Stress Analysis and Buckling of J-Stiffened Graphite-Epoxy Panel.

Abstract

A graphite-epoxy shear panel with bonded-on J-stiffeners has been investigated. This panel was loaded to buckling in a picture frame shear test. Two finite element models, each of which included the doubler material bonded to the panel skin under the stiffeners and at the panel edges, were used to make a stress analysis of the panel. The shear load distributions in the panel from two commonly used boundary conditions, applied shear load and applied displacement, were compared with the results from one of the finite element models that included the picture frame test fixture. Analysis results show that use of the bonded doubler material under the stiffeners and at the panel edges in conjunction with the test fixture loading produces a highly nonuniform shear load dis analytical results were verified by comparison with strain and buckling results from the well-controlled laboratory test of the panel. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1980
Accession Number
ADA302349

Entities

People

  • Randall C. Davis

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautics
  • Aluminum
  • Boundaries
  • Buckling
  • Composite Materials
  • Data Acquisition
  • Displacement
  • Geometry
  • Graphitic Materials
  • Load Distribution
  • Materials
  • Shear Tests
  • Stiffness
  • Stress Analysis
  • Structural Analysis
  • Test Fixtures
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.