Multi-Fiber Composites.

Abstract

The objective of this program is to develop resin matrix composites having improved resistance to foreign object damage in gas turbine engine fan blade applications. Materials evaluated include epoxy matrix graphite/glass and boron/glass hybrids, thermoplastic matrix boron/glass hybrids, and superhybrids consisting of graphite/epoxy, boron/aluminum, and titanium alloy sheets. Static, pendulum impact, and ballistic impact test results are reported for all materials. Superhybrid blade-like specimens are shown to be capable of withstanding relatively severe ballistic impacts from gelatin spheres without fracture. The effects of ply configuration and projectile angle of incidence on impact behavior are described. NASTRAN predictions of surface strains during ballistic impact are presented and shown to be in reasonable agreement with experimental measurements. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1976
Accession Number
ADA305238

Entities

People

  • R. C. Novak

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Failure Mode And Effect Analysis
  • Impact Loads
  • Jet Propulsion
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Physics Laboratories
  • Shear Stresses
  • Tensile Strength
  • Turbines

Fields of Study

  • Materials science
  • Physics

Readers

  • Aerodynamics.
  • Reinforced Composite Materials
  • ballistics.