THE PROPULSION OF SURFACE FLAWS BY ELASTIC INDENTATION TESTING

Authors
DAI DN HILLS DA WARREN PD NOWELL D
Citation
Dn. Dai et al., THE PROPULSION OF SURFACE FLAWS BY ELASTIC INDENTATION TESTING, Acta metallurgica et materialia, 43(3), 1995, pp. 985-991
Citations number
18
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Acta metallurgica et materialia → ACNP
ISSN journal
09567151
Volume
43
Issue
3
Year of publication
1995
Pages
985 - 991
Database
ISI
SICI code
0956-7151(1995)43:3<985:TPOSFB>2.0.ZU;2-G
Abstract
An analysis is carried out of the crack tip stress intensity factor ex isting around the front of a semi-elliptical surface flaw, when it is propelled by a Hertzian indentation test. The influence of crack size, position, ellipticity and orientation on stress intensity factors and strain energy release rate is investigated. It is shown that generall y a surface flaw will ''run around'' to form a shallow ring crack befo re propagating inwards into the material.