An Equation for Predicting the Residual Static Strength of Stiffened Panels

Abstract

An equation has been developed to predict the residual static strength of stiffened panels. All parameters in the equation can be evaluated from tests on simple unstiffened specimens. The stiffened panel is treated as a composite material, with the sheet material representing the matrix and the stiffeners representing the fibers. The residual static strength of the cracked sheet, calculated using notch strength analysis, and the proportional limit of the stiffeners are used in the law-of-mixtures equation to calculate the residual static strength of the stiffened panels. Excellent predictions of the residual static strength of stiffened panels have been obtained and are presented for a wide variety of panel configurations, type fasteners, and crack geometry.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0872158

Entities

People

  • I. E. Figge Sr.

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Army Aviation
  • Composite Materials
  • Experimental Data
  • Fail Safe
  • Fasteners
  • Fracture (Mechanics)
  • Geometry
  • Government (Foreign)
  • Governments
  • Literature Surveys
  • Materials
  • Materials Science
  • Mechanics
  • Stiffening
  • Tensile Strength

Fields of Study

  • Physics

Readers

  • Reinforced Composite Materials
  • Structural Dynamics.