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Wave anisotropy of shear viscosity and elasticity

Rudenko, Oleg (author)
Blekinge Tekniska Högskola,Institutionen för maskinteknik
Sarvazyan, A.P. (author)
 (creator_code:org_t)
MAIK NAUKA/INTERPERIODICA/SPRINGER, 2014
2014
English.
In: Acoustical Physics. - : MAIK NAUKA/INTERPERIODICA/SPRINGER. - 1063-7710 .- 1562-6865. ; 60:6, s. 710-718
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The paper presents the theory of shear wave propagation in a "soft solid" material possessing anisotropy of elastic and dissipative properties. The theory is developed mainly for understanding the nature of the low-frequency acoustic characteristics of skeletal muscles, which carry important diagnostic information on the functional state of muscles and their pathologies. It is shown that the shear elasticity of muscles is determined by two independent moduli. The dissipative properties are determined by the fourth-rank viscosity tensor, which also has two independent components. The propagation velocity and attenuation of shear waves in muscle depend on the relative orientation of three vectors: the wave vector, the polarization vector, and the direction of muscle fiber. For one of the many experiments where attention was distinctly focused on the vector character of the wave process, it was possible to make a comparison with the theory, estimate the elasticity moduli, and obtain agreement with the angular dependence of the wave propagation velocity predicted by the theory.

Subject headings

NATURVETENSKAP  -- Matematik (hsv//swe)
NATURAL SCIENCES  -- Mathematics (hsv//eng)

Keyword

muscle
soft solids
anisotropy
shear elasticity
viscosity tensor
fiber
polarization vector

Publication and Content Type

ref (subject category)
art (subject category)

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By the author/editor
Rudenko, Oleg
Sarvazyan, A.P.
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NATURAL SCIENCES
NATURAL SCIENCES
and Mathematics
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Acoustical Physi ...
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Blekinge Institute of Technology

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