Tε* integral as a crack growth criterion

Yoshika Omori, Albert S. Kobayashi, Hiroshi Okada, Satya N. Atluri, Paul W. Tan

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Tε*-integral values associated with stable crack growth in thin 2024-T3 aluminum single edge notched (SEN), central notched (CN) and compact (CT) specimens were evaluated experimentally and numerically along a near-crack contour, Γε, which elongated with crack extension. The surface displacement fields, which were determined by Moiré interferometry and by an elastic-plastic finite element (FE) simulation of the measured stable crack growth, were used to determine the Tε*. The experimentally and numerically determined Tε*'s and those of the crack tip opening angles (CTOA), were in excellent agreements with each other. Variations in Tε* and CTOA with crack extension of all three specimens were in essential agreement, albeit the continually increasing Tε* of the SEN specimen.

Original languageEnglish
Pages (from-to)147-154
Number of pages8
JournalMechanics of Materials
Issue number1-4
StatePublished - Jul 1998


  • Crack
  • Integral values
  • Surface

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    Omori, Y., Kobayashi, A. S., Okada, H., Atluri, S. N., & Tan, P. W. (1998). Tε* integral as a crack growth criterion. Mechanics of Materials, 28(1-4), 147-154. https://doi.org/10.1016/S0167-6636(97)00059-8