Evaluation of Some Crack Tip Finite Elements for Elastoplastic Fracture Analysis.

Abstract

Specialized nonlinear crack tip finite elements which include the amplitude of the plastic singular solution as an additional unknown are investigated to determine their capability to directly predict the J-integral for cracked elastoplastic bodies without recourse to numerical evaluation of the J-integral over arbitrarily chosen paths. The special elements are used in conjunction with conventional 12-node quadrilateral isoparametric elements. Power hardening and multilinear representations of the nonlinear stress-strain curve are considered for both deformation and incremental theories of plasticity.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1979
Accession Number
ADA071462

Entities

People

  • L. Nash Gifford
  • Peter D. Hilton

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Amplitude
  • Boundaries
  • Crack Tips
  • Displacement
  • Equations
  • Failure Mode And Effect Analysis
  • Geometry
  • Hardening
  • Intensity
  • J Integrals
  • Mechanics
  • Plastic Properties
  • Strain Hardening
  • Stresses
  • Test And Evaluation
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Materials Science (Mechanical Engineering).