Nonlinear Elastic Waves in a Solid Isotropic Wedge with Defectsстатья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:The paper presents experimental data for linear and nonlinear elastic waves in an acute-angled
wedge made of D16 isotropic polycrystalline alloy with defects. The localization of waves at the edge of the
wedge has been studied using laser vibrometry. The velocities of wedge waves have been measured by a pulsed
method in the frequency range 0.25–1.50 MHz. Measurements have not revealed any dispersion. The second
harmonic of the wedge waves has been found. The dependences of the velocity and amplitude of the second
harmonic on the amplitude of the first harmonic have been studied. It is noted that nonlinear effects observed
in wedge waves may be explained in terms of the Murnaghan classical five-constant theory of elasticity. They
are attributed to a defect-induced structural nonlinearity present in the wedge.