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On non‐Debye Linear Mechanical Response of Condensed Media
Author(s) -
Kuklov A. B.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221550209
Subject(s) - creep , anisotropy , exponent , shear modulus , linear response theory , debye , shear (geology) , diffusion , materials science , physics , statistical physics , mechanics , condensed matter physics , thermodynamics , optics , philosophy , linguistics , composite material
A phenomenological non‐Debye linear mechanical response theory for condensed media is presented which takes into account transverse diffusion currents induced by the external stresses due to the local anisotropy and inhomogeneity fluctuations (LAIF). The generalized linear shear modulus (GSM) and compliance (GSC) expressions are obtained in terms of the auto‐correlation function of the relevant LAIF representation. The theory is used to calculate the linear response fractional frequency exponent when transient diffusive creep takes place. The results are in reasonable agreement with the empirical Andrade creep law. Schoek's formula for internal friction is explained, too. To verify the theoretical predictions some experiments are proposed.