Buckling and Failure Characteristics of Graphite-Polyimide Shear Panels.

Abstract

The buckling and failure characteristics of unstiffened, blade-stiffened, and hat-stiffened graphite-polyimide shear panels are described. The picture frame shear test is used to obtain shear stress-strain data at room temperature and at 316 deg c. The experimental results are compared with a linear buckling analysis, and the specimen failure modes are described. The effect of the 316 deg C test temperature on panel behavior is discussed. Significant postbuckling shear strength was observed for the unstiffened specimens. For all specimens, failure was caused by either a fixture-induced instability or by the stiffeners debonding from the skin. (MM)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1983
Accession Number
ADA302708

Entities

People

  • Jane A. Hagaman
  • Mark J. Shuart

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Coefficients
  • Composite Materials
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Graphite Epoxy Composites
  • Graphitic Materials
  • Heat Transfer
  • Materials
  • Materials Processing
  • Materials Testing
  • Mechanics
  • Shear Strength
  • Shear Stresses
  • Shear Tests
  • Stresses
  • Temperature Gradients
  • Thermal Stresses

Fields of Study

  • Physics

Readers

  • Structural Health Monitoring of Composite Structures.