Crack Front Interaction with Self-Emitted Acoustic Waves Article Swipe

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Front (military) Wavelength Acoustic emission Acoustic wave Acoustics Physics Materials science Surface finish Surface roughness Physical acoustics Optics Composite material Meteorology

Damien Massy , F. Mazen , Didier Landru , Nadia Ben Mohamed , Samuel Tardif , Alexandre Reinhardt , F. Madeira , Oleg Kononchuk , F. Rieutord ·

YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.1103/physrevlett.121.195501 · OA: W2899780344

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.

Crack Front Interaction with Self-Emitted Acoustic Waves Article Swipe

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