Finite Element Modeling of Elastic-Plastic Crack Growth.

Abstract

Numerical methods for the analysis of the elastic-plastic fracture problem using a special finite element technique are presented. A brief description of some concepts in elastic-plastic fracture mechanics and of the finite element method is followed by the formulation procedure of the stiffness matrix using eight-noded quadrilateral isoparametric elements. After a terse discussion of the initial stress method, the procedure of computation is extended in the analysis by using an incremental load process. The size and the shape of the plastic zone of a center crack specimen is investigated. The problem of crack growth is also studied using the moving crack tip element procedure. Results are presented in graphical form. It was found that the moving finite element technique can be modified to solve the crack branching problems.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1982
Accession Number
ADA120478

Entities

People

  • F. T. C. Loo

Organizations

  • Clarkson University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Crack Propagation
  • Crack Tips
  • Elastic Properties
  • Engineering
  • Finite Element Analysis
  • Fracture (Mechanics)
  • J Integrals
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Plastic Properties
  • Stiffness
  • Stress Intensity Factors
  • Stress Strain Relations
  • Stresses

Fields of Study

  • Engineering

Readers

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