Strength of Short Fiber Reinforced Composites

Abstract

The structural utility of short glass fiber reinforced composites is experimentally investigated for fiber volume fractions from 0.15 to 0.5. The strength and stiffness of systems with randomly oriented fibers are compared with those of similar composites with aligned fibers. The ultimate strength of both types of material increases in a reasonably linear fashion with volume fraction. For all volume fractions, strength of the random composites is slightly higher than the longitudinal and much higher than the transverse strength of equivalent composites with aligned fibers. The modulus of the random system is approximately two-thirds the longitudinal and twice the transverse modulus of the unidirectional material. The structural utility of the flow molded material is greatest in uniaxial, stiffness critical situations. The greater strength and planar isotropy of the random composites make them preferable in all strength limited or multiaxial applications.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1971
Accession Number
AD0883617

Entities

People

  • R. E. Lavengood

Organizations

  • Monsanto

Tags

DTIC Thesaurus Topics

  • Composite Materials
  • Contracts
  • Elastic Properties
  • Experimental Data
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Glass Fibers
  • Materials
  • Mechanical Properties
  • Orientation (Direction)
  • Stiffness
  • Stress Strain Relations
  • Stresses
  • Tensile Modulus
  • Tensile Strain
  • Tensile Strength
  • Test And Evaluation

Fields of Study

  • Materials science

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Structural Health Monitoring of Composite Structures.