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IssuesArchive of Issues2016-5pp.606-611

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A.K. Belyaev, A.M. Lobachev, V.S. Modestov, A.V. Pivkov, V.A. Polyanskii, A.S. Semenov, D.A. Tret'yakov, and L.V. Shtukin, "Estimating the Plastic Strain with the Use of Acoustic Anisotropy," Mech. Solids. 51 (5), 606-611 (2016)
Year 2016 Volume 51 Number 5 Pages 606-611
DOI 10.3103/S0025654416050149
Title Estimating the Plastic Strain with the Use of Acoustic Anisotropy
Author(s) A.K. Belyaev (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia, vice.ipme@gmail.com)
A.M. Lobachev (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia)
V.S. Modestov (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia)
A.V. Pivkov (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia)
V.A. Polyanskii (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia)
A.S. Semenov (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia)
D.A. Tret'yakov (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia)
L.V. Shtukin (Peter the Great St. Petersburg Polytechnic University, ul. Polytechnicheskaya 29, St. Petersburg, 195251 Russia)
Abstract Experimental verification is used to show that reference specimens and structure unloading do not permit obtaining an adequate estimate of plastic strain by measuring the acoustic anisotropy. Analytic estimates of the speed of propagation of a plane acoustic wave of various polarizations in an elastoplastic material in the direction orthogonal to the action of preliminary uniaxial stress are obtained. An analysis of the obtained relations reveala an advantage of using absolute values of the velocity of longitudinal and transverse waves for the plastic strain identification. In contrast to acoustic anisotropy, the velocities vary monotonically in a wider range of plastic strains. At the same time, the elastic strain does not affect the longitude wave velocity, which allows one to use the measurement results to estimate the character of strains.
Keywords acoustic anisotropy, plastic strain, longitudinal and transverse waves, ultrasonic diagnostics
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Received 11 May 2016
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