Interfacial Mobility and Its Effect on Flexural Strength and Fracture Toughness in Glass-Fiber Fabric Reinforced Epoxy Laminates.

Abstract

Constant-strain-rate mechanical testing was used, to study the fracture mechanical characterization of E-glass fiber fabric reinforced epoxy composites. Testing was performed ) as a function of the silane coupling agent used with compact tension (CT) specimens for racture toughness and rectangular specimens for flexural strength. Two silane coupling agents, y-aminopropyltriethoxysilane (APS) and y-aminobutyltrithoxy-silane (ABS) were used for this purpose. The fracture toughness,K1c, of ABS treated composites was shown to be lower than that for APS treated composites. Treatment with either is better than using bare glass. A three point bend test showed the flexural strength and modulus were increased in order of untreated<ABS<APS treated composites in both dry and wet conditions. Since these silanes have similar chemistry, we believe that the difference is due to the interfacial mobility of the coupling agent layer.

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Document Details

Document Type
Technical Report
Publication Date
Nov 21, 1994
Accession Number
ADA288344

Entities

People

  • Frank D. Blum
  • Timothy W. Wang

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Composite Materials
  • Couplings
  • Epoxy Composites
  • Fibers
  • Flexural Strength
  • Glass Fibers
  • Inorganic Materials
  • Laminates
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Physical Properties
  • Stresses
  • Surface Properties
  • Toughness

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials
  • Surface Coatings Technology.