Determination of Physical and Structural Properties of Mixed-Modulus Composite Materials

Abstract

The objective of this program was to determine the physical and structuralproperties of mixed-modulus composite materials using combinations of graphiteand S-glass fibers with epoxy resin under static and fatigue loading conditions.The data obtained for solid laminates, tubular specimens and sandwich beamsin which the S-glass material was oriented parallel to the longitudinal axisof the specimens and the graphite fibers were oriented at plus or minus 45^to the same axis, are reported. Stress-strain and S-N CURVES ARE COMPARED TOAPPROPRIATE DATA ON PURE S-glass and pure graphite material where such datacontributes to an understanding of the mixed materials performance. The dataindicates that the mixed-modulus system is compatible with the structural andfailure mode requirements of helicopter rotor blades.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1971
Accession Number
AD0732489

Entities

People

  • Richard B. Freeman
  • Robert L. Pinckney

Organizations

  • Boeing Rotorcraft Systems

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Fabrication
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Glass Fibers
  • Graphitic Materials
  • Laminated Glass
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Testing
  • Shear Stresses
  • Shear Tests
  • Stress Strain Relations
  • Tensile Stress

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Military Engineering.
  • Reinforced Composite Materials