Crack linkup: An experimental analysis

L. Ma, A. S. Kobayashi, S. N. Atluri, P. W. Tan

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The Tε* integral was used to assess stable crack growth and crack linkup in 0.8 mm thick 2024-T3 aluminum tension specimens with multiple site damage (MSD) under monotonic and cyclic loads. The Tε* values were obtained directly from the recorded moiré fringes on the fracture specimens with and without MSD. The Tε* resistance curves of these fracture specimens of different geometries were in excellent agreement with each other. The results suggest that Tε* is a material parameter which can be used to characterize crack growth and linkup in the absence of large overloading. Tε* based crack growth and net-section-yield based crack linkup criteria for MSD specimens are proposed. The crack tip opening angle (CTOA) criterion can also be used to correlate crack growth larger than 2 mm.

Original languageEnglish
Pages (from-to)147-152
Number of pages6
JournalExperimental Mechanics
Issue number2
StatePublished - Jun 2002


  • Crack linkup
  • Fracture mechanics
  • Moiré interferometry
  • Multiple site damage (MSD)
  • Stable crack growth


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