Quasi-Square Hole with Optimum Shape in an Infinite Plate Subjected to In-Plane Loading,

Abstract

This paper deals with the optimization of the shape of the corners and sides of a square hole, located in a large plate and subjected to in-plane loads, with the object of minimizing stress concentrations. Appreciable disagreement has been found between the results obtained previously by other investigators. In this paper new tests have been conducted and discrepancies have been corrected. Using an optimization technique, the authors have developed a quasi square shape which introduces a stress concentration of only 2.54 in a uniaxial field, the comparable value for the circular hole being 3. The efficiency factor of the proposed optimum shape is 0.90 whereas the efficiency factor of the best shape developed previously was 0.71. The shape also is developed that minimizes the stress concentration in the case of biaxial loading when the ratio of biaxiality is 1:-1. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1979
Accession Number
ADA064615

Entities

People

  • Augusto J. Durelli
  • K. Rajaiah

Organizations

  • Oakland University

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Axial Loads
  • Geometry
  • Insensitive Explosives
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanics
  • Military Research
  • Propellant Grains
  • Propellants
  • Solid Propellants
  • Stress Analysis
  • Stress Concentration
  • Stress Waves
  • Stresses
  • Two Dimensional

Readers

  • Structural Dynamics.