An experimental-numerical evaluation of the Tε* integral for a three-dimensional crack front

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

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The Tε* integral was calculated on the surface of single edge notched, three-point bend (SE(B)) specimens using experimentally obtained displacements. Comparison was made with Tε* calculated with the measured surface displacements and Tε* calculated at several points through the thickness of a finite element (FE) model of the SE(B) specimen. Good comparison was found between the surface Tε* calculated from displacements extracted from the FE model and the surface Tε* calculated from experimentally obtained displacements. The computed Tε* integral was also observed to decrease as the crack front was traversed from the surface to the mid-plane of the specimen. Mid-plane Tε* values tend to be approximately 10% of the surface values.

Original languageEnglish
Pages (from-to)207-213
Number of pages7
JournalExperimental Mechanics
Issue number2
StatePublished - Apr 2004


  • CTOA
  • Crack tunneling
  • Stable crack growth
  • T integral
  • Three-dimensional fracture


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