Evaluation of fracture toughness of aluminum alloys by tear test

Toshiro Kobayashi, Mitsuo Niinomi, Kouichi Ikeda

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The correlation between the fracture characteristics values evaluated from the tear test and the fracture toughness values were investigated. New method to evaluate the fracture toughness was examined by the tear test. The correlation between the fracture characteristics (σin, UIEt and UPEt), which were newly defined based on the true crack initiation point in the tear test and the fracture toughness values (KIC, JIC and Tmat) evaluated by the ASTM E-399 method was studied, and a good correlation was recognized between σin and KIC, UIEt and JIC, and UPEt and Tmat, respectively. The critical stress intensity factor (KC) obtained from the precracked tear test agree well with KIC values evaluated by the ASTM E-399 method. However, KC obtained from the standard tear test is overestimated about 20% comparing with the KIC because of the effect of the notch tip radius.

Original languageEnglish
Pages (from-to)9-15
Number of pages7
Journaljournal of japan institute of light metals
Volume38
Issue number1
DOIs
Publication statusPublished - 1988

Keywords

  • J integral
  • aluminum alloy
  • fracture toughness
  • size effect
  • tear test

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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