THE EFFECT OF RESIN CONTENT AND VOIDS ON THE STRENGTH OF FIBERGLASS- REINFORCED PLASTICS FOR AIRFRAME USE

Abstract

As a further step toward the acceptance of fiber glass reinforced plastics (FRP) in primary aircraft structure, the effects of resin content on laminate strength properties were investigated in depth. Functional relationships were obtained and methods of controlling resin content were compared. Uniformity in strength and resin content was observed from the point of view of replication and within-laminate conditions. Most of the data were for laminates of EPON 828-Z epoxy resin reinforced with the 181 style fiberglass fabric; however, limited data were obtained for the 120 and 909 (S-920) fabrics. In addition, a preliminary study was made of the effects of voids in the cured laminates. A critical size was observed for large artificial voids, and the microvoid content of the pre-preg was minimized by modification of a previously developed multi-ply coating machine. Non-destructive methods of testing for voids were also reviewed.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1965
Accession Number
AD0627362

Entities

People

  • Charles W. Bert
  • Gene M. Nordby
  • W. C. Crisman

Organizations

  • University of Oklahoma

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Army Aviation
  • Composite Materials
  • Epoxy Resins
  • Fabrication
  • Fiberglass
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Plastics
  • Reinforced Plastics
  • Resins

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials
  • Systems Analysis and Design