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Sergey Ilyin, Valery Kulichikhin, Alexander Malkin
Characterization of material viscoelasticity at large deformations
Appl. Rheol. 24:1 (2014) 13653 (10 pages)
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Mechanical properties of various technological materials at large deformations are proposed to characterize by means of
some generalized parameters obtained at large oscillation strains but not related to any definite rheological equations. The
base for the analysis is the Lissajous- Bowditch figures in two coordinate systems - "stress - deformation" and "stress derivative
with respect to the phase angle - deformation". An area of the first of these figures provides the well known integral
estimation of dissipative losses in the deformation cycle while the second one presents the new integral measure of the matter's
elasticity. The correlation between the proposed integral estimations of the "averaged" dynamic modulus and the values
found in using Fourier and Chebyshev series was demonstrated. This integral method was applied for three suspensions
of various types. The obtained results allowed for viewing the type of non-linearity: pseudo-plasticity or dilatancy, stiffening
or softening, as functions of deformation.
► Cite this publication as follows:
Ilyin S, Kulichikhin V, Malkin A: Characterization of material viscoelasticity at large deformations, Appl. Rheol. 24 (2014) 13653.
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