Modelling of crystal plasticity effects on the crack initiation energies of a bi-crystal interface (Nb/Al2O3)

Amir Siddiq*, Siegfried Schmauder

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The present paper examines the crystal orientation effects on the energy at the crack-tip of niobium/alumina joints. The analyses have been done using crystal plasticity theory. The single crystal parameters are identified for each family of slips system in [21]. These identified parameters are being used to examine the orientation effects of the niobium single crystal on the energy at the crack-tip. Differences in the fracture energy are explained based on the plastic slip (strain) induced in different slip systems during deformation. A qualitative comparison of the crystal plasticity analysis with the experiments of [4, 15] is also been presented.

Original languageEnglish
Pages (from-to)67-78
Number of pages12
JournalComputer Assisted Mechanics and Engineering Sciences
Volume14
Issue number1
Publication statusPublished - 11 Jun 2007

Keywords

  • Crystal plasticity
  • Finite element methods
  • Fracture
  • Metal-ceramic interface

ASJC Scopus subject areas

  • Software
  • Computational Mechanics

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