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Size effects : moving forwards

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conference contribution
posted on 06.12.2017, 00:00 by X Hu, Kai DuanKai Duan
A common size effect mechanism exists in fracture of vastly different materials with huge differences in size. The common mechanism is governed by the interaction of the critical crack, surface condition and material microstructures. The distance of a crack tip to the surface thus becomes an important measurement, which can either be the crack size itself or uncracked ligament depending on whether a shallow or deep crack is considered. The surface roughness and surface flaws form an effective boundary layer in micro-specimens/structures such as thin films and MEMS structures regardless whether they are amorphous, or have extremely fine micro-structures. The boundary layer in macro-specimens such as polycrystalline ceramics and concrete is determined by the material micro-structures and fracture process zone, which is also determined by the material micro-structure. The common size effect mechanism is then linked to the thickness or depth of the boundary layer and its ratio to the crack length or uncracked ligament.

Funding

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

History

Start Page

1

End Page

6

Number of Pages

6

Start Date

01/01/2006

ISBN-13

9781402049712

Location

Alexandroupolis, Greece

Publisher

Springer

Place of Publication

Dordrecht, Netherlands

Peer Reviewed

Yes

Open Access

No

Era Eligible

Yes

Name of Conference

European Conference of Fracture