AN INVESTIGATION OF THE FATIGUE AND CREEP PROPERTIES OF GLASS REINFORCED PLASTICS FOR PRIMARY AIRCRAFT STRUCTURES

Abstract

Fatigue of glass reinforced epoxy composite materials is examined from several points of view. High cycle and low cycle fatigue and the effects of frequency, moisture, and state of stress on the fatigue life are included. The effects of creep and strain rate are also studied with a view toward their effect on fatigue life. Cumulative fatigue damage studies include nondestructive ultrasonic techniques applied to damage levels and application of phenomological theory to the results of two stress level testing. Appendices accompanying the report include (1) a survey of GRP fatigue literature, and (2) a survey of existing cumulative fatigue damage theories with potential application to GRP. Two types of reinforcement were used, uniaxial roving and glass cloth.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1967
Accession Number
AD0652415

Entities

People

  • E. M. Olsen
  • K. E. Hofer Jr.

Organizations

  • IIT Research Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Creep
  • Fatigue Tests (Mechanics)
  • Glass Fibers
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Reinforced Plastics
  • Test And Evaluation

Readers

  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.
  • Theoretical Analysis.