期刊
MECHANICS OF SOLIDS
卷 51, 期 5, 页码 606-611出版社
ALLERTON PRESS INC
DOI: 10.3103/S0025654416050149
关键词
acoustic anisotropy; plastic strain; longitudinal and transverse waves; ultrasonic diagnostics
类别
资金
- Russian Science Foundation [15-19-00091]
- Russian Science Foundation [15-19-00091] Funding Source: Russian Science Foundation
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.
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