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Journal of Applied Mechanics and Technical Physics

2018 year, number 6

Effect of Surface Layer Damage on Acoustic Anisotropy

A. S. Semenov, V. A. Polyanskii, L. V. Shtukin, D. A. Tretyakov
St. Petersburg Polytechnic University of Peter the Great, St. Petersburg, 195251, Russia
Keywords: акустическая анизотропия, эффект поверхностного слоя, эксперимент, моделирование, тензор поврежденности, acoustic anisotropy, surface layer effect, experiment, simulation, damage tensor

Abstract

Data on the speeds of longitudinal and transverse waves are used to derive relations for the principal values of the damage tensor proposed. The relationship between acoustic anisotropy and the main values of the damage tensor are established. The distribution pattern of local speeds and damage along the thickness of the specimen is studied. It is shown that damage is localized in a narrow surface layer, with local damage maxima far exceeding the average damage value