Characterizing Thermal/Mechanical Properties of Filament Wound Composites.

Abstract

The characterization of composites is a continuing process involving a wide variety of materials with different compositions, laminate geometries and fabrication processes. This thesis examines bench test methods for the determination of the linear coefficients of thermal expansion, residual stresses due to fabrication, and delamination strengths in S2-Glass/Epoxy and AS4 Graphite/Epoxy filament wound cylinders. Results from these tests are compared to finite element and closed form solutions. Test theory correlation is generally good. The slopes of temperature-strain curves are closely approximated by the linear coefficient of thermal expansion calculated for the laminates. Predicted values of residual stress are approximately equal to those determined by a simple bench test. Measured delamanation strengths were found to be considerably lower (35%) than other published data. Keywords: Expansion coefficients; Filament wound construction; ANSYS finite element program; Mechanical properties; Computer programs. (Theses)

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Document Details

Document Type
Technical Report
Publication Date
Jan 15, 1987
Accession Number
ADA176238

Entities

People

  • Bruce K. Fink

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Fabrication
  • Filaments
  • Geometry
  • Graphitic Materials
  • High Temperature
  • Laminates
  • Low Temperature
  • Materials Processing
  • Materials Testing
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Shear Stresses
  • Test Methods
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.