Thermally induced local slip of contacting solids in vicinity of surface groove

Malanchuk, N. I.; Martynyak, R. M.; Monastyrskyy, Bohdan

doi:10.1016/j.ijsolstr.2011.02.028

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…Using the technique developed by Shvets and Martynyak [26], Martynyak [32], Malanchuk et al [37], Martynyak and Chumak [38,39] the temperature, heat fluxes, stresses and displacements in the both solids can be expressed in terms of the Muskhelishvili's complex potentials (see (15) in [39]). For the periodic contact problem under consideration this potentials has the following form: where d = a(1 + m)/K is the thermal distortivity [21],…”

Section: Reduction Of the Problem To A Nonlinear Singular Integrodiffmentioning

confidence: 99%

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Chumak¹,

Martynyak²

2012

International Journal of Heat and Mass Transfer

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Section: Reduction Of the Problem To A Nonlinear Singular Integrodiffmentioning

confidence: 99%

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Chumak¹,

Martynyak²

2012

International Journal of Heat and Mass Transfer

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“…Pauk (2005Pauk ( , 2007 investigated thermally induced partial slip between a flat-ended punch and an elastic half-space with different temperatures. The thermoelastic stick-slip contact problem for two semi-infinite solids in the presence of a single thermoinsulated interface gap was studied by Malanchuk et al (2011). The effect of thermal conductivity of an interstitial medium on partial slip between a textured half-space and a flat half-space, which is caused by an imposed heat flow, was examined by Chumak et al (2014).…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Slip in Elastic Contact Between Identical Materials

Streliaiev

Martynyak

Chumak

2021

Acta Mechanica Et Automatica

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The contact problem for interaction between an elastic sphere and an elastic half-space is considered taking into account partial thermomechanical frictional slip induced by thermal expansion of the half-space. The elastic constants of the bodies are assumed to be identical. The Amontons–Coulomb law is used to account for friction. The problem is reduced to non-linear boundary integral equations that correspond to the initial stage of mechanical loading and the subsequent stage of thermal loading. The dependences of the contact stress distribution, relative displacements of the contacting surfaces, dimensions of the stick and slip zones on temperature of the half-space are studied numerically. It was revealed that an increase in temperature causes increases in the shear contact stress and the relative shear displacements of the contacting surfaces. The absolute values of the shear contact stress reach their maximum at the boundaries of the stick zones. The greatest value of the moduli of the relative shear displacements are reached at the boundary of the contact region. The stick zone radius decreases monotonically according to a nonlinear law with increasing temperature.

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“…Analytical, numerical and experimental studies of energy dissipation due to friction in layered shell and bar structures are presented in [16][17][18][19][20]. Temperature effects during the interaction of elastic bodies under conditions of frictional contact and local heating are taken into account, in particular, by the authors of publications [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Nanofluids in Cooling Systems and Their Efficiency

Volchenko¹,

Киндрачук²,

Dolishniy³

et al. 2021

J. Nano- Electron. Phys.

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In the materials of the article, it is shown that based on multifactor analysis, the proposed models of nanofluids are taken into account in the base fluids; a collision between nanoparticles and molecules; nanoparticles that occur due to Brownian motion; thermal diffusion of nanoparticles and their interaction with molecules; formation of percolation trajectories with low heat capacity in a fluid; influence of interphase and boundary layers in the separation of the solid and fluid phases; the surface shell effect; thin nanolayers; particle clustering. The study of nanofluids comes down to determining their thermal conductivity coefficient. It is established that the obtained values of thermal conductivity coefficients, which are 10 times higher than usual, do not fit into the classical calculation schemes used to determine the heat transfer coefficients. For cavities of nanofluid cooling systems, the thermal resistances of heat transfer and thermal conductivity are fictitious in magnitude. This is due to the fact that in the cooling cavities, the driving force is the potential jumps between the layers of the nanofluid. We selected the materials for creating nanoliquids that will be used in the new design of the braking system. It is formed by Al2O3 particles enveloped by polymeric material FK-24A. The diameter of nanoparticles was 15, 35 and 80 m. An increase in particle size and concentration results in an increase in the thermal conductivity of the liquid. In place of nanoliquid and metal components contact, the electrical potential and intensity of the electric field of nanoliquid change, that is also described here. When the temperature of the nanofluid rises above 100 °C it may become an electrolyte. The use of nanofluids in lubrication of drawworks braking system reduces the wear of friction couples by ~ 20 % and increases the braking moment by about 13 %.

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Thermally induced local slip of contacting solids in vicinity of surface groove

Cited by 13 publications

References 12 publications

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Thermal rectification between two thermoelastic solids with a periodic array of rough zones at the interface

Thermomechanical Slip in Elastic Contact Between Identical Materials

Nanofluids in Cooling Systems and Their Efficiency

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