The solution of the nonlinear differential equation which describes an initially sinusoidal finite-amplitude elastic wave propagating in a solid contains a static-displacement term in addition to the harmonic terms. The static-displacement amplitude is theoretically predicted to be proportional to the product of the squares of the driving-wave amplitude and the driving-wave frequency. We report the first experimental verification of the elastic-wave static displacement in a solid ([111] direction of single-crystal germanium) and find agreement with the theoretical predictions.
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Cantrell et al. (1980) studied this question.
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