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Erschienen in: Microsystem Technologies 2/2017

27.09.2016 | Technical Paper

Squeeze film characteristics of circular contacts at impact and rebound motion with micropolar lubricants

verfasst von: Li-Ming Chu, Jaw-Ren Lin, Yuh-Ping Chang, Hsiang-Chen Hsu

Erschienen in: Microsystem Technologies | Ausgabe 2/2017

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Abstract

In this paper, pure squeeze elastohydrodynamic lubrication (EHL) motion of circular contacts with micropolar lubricant is explored at the impact and rebound processes from a lubricated surface. On the basis of micro-continuum theory, the transient modified Reynolds equation is derived. Then it is solved simultaneously with the elasticity deformation, rheology, and ball motion equations in order to obtain the transient pressure profiles, film shapes, normal squeeze velocities, and accelerations. The simulation results reveal that the effect of the micropolar lubricant is equivalent to enhancing the lubricant viscosity, which would also enlarge the damper effect. Therefore, as the characteristic length (L) and coupling number (N) of the micropolar lubricants increase, the pressure spike and the dimple form earlier, the maximum pressure and the film thickness increase, the diameter of the dimple decreases, the rebounding velocity and the maximum acceleration decrease, and the maximum relative impact force decreases. Furthermore, the secondary peak of central pressure occurred at the rebound end is greater than the first peak of central pressure occurred at maximum impact force. As the effects of micropolar lubricants increase, the first and second peaks form earlier, the total impact time decreases, and the first and the second peaks increase.

