SIMILARITY BETWEEN CREEP RUPTURE IN VISCOELASTIC SOLIDS AND FATIGUE IN METALS.

Abstract

A local energy criterion of Irwin's type is applied to a problem of a quasi static extension of a crack embedded in an elastic-plastic or visco-elastic-plastic matrix. The creep rupture under sustained loads and fatigue crack propagation, both described by the above equation, are shown to follow almost identical mathematical representations. The essential features such as the 'universal' resistance curves, the dependence of growth rate on the current K-factor and te amount of growth vs. time relations are shown to be strikingly similar. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0707100

Entities

People

  • Michael P. Wnuk

Organizations

  • South Dakota State University

Tags

DTIC Thesaurus Topics

  • Crack Propagation
  • Cracks
  • Equations
  • Resistance

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.
  • Neural Network Machine Learning.