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Article Dans Une Revue Ultrasonics Année : 2015

Propagation of flexural waves in inhomogeneous plates exhibiting hysteretic nonlinearity: Nonlinear acoustic black holes

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Résumé

Theory accounting for the influence of hysteretic nonlinearity of micro-inhomogeneous material on flexural wave in the plates of continuously varying thickness is developed. For the wedges with thickness increasing as a power law of distance from its edge strong modifications of the wave dynamics with propagation distance are predicted. It is found that nonlinear absorption progressively disappearing with diminishing wave amplitude leads to complete attenuation of acoustic waves in most of the wedges exhibiting black hole phenomenon. It is also demonstrated that black holes exist beyond the geometrical acoustic approximation. Applications include nondestructive evaluation of micro-inhomogeneous materials and vibrations damping.
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Dates et versions

hal-02535957 , version 1 (07-04-2020)

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Vitali Goussev, Chenyin Ni, Alexey Lomonosov, Zhonghua Shen. Propagation of flexural waves in inhomogeneous plates exhibiting hysteretic nonlinearity: Nonlinear acoustic black holes. Ultrasonics, 2015, 61, pp.126-135. ⟨10.1016/j.ultras.2015.04.006⟩. ⟨hal-02535957⟩
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