Crack propagation in quasicrystals

Details Crack propagation in quasicrystals Crack propagation in quasicrystals

1998-04-24

arxiv.org/abs/cond-mat/9804279v1

Physics

Condensed Matter

Materials Science

4. pages, 4 figures

Scientific paper

10.1103/PhysRevLett.81.3163

Crack propagation is studied in a two dimensional decagonal model quasicrystal. The simulations reveal the dominating role of highly coordinated atomic environments as structure intrinsic obstacles for both dislocation motion and crack propagation. For certain overloads, these obstacles and the quasiperiodic nature of the crystal result in a specific crack propagation mechanism: The crack tip emits a dislocation followed by a phason wall, along which the material opens up.

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