The Nonlinear Viscoelastic Response of Resin Matrix Composite Laminates.

Abstract

A review of possible treatments of nonlinear viscoelastic behavior of materials is presented. A thermodynamic based approach, developed by Schapery is discussed in detail and is used as the means to interpret the nonlinear viscoelastic response of a graphite epoxy laminate, T300/934. Test data to verify the analysis for Fiberite 934 neat resin as well as transverse and shear properties of the unidirectional T300/934 composited are presented. Long time creep characteristics as a function of stress level and temperature are generated. Favorable comparisons between the traditional, graphical and the current analytical approaches are shown. A free energy based rupture criterion is proposed as a way to estimate the life that remains in a structure at any time. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1984
Accession Number
ADA305123

Entities

People

  • A. H. Cardon
  • C. Heil
  • H. F. Brinson

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Carbon Fibers
  • Composite Materials
  • Creep
  • Glass Transition Temperature
  • Laminates
  • Material Degradation Processes
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Micromechanics
  • Reinforced Plastics
  • Strain Gages
  • Stress Strain Relations

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials