A simple method for determining material fracture parameters from peak loads

Tianxi Tang, Chengsheng Ouyang, Surendra P. Shah

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

A simple method (peak load method) for determining material fracture parameters KSIc and CTODc of the two-parameter fracture model is proposed in this paper. To apply this method for values of KSIc and CTODc of a concrete, one only needs to measure peak loads of three or more distinctive specimens. For specimens of the same geometry, they may be the same in size but different in notch length, or the same in notch length but different in size. A detailed procedure of calculating KSIc and CTODc from peak loads is provided. This method is verified by an experimental program, and confirmed by analysis of some existing data of three-point bend beam tests. It is found that the values of KSIc and CTODc obtained from the split-tension cylinders with the peak load method closely match the values of KSIc and CTODc obtained from the three-point bend beams with either the peak load method or the compliance method, previously recommended by RILEM. The successful use of split-tension cylinders reveals great potential of the peak load method in testing specimens cored from an existing structure so as to evaluate performance of the structure from the viewpoint of fracture mechanics.

Original languageEnglish (US)
Pages (from-to)147-157
Number of pages11
JournalACI Materials Journal
Volume93
Issue number2
StatePublished - Mar 1 1996

Keywords

  • Beams (supports)
  • Concretes
  • Cracking (fracturing)
  • Finite element method
  • Tension
  • Tests

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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