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Asymptotic analysis of boundary effects on fracture properties of quasi-brittle materials

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conference contribution
posted on 2017-12-06, 00:00 authored by Kai Duan, X Hu, F Wittmann
Composite materials such as concrete and ceramics with coarse material microstructures exhibit size-dependent fracture properties when the size of damage zone or fracture process zone (FPZ) around a crack tip is comparable to the structural or specimen size. These materials do not comply with the linear elastic fracture mechanics (LEFM), and therefore, are referred to as quasi-brittle materials. This size-dependence of fracture behaviour has been attributed to the interactions between the crack tip, fracture process zone and specimen boundaries [1,2]. It was pointed out recently that when a crack tip is close to a free boundary or a bimaterial interface, the stress/strain fields around the crack tip and associated damage zone will interact with the boundary, and the fracture behaviour of the structure is changed [1-5]. Therefore, the size effect in fracture of quasibrittle materials is in fact, due to the influence of specimen boundaries and/or bimaterial interfaces. This means that the size effect is a boundary effect in reality.


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Parent Title

Macro-, meso-, micro- and nano-mechanics of materials. special issue containing the proceedings of the International Symposium on Macro-, Meso-, Micro- and Nano-Mechanics of Materials : (MM2003) : 8-10 December, 2003, Hong Kong.

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End Page


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Start Date





Hong Kong, China


Trans Tech Publications Ltd

Place of Publication

Uetikon-Zuerich, Switzerland

Peer Reviewed

  • Yes

Open Access

  • No

External Author Affiliations

Qingdao Technological University; University of Western Australia;

Era Eligible

  • Yes

Name of Conference

International Symposium on Macro-, Meso-, Micro- and Nano-Mechanics of Materials