates Using Tubular Specimens

Abstract

Properties of a unidirectional graphite/epoxy (T300/5208) composite are characterized using tubular specimens. The elastic compliances based on the average invariants are found to describe fairly accurately the elastic behavior under various combined loadings. The equality between the tension and compression compliances and the symmetry of the compliance tensor are also established to within the experimental scatter. The matrix/interface-controlled failure is characterized by a second-order polynomial including a first-order term. This failure criterion agrees with the experimental observation that the compressive loading perpendicular to the fibers can increase the longitudinal shear stress required for failure. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1977
Accession Number
ADA051646

Entities

People

  • H. T. Hahn
  • J. Erikson

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Air Force
  • Composite Materials
  • Coordinate Systems
  • Elastic Properties
  • Epoxy Composites
  • Equations
  • Failure Mode And Effect Analysis
  • Graphitic Materials
  • Laminates
  • Least Squares Method
  • Materials
  • Materials Laboratories
  • Mechanics
  • Plastic Explosives
  • Security
  • Shear Stresses

Readers

  • Regression Analysis.
  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.