FEM modeling of crack propagation in a model multiphase alloy

Lihe Qian, Seishi Nishido, Hiroyuki Toda, Toshiro Kobayashi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, several widely applied fracture criteria were first numerically examined and the crack-tip-region J-integral criterion was confirmed to be more applicable to predict fracture angle in an elastic-plastic multiphase material. Then, the crack propagation in an idealized dendritic two-phase Al-7%Si alloy was modeled using an elastic-plastic finite element method. The variation of crack growth driving force with crack extension was also demonstrated. It is found that the crack path is significantly influenced by the presence of α-phase near the crack tip, and the crack growth driving force varies drastically from place to place. Lastly, the simulated fracture path in the two-phase model alloy was compared with the experimentally observed fracture path.

Original languageEnglish
Pages (from-to)59-65
Number of pages7
JournalJournal of Materials Science and Technology
Volume22
Issue number1
Publication statusPublished - Jan 1 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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