Design, Fabrication and Test of Multi-Fiber Laminates.

Abstract

The objective of the program is to design, fabricate, and test unidirectional and angleply multi-fiber laminates for improved impact strength and other mechanical properties. The effects of several variables on the mechanical properties of epoxy matrix materials are described. These include fiber type (HMS and AS graphites, glass, and Kevlar 49), ratio of primary to hybridizing fiber and hybrid configuration. It is demonstrated that AS graphite/S-glass in an intraply configuration results in the best combination of static and Charpy impact properties as well as superior ballistic impact resistance. Pendulum impact tests which were conducted on thin specimens are shown to produce different ranking of materials than tests conducted on standard thickness Charpy specimens, and it is shown that the thin specimen results are in better agreement with the ballistic impact data. Additional static test data are reported as a function of temperature for the seven best hybrid configurations having epoxy, polyimide (PMR-15) and polyphenylquinoxaline resins as the matrix.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1975
Accession Number
ADA307345

Entities

People

  • R. A. Pike
  • R. C. Novak

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Biocomposites
  • Composite Materials
  • Epoxy Composites
  • Epoxy Laminates
  • Failure Mode And Effect Analysis
  • Flexural Properties
  • Flexural Strength
  • Graphitic Materials
  • Laminates
  • Materials Laboratories
  • Materials Processing
  • Materials Testing
  • Mechanical Properties
  • Mechanical Working
  • Reinforced Plastics
  • Tensile Strength
  • Turbines

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials