A Deformation Plasticity Analysis of the Blunted Crack Tip in Plane Strain

Abstract

This paper presents a deformation plasticity analysis or the tip region of a blunted crack in plane strain. The power hardening material is incompressible both elastically and plastically, in order to simulate behavior of a stress freezing material above critical temperature. The study represents a full field, finite difference solution to the Mode 1 problem. Stress and displacement fields surrounding the crack tip are presented. The results of this study indicate that the maximum stress seen at the crack tip is indeed limited and is determined by the tensile properties; however, the scale over which the stresses act is dependent on the loading. Comparisons are good between the forward crack tip displacement and micro-fractographic measurements of stretch zones observed in plane strain fracture toughness tests.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1976
Accession Number
ADA374260

Entities

People

  • C. W. Smith
  • J. J. Mcgowan

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Constitutive Equations
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Critical Temperature
  • Displacement
  • Equations
  • Hardening
  • J Integrals
  • Materials
  • Measurement
  • Mechanics
  • Near Field
  • Plastic Properties
  • Strain Hardening
  • Stresses
  • Tensile Properties

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Dynamics.