Design Equations for Tripping of Stiffeners Under Inplane and Lateral Loads

Abstract

A series of design oriented equations to predict the tripping (lateral-torsional instability) of stiffeners under inplane and lateral loads has been developed which will allow this mode of failure to be more comprehensively addressed in the early stages of structural design. This type of failure is characterized by a twisting of the stiffener about its line of attachment to the plating and has been demonstrated by some recent British grillage tests to have serious potential as a primary mode of failure. The solutions developed take into account the effects of the rotational resistance provided by the plating to which the stiffener is attached, non-linear material and structural behavior by means of a tangent modulus type approach, and stiffener web deformations (for inplane loading). The equations are suitable for manual calculations but particularly powerful applications are possible when they are teamed up with a desk-top type mini-computer.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1979
Accession Number
ADA074752

Entities

People

  • John C. Adamchak

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Agreements
  • Attachment
  • Computers
  • Equations
  • Experimental Data
  • Fabrication
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Geometry
  • Lepidoptera
  • Materials
  • Moment Of Inertia
  • Numerical Analysis
  • Potential Energy
  • Quadratic Equations
  • Resistance
  • Shape

Readers

  • Computational Modeling and Simulation
  • Structural Dynamics.