A three dimensional numerical investigation of the T* integral along a curved crack front

J. H. Jackson, A. S. Kobayashi, S. N. Atluri

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The Tε* integral was calculated numerically along an extending, tunneling crack front in an 8 mm thick, aluminum three-point bend (3PB) specimen, using a numerical model driven by experimentally obtained surface displacements. The model provided input to a contour integration for the Tε* integral, via the Equivalent Domain Integral (EDI) method with incremental plasticity. Validity of the analysis was ensured by the agreement of the Tε* integral obtained on the surface (plane stress) and the plane stress values from previous studies. Tε* was observed to decrease from the outer surface of the specimen to the more constrained mid-plane. This difference became more pronounced as the crack grew.

Original languageEnglish
Pages (from-to)17-29
Number of pages13
JournalCMES - Computer Modeling in Engineering and Sciences
Volume6
Issue number1
StatePublished - Jul 2004

Keywords

  • 3-D fracture
  • CTOA
  • Crack tunneling
  • Stable crack growth
  • Tε* integral

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