Characterization of holding brake friction pad surface after pin-on-plate wear test

N. Drago, D. Gonzalez Madruga, L. De Chiffre

Research output: Contribution to journalJournal articleResearchpeer-review

95 Downloads (Pure)

Abstract

This article concerns the metrological characterization of the surface on a holding brake friction material pin after a pin-on-plate (POP) wear test. The POP test induces the formation of surface plateaus that affect brake performances such as wear, friction, noise and heat. Three different materials’ surfaces have been characterized after wear from data obtained with a focus variation 3D microscope. A new surface characterization approach with plateau identification is proposed, using the number of plateau on the surface, equivalent diameter, length and breadth as measurands. The identification method is based on determining and imposing ISO 27158-2 lower plateau limit (LPL) in material probability curves; and on applying a combined criterion of height segmentation threshold and equivalent diameter threshold. The method determines the criterion thresholds for each material since LPL appears typical by material. The proposed method has allowed quantifying the surface topography at two different levels of wear. An expanded measurement uncertainty of 3.5 µm for plateau dimensions in the range 50–2000 µm and one of 0.15 µm for plateau heights up to 10 µm have been documented.
Original languageEnglish
Article number015007
JournalSurface Topography: Metrology and Properties
Volume6
Issue number1
Number of pages14
ISSN2051-672X
DOIs
Publication statusPublished - 2018

Keywords

  • Holding brake friction pad
  • Wear
  • Surface characterization
  • Plateau
  • Segmentation

Cite this

@article{113f0f01c0e643a4947d28f00af19503,
title = "Characterization of holding brake friction pad surface after pin-on-plate wear test",
abstract = "This article concerns the metrological characterization of the surface on a holding brake friction material pin after a pin-on-plate (POP) wear test. The POP test induces the formation of surface plateaus that affect brake performances such as wear, friction, noise and heat. Three different materials’ surfaces have been characterized after wear from data obtained with a focus variation 3D microscope. A new surface characterization approach with plateau identification is proposed, using the number of plateau on the surface, equivalent diameter, length and breadth as measurands. The identification method is based on determining and imposing ISO 27158-2 lower plateau limit (LPL) in material probability curves; and on applying a combined criterion of height segmentation threshold and equivalent diameter threshold. The method determines the criterion thresholds for each material since LPL appears typical by material. The proposed method has allowed quantifying the surface topography at two different levels of wear. An expanded measurement uncertainty of 3.5 µm for plateau dimensions in the range 50–2000 µm and one of 0.15 µm for plateau heights up to 10 µm have been documented.",
keywords = "Holding brake friction pad, Wear, Surface characterization, Plateau, Segmentation",
author = "N. Drago and {Gonzalez Madruga}, D. and {De Chiffre}, L.",
year = "2018",
doi = "10.1088/2051-672X/aaabd3",
language = "English",
volume = "6",
journal = "Surface Topography: Metrology and Properties",
issn = "2051-672X",
publisher = "IOP Publishing",
number = "1",

}

Characterization of holding brake friction pad surface after pin-on-plate wear test. / Drago, N.; Gonzalez Madruga, D.; De Chiffre, L.

In: Surface Topography: Metrology and Properties, Vol. 6, No. 1, 015007, 2018.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Characterization of holding brake friction pad surface after pin-on-plate wear test

AU - Drago, N.

AU - Gonzalez Madruga, D.

AU - De Chiffre, L.

PY - 2018

Y1 - 2018

N2 - This article concerns the metrological characterization of the surface on a holding brake friction material pin after a pin-on-plate (POP) wear test. The POP test induces the formation of surface plateaus that affect brake performances such as wear, friction, noise and heat. Three different materials’ surfaces have been characterized after wear from data obtained with a focus variation 3D microscope. A new surface characterization approach with plateau identification is proposed, using the number of plateau on the surface, equivalent diameter, length and breadth as measurands. The identification method is based on determining and imposing ISO 27158-2 lower plateau limit (LPL) in material probability curves; and on applying a combined criterion of height segmentation threshold and equivalent diameter threshold. The method determines the criterion thresholds for each material since LPL appears typical by material. The proposed method has allowed quantifying the surface topography at two different levels of wear. An expanded measurement uncertainty of 3.5 µm for plateau dimensions in the range 50–2000 µm and one of 0.15 µm for plateau heights up to 10 µm have been documented.

AB - This article concerns the metrological characterization of the surface on a holding brake friction material pin after a pin-on-plate (POP) wear test. The POP test induces the formation of surface plateaus that affect brake performances such as wear, friction, noise and heat. Three different materials’ surfaces have been characterized after wear from data obtained with a focus variation 3D microscope. A new surface characterization approach with plateau identification is proposed, using the number of plateau on the surface, equivalent diameter, length and breadth as measurands. The identification method is based on determining and imposing ISO 27158-2 lower plateau limit (LPL) in material probability curves; and on applying a combined criterion of height segmentation threshold and equivalent diameter threshold. The method determines the criterion thresholds for each material since LPL appears typical by material. The proposed method has allowed quantifying the surface topography at two different levels of wear. An expanded measurement uncertainty of 3.5 µm for plateau dimensions in the range 50–2000 µm and one of 0.15 µm for plateau heights up to 10 µm have been documented.

KW - Holding brake friction pad

KW - Wear

KW - Surface characterization

KW - Plateau

KW - Segmentation

U2 - 10.1088/2051-672X/aaabd3

DO - 10.1088/2051-672X/aaabd3

M3 - Journal article

VL - 6

JO - Surface Topography: Metrology and Properties

JF - Surface Topography: Metrology and Properties

SN - 2051-672X

IS - 1

M1 - 015007

ER -