Finite Element Analysis of Creep and Three Dimensional Fracture.

Abstract

Assumed stress hybrid finite element methods are developed for linear fracture analysis of three dimensional solids and for fracture of metals under high temperature creep conditions. For the 3-D fracture analysis a series of special elements with hexagonal shape have been derived. These elements include the asymptotic singular behavior at the crack tip front. For the fracture analysis of metals at high temperature, a method has been developed to analyze plane problems with growing cracks. From a comprehensive literature survey made for both analytical and experimental studies of crack growth under creep conditions, it is concluded that a possible numerical method is to incorporate the concept of damage parameter by Kachanov. Preliminary development in incorporating such parameter in the finite element creep analysis has been made. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1978
Accession Number
ADA066753

Entities

People

  • Sung Won Lee
  • Theodore H. H. Pian

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aluminum Alloys
  • Continuum Mechanics
  • Crack Propagation
  • Crack Tips
  • Engineering
  • Experimental Data
  • Finite Element Analysis
  • Fracture (Mechanics)
  • High Temperature
  • J Integrals
  • Literature Surveys
  • Materials
  • Materials Science
  • Mechanics
  • Strain Rate
  • Three Dimensional

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.