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Size effect on specific fracture energy of concrete

journal contribution
posted on 06.12.2017, 00:00 by Kai DuanKai Duan, X Hu, F Wittmann
Size effect on the specific fracture energy GF of concrete can be adequately modelled by an uneven fracture energy distribution along the crack path induced by the specimen boundary influence. The boundary influence on GF can be neglected only if a specimen is very large so that the boundary region is a very small portion of the total fracture area. The underlying principle on the specimen boundary induced size effect provides a simple and logical explanation for the commonly observed size effect on GF. The boundary effect model recently proposed by the authors is used in this paper to quantitatively evaluate the specimen boundary influence so that the size-independent fracture energy is derived, which otherwise can only be measured with very large concrete specimens. New experimental results from a very different materialsystem, polymer, are analysed together with concrete results by the simple boundary effect model.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

74

Start Page

87

End Page

96

Number of Pages

10

ISSN

0013-7944

Location

London

Publisher

Elsevier

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Aedificat Institute Freiburg (Germany); University of Western Australia;

Era Eligible

Yes

Journal

Engineering fracture mechanics.