T*ε integral under plane stress crack growth

Yoshika Omori, Hiroshi Okada, Leong Ma, Satya N. Atluri, Albert S. Kobayashi

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Abstract

The T*ε integral values associated with stable crack growth in A606 HSLA steel SEN specimens were determined experimentally and numerically. The displacement fields obtained through Moiré interferometry and elastic-plastic finite element analysis were used to evaluate T*ε associated with the moving crack tip. T*ε decreased with the reduction in the size of the integration contour, Γε, and continually increased with stable crack growth in this specimen. The measured and computed crack-tip opening angle (CTOA), on the other hand, was a constant 15° during stable crack growth after dropping from the measured and computed initial high values of 35 and 57°, respectively.

Original languageEnglish
Pages (from-to)61-71
Number of pages11
JournalASTM Special Technical Publication
Volume1296
StatePublished - 1997

Keywords

  • CTOA
  • Elastic-plastic fracture
  • J integral
  • Stable crack growth
  • T* integral

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    Omori, Y., Okada, H., Ma, L., Atluri, S. N., & Kobayashi, A. S. (1997). T*ε integral under plane stress crack growth. ASTM Special Technical Publication, 1296, 61-71.