Dynamic stability of crack fronts: Out-of-plane corrugations

Mokhtar Adda-Bedia*, Rodrigo E. Arias, Eran Bouchbinder, Eytan Katzav

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The dynamics and stability of brittle cracks are not yet fully understood. Here we use the Willis-Movchan 3D linear perturbation formalism to study the out-of-plane stability of planar crack fronts in the framework of linear elastic fracture mechanics. We discuss a minimal scenario in which linearly unstable crack front corrugations might emerge above a critical front propagation speed. We calculate this speed as a function of Poisson's ratio and show that corrugations propagate along the crack front at nearly the Rayleigh wave speed. Finally, we hypothesize about a possible relation between such corrugations and the long-standing problem of crack branching.

Original languageAmerican English
Article number014302
JournalPhysical Review Letters
Volume110
Issue number1
DOIs
StatePublished - 4 Jan 2013
Externally publishedYes

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