Elastic-Plastic Deformation in Cracked Solids and Ductile Fracture Criterion.

Abstract

Linear elastic fracture mechanics has been very successful in dealing with brittle fractures of high strength and low and medium toughness materials. According to the conventional practice, a large specimen is required to measure the valid KIC value of a tough material. For a very tough material, the required specimen size could be too large for a typical laboratory testing machine to handle. Therefore, a new fracture criterion consistent with the basic principles of the linear elastic fracture mechanics is needed to measure high fracture toughness values. The development of the linear elastic fracture mechanics is based on the crack tip elastic stress and strain fields. A thorough understanding of the crack tip deformation and the crack tip stresses in the case of general yielding is necessary to develop a reliable ductile fracture theory.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1977
Accession Number
ADA045905

Entities

People

  • H. W. Liu
  • Sheng-yi Kuo
  • Wan-liang Hu

Organizations

  • Syracuse University

Tags

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Alloys
  • Chemical Engineering
  • Crack Tips
  • Elongation
  • Engineering
  • Far Field
  • Fracture (Mechanics)
  • Geometry
  • Intensity
  • Materials
  • Materials Science
  • Mechanics
  • Military Research
  • Plastic Deformation
  • Security
  • Universities

Readers

  • Materials Science (Mechanical Engineering).
  • Systems Analysis and Design