Thermovisco-hyperelastic behavior of elastomeric materials modified by filler nanoparticles

Belyakova, T. A.; Zezin, Yu. P.; Ломакин, Е. В.

doi:10.3103/s0025654410040059

Cited by 6 publications

(5 citation statements)

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“…To analyze the obtained experimental data, we use an approach that permits representing the total stress s ij as the sum of two components, the hyperelastic component s h ij and the viscoelastic component s v ij [5],…”

Section: Analysis Of the Experimental Resultsmentioning

confidence: 99%

“…The well-known approximation as the sum of exponents was accepted for the relaxation function in [5],…”

Section: Analysis Of the Experimental Resultsmentioning

confidence: 99%

“…In this case, the difference between the true and conditional stress values increases with the strain level. To take into account the geometric nonlinearity of the elastomer deformation process considered, we can use the following generalization of relation (4.3) to the case of finite strains [5]:…”

Section: Analysis Of the Experimental Resultsmentioning

confidence: 99%

“…Thus, when estimating the performance of structural members made of such materials, it is necessary to take into account their high-elasticity characteristics and viscoelastic properties. An approach to describing the relaxation behavior of highly elastic composites based on decomposing the stress into two (hyperelastic and viscoelastic) components is proposed in [5]. The hyperelastic component is described by a five-constant potential.…”

Section: Introductionmentioning

confidence: 99%

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Study of viscoelastic properties of elastomers reinforced by nanoparticles

Zezin

Ломакин

2015

Mech. Solids

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The results of experimental studies of hyperelastic and relaxation properties of polymer composites with elastomer matrix based on hydrogenated nitrile-butadiene rubber filled with technical carbon particles in the temperature range 20-125 • C are presented. The characteristic experimental strain curves of materials in extension at a constant strain rate and the stress relaxation curves in materials at various tensile strain levels are given. A possible version of constitutive relations for describing some specific features of mechanical behavior of the considered materials under finite strains is considered. The obtained experimental data are used to verify the proposed constitutive relations experimentally. It is shown that the temperature-time analogy permits one to use the obtained constitutive relations to analyze nonmonotone variations in the relaxation properties of the considered materials as the temperature increases in the range under study.

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Section: Analysis Of the Experimental Resultsmentioning

confidence: 99%

“…The well-known approximation as the sum of exponents was accepted for the relaxation function in [5],…”

Section: Analysis Of the Experimental Resultsmentioning

confidence: 99%

Section: Analysis Of the Experimental Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of viscoelastic properties of elastomers reinforced by nanoparticles

Zezin

Ломакин

2015

Mech. Solids

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“…Various versions of the constitutive relations for a wide range of filled polymer materials were proposed in [5][6][7][8][9][10][11][12][13][14]. A version of the nonlinear theory of viscoelasticity was specially developed for HFPM in [15].…”

Section: Introductionmentioning

confidence: 99%

Law of damage accumulation and fracture criteria in highly filled polymer materials

et al. 2014

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We present the results of a large series of experiments aimed at the study of laws of damage accumulation and fracture in highly filled polymer materials under loading conditions of various types: monotone, repeated, low-and high-cycle, with varying type of stress state, dynamic (in general, more than 50 programs implemented on specimens from one lot of material). The data obtained in these test allow one to make conclusions about the constitutive role of the attained maximum of strain intensity when estimating the accumulated damage in the process of uniaxial tension by various programs (in particular, an additional cyclic deformation below the preliminary attained strain maximum does not affect the limit values of strain and stress in the subsequent active extension), about the strong influence of the stress state on the deformation and fracture, about the specific features of the nonlinear behavior of the material under the shock loading conditions and its influence on the repeated deformation. All tests are described (with an accuracy acceptable in practical calculations, both with respect to stresses and strains in the process of loading and at the moment of fracture) in the framework of the same model of nonlinear viscoelasticity with the same set of constants. The constants of the proposed model are calculated according to a relatively simple algorithm by using the results of standard uniaxial tension tests with constant values of the strain rate and hydrostatic pressure (each test for 2-3 levels of these parameters chosen from the ranges proposed in applications, each loading lasts until the fracture occurs, and one of the tests contains an intermediate interval of total loading and repeated loading) and one axial shock compression test if there are dynamic problems in the applications. The model is based on the use of the criterion fracture parameter which, in the class of proportional loading processes, is the sum of partial increments of the strain intensity on active segments of the process (where the strain intensity is at its historical maximum) with the form of the stress state and the intensity of strain rates taken into account.

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