A Criterion for Crack Kinking Out of an Interface |
| Journal |
Key Engineering Materials (Volumes 385 - 387) |
| Volume |
Advances in Fracture and Damage Mechanics VII |
| Edited by |
H.S. Lee, I.S. Yoon and M.H. Aliabadi |
| Pages |
9-12 |
| DOI |
10.4028/www.scientific.net/KEM.385-387.9 |
| Online since |
July, 2008 |
| Authors |
Dominique Leguillon,
Sébastien Murer
|
| Keywords |
Brittle Fracture, Crack Kinking, Interface, Matched Asymptotics |
| Abstract |
Cotterell and Rice theory (1980) on the kinking of a crack submitted to a biaxial loading
in a homogeneous material has been recently revisited (Leguillon and Murer 2008). The mixed
criterion for fracture which involves both an energetic and a stress condition (Leguillon 2002)
allows defining a positive threshold of the T-stress below which no branching can occur
(Selvarathinam and Goree 1998). This analysis enters within a more general mixed-mode analysis
(I+II+T-stress). Despite the complex terms and the oscillations, results extend to interfacial cracks.
The assumption of a crack jump as a consequence of the energy balance allows getting rid of the
problem brought by the oscillations due to these complex terms. This approach brings a new insight
on the prediction of crack kinking out of a bimaterial interface. |
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