Experimental methods for determining fracture process zone and fracture parameters

S. P. Shah*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


For quasi-brittle materials like concrete, rock and ceramic it is not possible to determine fracture toughness using laboratory-sized specimens and linear elastic fracture mechanics. This inapplicability of the conventional fracture mechanics is due to fracture process zone, R-curve type of behavior and precritical stable crack growth. In this keynote paper, a two-parameter fracture model developed at Northwestern University is described. The model is based on observations of fracture processes using laser holography as well as acoustic emission measurements.

Original languageEnglish (US)
Pages (from-to)3-14
Number of pages12
JournalEngineering Fracture Mechanics
Issue number1-3
StatePublished - 1990

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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