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Asymptotic analysis of size dependent fracture strength using boundary effect concept

journal contribution
posted on 06.12.2017, 00:00 by Kai DuanKai Duan, X Hu
In this paper, the extensively-reported “size effect” phenomena in fracture mechanics tests are explained using the boundary effect concept. It is pointed out that the widely-observed size effect in fracture, including the dependence of the fracture energy on ligament, strength and fracture toughness on crack and/or ligament and the strength of geometrically similar specimens on characteristic size, is in fact, due to the boundary influence on the crack tip damage zone. Furthermore, the recently-developed asymptotic model is used to demonstrate that the dependence of strength on crack and ligament lengths as well as on the characteristic size of geometrically similar specimens is a result of the dominance of the distance of the crack tip to specimen boundaries on the specimen failure mode. To verify further the boundary effect concept, the asymptotic model is also applied to two sets of selected experimental data available in the literature, and the implications are discussed.

Funding

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

History

Issue

41-42

Start Page

125

End Page

133

Number of Pages

9

ISSN

1022-6680

Location

Switzerland

Publisher

Trans Tech Publications

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Biennial Conference; Institute for Resource Industries and Sustainability (IRIS); Process Engineering and Light Metals; University of Western Australia;

Era Eligible

Yes

Journal

Advanced materials research.

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