Abstract
The interaction of a propagating crack in implanted silicon with self-emitted acoustic waves results in periodic patterns on fractured surfaces. Direct measurement of the acoustic emission ahead of the fracture front shows the emergence of dominant acoustic frequency related to the crack velocity. It is shown that the surface modifications are made of roughness modulations due to periodic deviations of the crack front. A physical mechanism explaining the pattern formation is proposed, well in agreement with the observed pattern wavelengths.
- Received 14 May 2018
DOI:https://doi.org/10.1103/PhysRevLett.121.195501
© 2018 American Physical Society
Physics Subject Headings (PhySH)
Focus
How Cracks Interact with the Sounds They Make
Published 5 November 2018
The acoustic waves emitted by a propagating crack can affect the crack’s motion and the marks it leaves behind.
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