Phonon emission induced dynamic fracture phenomena

F. Atrash*, A. Hashibon, P. Gumbsch, D. Sherman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We use molecular dynamics simulations to calculate the phonon energy emitted during rapid crack propagation in brittle crystals. We show that this energy is different for different crack planes and propagation directions and that it is responsible for various phenomena at several length scales: energetically preferred crack systems and crack deflection at the atomic scale, reduced maximum crack speed with volume at the micrometer scale, and the inability of a crack to attain the theoretical limiting speed at the macroscale. We propose to include the contribution of this energy in the Freund equation of motion of a dynamically propagating crack.

Original languageEnglish
Article number085502
JournalPhysical Review Letters
Volume106
Issue number8
DOIs
StatePublished - 23 Feb 2011
Externally publishedYes

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