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Literatur
Zurück zum Zitat Bansal P, Chattopadhayay AK, Agrawal VP (2015) Linear stability analysis of hydrodynamic journal bearings with a flexible liner and micropolar lubrication. Tribol Trans 58:316–326CrossRef Bansal P, Chattopadhayay AK, Agrawal VP (2015) Linear stability analysis of hydrodynamic journal bearings with a flexible liner and micropolar lubrication. Tribol Trans 58:316–326CrossRef
Zurück zum Zitat Chang L (1996) An efficient calculation of the load and coefficient of restitution of impact between two elastic bodies with a liquid lubricant. ASME J Appl Mech 63(2):347–352CrossRefMATH Chang L (1996) An efficient calculation of the load and coefficient of restitution of impact between two elastic bodies with a liquid lubricant. ASME J Appl Mech 63(2):347–352CrossRefMATH
Zurück zum Zitat Chetti B (2014) Analysis of a circular journal bearing lubricated with micropolar fluids including EHD effects. Ind Lubr Tribol 66(2):168–173CrossRef Chetti B (2014) Analysis of a circular journal bearing lubricated with micropolar fluids including EHD effects. Ind Lubr Tribol 66(2):168–173CrossRef
Zurück zum Zitat Dowson D, Higginson GR (1966) Elastohydrodynamic lubrication. Pergamon Press, Oxford, pp 88–92 Dowson D, Higginson GR (1966) Elastohydrodynamic lubrication. Pergamon Press, Oxford, pp 88–92
Zurück zum Zitat Dowson D, Wang D (1994) An analysis of the normal bouncing of a solid elastic ball on an oily plate. Wear 179:29–37CrossRef Dowson D, Wang D (1994) An analysis of the normal bouncing of a solid elastic ball on an oily plate. Wear 179:29–37CrossRef
Zurück zum Zitat Larsson R, Högund E (1994) Elastohydrodynamic lubricated at pure squeeze action. Wear 179:39–43CrossRef Larsson R, Högund E (1994) Elastohydrodynamic lubricated at pure squeeze action. Wear 179:39–43CrossRef
Zurück zum Zitat Larsson R, Högund E (1995) Numerical simulation of a ball impacting and rebounding a lubricated surface. ASME J Tribol 117:94–102CrossRef Larsson R, Högund E (1995) Numerical simulation of a ball impacting and rebounding a lubricated surface. ASME J Tribol 117:94–102CrossRef
Zurück zum Zitat Lin JR, Chou TL, Liang LJ, Hung TC (2012) Non-Newtonian dynamics characteristics of parabolic-film slider bearings: micropolar fluid model. Tribol Int 48:226–231CrossRef Lin JR, Chou TL, Liang LJ, Hung TC (2012) Non-Newtonian dynamics characteristics of parabolic-film slider bearings: micropolar fluid model. Tribol Int 48:226–231CrossRef
Zurück zum Zitat Naduvinamani NB, Santosh S (2011) Micropolar fluid squeeze film lubrication of finite porous journal bearing. Tribol Int 44(4):409–416CrossRef Naduvinamani NB, Santosh S (2011) Micropolar fluid squeeze film lubrication of finite porous journal bearing. Tribol Int 44(4):409–416CrossRef
Zurück zum Zitat Paul GR, Cameron A (1972) An absolute high-pressure microviscometer based on refractive index. Proc R Soc Ser A 331:171–184CrossRef Paul GR, Cameron A (1972) An absolute high-pressure microviscometer based on refractive index. Proc R Soc Ser A 331:171–184CrossRef
Zurück zum Zitat Prakash J, Sinha P (1975) Lubrication theory of micropolar fluids and its application to a journal bearing. Int J Eng Sci 13:217–232CrossRefMATH Prakash J, Sinha P (1975) Lubrication theory of micropolar fluids and its application to a journal bearing. Int J Eng Sci 13:217–232CrossRefMATH
Zurück zum Zitat Roelands CJA, Vlugter JC, Watermann HI (1963) The viscosity temperature pressure relationship of lubricating oils and its correlation with chemical constitution. ASME J Basic Eng 85(4):601–606CrossRef Roelands CJA, Vlugter JC, Watermann HI (1963) The viscosity temperature pressure relationship of lubricating oils and its correlation with chemical constitution. ASME J Basic Eng 85(4):601–606CrossRef
Zurück zum Zitat Safa MMA, Gohar R (1986) Pressure distribution under a ball impacting a thin lubricant layer. ASME J Tribol 108:372–376CrossRef Safa MMA, Gohar R (1986) Pressure distribution under a ball impacting a thin lubricant layer. ASME J Tribol 108:372–376CrossRef
Zurück zum Zitat Sanborn DM, Winer WO (1971) Fluid rheological effects in sliding elastohydrodynamic point contacts with transient loading: 1-film thickness. ASME J Lubr Technol 93(2):262–271CrossRef Sanborn DM, Winer WO (1971) Fluid rheological effects in sliding elastohydrodynamic point contacts with transient loading: 1-film thickness. ASME J Lubr Technol 93(2):262–271CrossRef
Zurück zum Zitat Shukla JB, Isa M (1975) Generalized reynolds type equation for micropolar lubricants and its application to optimum one-dimensional slider bearing effects of solid particle additives in solution. J Mech Eng Sci 17:280–284CrossRef Shukla JB, Isa M (1975) Generalized reynolds type equation for micropolar lubricants and its application to optimum one-dimensional slider bearing effects of solid particle additives in solution. J Mech Eng Sci 17:280–284CrossRef
Zurück zum Zitat Wong PL, Lingard S, Camerson A (1992) The high pressure impact microviscometer. Tribol Trans 35(3):500–508CrossRef Wong PL, Lingard S, Camerson A (1992) The high pressure impact microviscometer. Tribol Trans 35(3):500–508CrossRef
Zurück zum Zitat Yang PR, Wen SZ (1991a) Pure squeeze action in an isothermal elastohydrodynamic lubricated spherical conjunction, part 1: theory and dynamic load results. Wear 142:1–16CrossRef Yang PR, Wen SZ (1991a) Pure squeeze action in an isothermal elastohydrodynamic lubricated spherical conjunction, part 1: theory and dynamic load results. Wear 142:1–16CrossRef
Zurück zum Zitat Yang PR, Wen SZ (1991b) Pure squeeze action in an isothermal elastohydrodynamic lubricated spherical conjunction, part 2: constant speed and constant load results. Wear 142:17–30CrossRef Yang PR, Wen SZ (1991b) Pure squeeze action in an isothermal elastohydrodynamic lubricated spherical conjunction, part 2: constant speed and constant load results. Wear 142:17–30CrossRef
Metadaten
Titel
Squeeze film characteristics of circular contacts at impact and rebound motion with micropolar lubricants
verfasst von
Li-Ming Chu
Jaw-Ren Lin
Yuh-Ping Chang
Hsiang-Chen Hsu
Publikationsdatum
27.09.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
Microsystem Technologies / Ausgabe 2/2017
Print ISSN: 0946-7076
Elektronische ISSN: 1432-1858
DOI
https://doi.org/10.1007/s00542-016-3132-8

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