DETERMINATION OF FRACTURE ENERGY FROM SIZE EFFECT AND BRITTLENESS NUMBER.

Zdenek P. Bazant*, Phillip A. Pfeiffer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

283 Scopus citations

Abstract

The fracture energy of concrete is a basic material characteristic needed for a rational prediction of brittle failures of concrete structures. A series of tests on the size effect due to blunt fracture is reported and analyzed. It is proposed to define the fracture energy as the specific energy required for crack growth in an infinitely large specimen. Theoretically, this definition eliminates the effects of specimen size, shape, and the type of loading on the fracture energy values. The problem is to identify the correct size-effect law to be used for extrapolation to infinite size. It is shown that Bazant's recently proposed simple size-effect law is applicable for this purpose as an approximation. Indeed, very different types of specimens, including three-point bent, edge-notched tension, and eccentric compression specimens, are found to yield approximately the same fracture energy values.

Original languageEnglish (US)
Pages (from-to)463-480
Number of pages18
JournalACI Materials Journal
Volume84
Issue number6
StatePublished - Nov 1 1987

ASJC Scopus subject areas

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

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