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Journal Articles Journal of Applied Physics Year : 2021

Experimental study of post-crack vibrations in dynamic fracture

Abstract

Vibrations induced by crack propagation in a strip of bonded silicon wafers are studied. A new optical setup enables the fast recording of crack-originated acoustic waves, emitted both ahead and behind the crack front, in bonded and separated wafers, respectively. Three types of crack-induced vibrations are identified, corresponding to different excitations and responses of the system: (1) “pneumatic” vibrations involving inertia and gas expansion/compression, (2) standard flexural waves involving inertia and bending rigidity, and (3) post-crack vibrations involving inertia, bending rigidity, and coupling to gas pressure. We show that a standard “beam on elastic foundation” model can explain these latter vibrations that occur along crack edges and is consistent with the observed frequencies.
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Dates and versions

cea-03224214 , version 1 (11-05-2021)

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Pauline Ronseaux, Florence Madeira, Frédéric Mazen, Didier Landru, Oleg Kononchuck, et al.. Experimental study of post-crack vibrations in dynamic fracture. Journal of Applied Physics, 2021, 129, pp.185103. ⟨10.1063/5.0047626⟩. ⟨cea-03224214⟩
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