Metadata (abstracts and keywords) for the articles in the journal
Garishin O.K., Shadrin V.V., Morozov I.A. // Vestnik I. Yakovlev Chuvach State Pedagogical University. Series: Mechanics of a limit state . 2024. № 4(62). p. 40-52
Mechanical tests of silicone rubber and nanocomposites based on it were carried out using the "nested cyclic deformations"program. The sample was subjected to cyclic loading with changing deformation rate and amplitude, with the minimum cyclic deformations increasing at each subsequent step, and the maximum ones decreasing. The deformation rate at each cycle remained constant. Upon reaching the minimum and maximum cyclic deformations, the grips of the tensile testing machine were stopped for a fixed period of time to remove the corresponding relaxation dependencies. Based on the test results, deformation and time (relaxation) loading curves were constructed, and the corresponding equilibrium dependencies were calculated based on them. The viscoelastic properties of elastomeric nanocomposites were studied depending on the filler type (at the same mass concentration) and deformation rate with their help,. Detonation nanodiamonds and few-layer graphene were used as fillers. It is established that for these materials the dissipative cyclic losses under loading are always greater than under unloading and this ratio weakly depends on the deformation rate. A quantitative assessment of the Mullins softening is carried out and the share of dissipative losses due to this effect is determined. Quantitative values of residual deformations are also determined using equilibrium curves.
The contact details of authors:
Oleg K. Garishin, Doctor of Sciences, Senior researcher of the lab of micromechanics of structurally inhomogeneous media of ICMM UB RAS; e-mail: gar@icmm.ru; https://or cid.org/0000-0001-7384-7366; AuthorID: 5880
Vladimir V. Shadrin, Lead engineer of the lab of micromechanics of structurally inhomogeneous media of ICMM UB RAS; e-mail: shadrin@icmm.ru; https://orcid.org/0009-0004-8172-6168; AuthorID: 10927
Ilya A. Morozov, PhD, Senior researcher of the lab of micromechanics of structurally inhomogeneous media of ICMM UB RAS; e-mail: imorozov@icmm.ru; https://orcid. org/0000-0001-6395-4301; AuthorID: 172118
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