Morphological transformation of the process zone at the tip of a propagating crack. I. Simulation

Stress concentration at a crack tip engenders a process zone, a small domain containing a phase, different from that in the bulk of the solid. We demonstrate that this zone at the tip of a propagating crack exhibits a morphological transformation with an increase of the crack velocity. The concave z...

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Bibliographic Details
Published in:Physical review. E 2020-03, Vol.101 (3-1), p.033003-033003, Article 033003
Main Authors: Boulbitch, Alexei, Korzhenevskii, Alexander L
Format: Article
Language:English
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Summary:Stress concentration at a crack tip engenders a process zone, a small domain containing a phase, different from that in the bulk of the solid. We demonstrate that this zone at the tip of a propagating crack exhibits a morphological transformation with an increase of the crack velocity. The concave zone shape with an invagination in its back that is characteristic of a slow crack transforms into a droplet-shaped convex zone upon exceeding a critical velocity value, v_{G}. In this latter case, a metastable wake follows the propagating zone. We obtained this result by computer simulation of a crack propagating in a solid exhibiting a first-order phase transformation.
ISSN:2470-0045
2470-0053
DOI:10.1103/PhysRevE.101.033003