Construction of J-R curves using the common and concise formats

J. R. Donoso, J. Zahr, J. D. Landes

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


A new method for constructing J-R curves is presented, which directly generates the J-Δa relation in a closed, analytical form. This new method makes use of the Concise Format and the Common Format, both developed by Donoso and Landes. These formats relate load, P, to ligament length, b, and displacement - in the elastic and in the plastic deformation ranges, respectively - and have proved useful in calculations in fracture mechanics. Key to the method is the postulate of a "crack growth law" - a power-law relation between crack extension, Δa, and plastic displacement -used to express Jpl in terms of material properties, size parameters, and crack extension, giving rise to a Jpl-Δa analytical expression, similar to the power law J = C1(Δa)C2 suggested in ASTM Standard Test Method for Measurement of Fracture Toughness (E 1820). A few examples are included to show the use of the method, and comparisons are made with J-Δa curves calculated as per ASTM E 1820.

Original languageEnglish
Pages (from-to)323-339
Number of pages17
JournalASTM Special Technical Publication
Issue number1461
StatePublished - 2005
Externally publishedYes
Event34th National Symposium on Fatigue and Fracture Mechanics - Tampa, FL, United States
Duration: 19 Nov 200321 Nov 2003


  • Common format
  • Concise format
  • Ductile fracture methodology
  • Fracture toughness
  • J-R curves
  • Test evaluation


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