A RAPID METHOD FOR ESTIMATING THE GREATEST STRESS IN A STRUCTURE SUBJECT TO CREEP,

Abstract

Several simple structures made of material in which the creep strain rate is proportional to the nth power of stress are studied with a view to determining the way in which the greatest stress in a structure varies with the exponent n when the geometry of the structure and the load carried by the structure remain unchanged. From a study of the results a simple empirical linear rule for interpolating for greatest stress between the specially simple cases n equals 1 and n approaches infinity (which correspond to exact analogs of linear elastic and perfectly plastic material respectively) is devised. The rule tends to be more conservative as n increases. The interpolation rule may be improved if a special linear-elastic thermal stress problem is solved. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1963
Accession Number
AD0429287

Entities

People

  • C. R. Calladine

Organizations

  • Brown University

Tags

DTIC Thesaurus Topics

  • Creep
  • Geometry
  • Interpolation
  • Materials
  • Mechanical Properties
  • Strain Rate
  • Stresses
  • Thermal Stresses

Fields of Study

  • Mathematics

Readers

  • Approximation Theory.
  • Mechanical Engineering/Mechanics of Materials.