The role of entrapped lubricant in asperity flattening under bulk plastic deformation

Chris V. Nielsen; Maximilian F.R. Zwicker; Jon Spangenberg; Niels Bay; Paulo A.F. Martins

doi:10.1016/j.cirp.2022.03.001

The role of entrapped lubricant in asperity flattening under bulk plastic deformation

Chris V. Nielsen, Maximilian F.R. Zwicker, Jon Spangenberg, Niels Bay, Paulo A.F. Martins^*

^*Corresponding author for this work

University of Lisbon

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

The load bearing capacity of entrapped lubricant and resulting diminished asperity flattening are studied with a new specimen design that allows for both compression and biaxial bulk deformation of the subsurface material. Numerical simulations considering the experimental compressibility curve for the trapped oil support the analysis and show how incomplete filling of the valleys affect asperity flattening depending on the asperity flank angle. Finally, the new specimen design also allows quantifying the differences in friction when bulk deformation of the subsurface material is carried out with and without trapped oil in the valleys between asperities.

Original language	English
Journal	C I R P Annals
Volume	71
Pages (from-to)	241-244
ISSN	0007-8506
DOIs	https://doi.org/10.1016/j.cirp.2022.03.001
Publication status	Published - 2022

Keywords

Metal forming
Tribology
Lubrication

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10.1016/j.cirp.2022.03.001

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title = "The role of entrapped lubricant in asperity flattening under bulk plastic deformation",

abstract = "The load bearing capacity of entrapped lubricant and resulting diminished asperity flattening are studied with a new specimen design that allows for both compression and biaxial bulk deformation of the subsurface material. Numerical simulations considering the experimental compressibility curve for the trapped oil support the analysis and show how incomplete filling of the valleys affect asperity flattening depending on the asperity flank angle. Finally, the new specimen design also allows quantifying the differences in friction when bulk deformation of the subsurface material is carried out with and without trapped oil in the valleys between asperities.",

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AU - Nielsen, Chris V.

AU - Zwicker, Maximilian F.R.

AU - Spangenberg, Jon

AU - Bay, Niels

AU - Martins, Paulo A.F.

PY - 2022

Y1 - 2022

N2 - The load bearing capacity of entrapped lubricant and resulting diminished asperity flattening are studied with a new specimen design that allows for both compression and biaxial bulk deformation of the subsurface material. Numerical simulations considering the experimental compressibility curve for the trapped oil support the analysis and show how incomplete filling of the valleys affect asperity flattening depending on the asperity flank angle. Finally, the new specimen design also allows quantifying the differences in friction when bulk deformation of the subsurface material is carried out with and without trapped oil in the valleys between asperities.

AB - The load bearing capacity of entrapped lubricant and resulting diminished asperity flattening are studied with a new specimen design that allows for both compression and biaxial bulk deformation of the subsurface material. Numerical simulations considering the experimental compressibility curve for the trapped oil support the analysis and show how incomplete filling of the valleys affect asperity flattening depending on the asperity flank angle. Finally, the new specimen design also allows quantifying the differences in friction when bulk deformation of the subsurface material is carried out with and without trapped oil in the valleys between asperities.

KW - Metal forming

KW - Tribology

KW - Lubrication

U2 - 10.1016/j.cirp.2022.03.001

DO - 10.1016/j.cirp.2022.03.001

M3 - Journal article

SN - 0007-8506

VL - 71

SP - 241

EP - 244

JO - C I R P Annals

JF - C I R P Annals

ER -

The role of entrapped lubricant in asperity flattening under bulk plastic deformation

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