Spectral analysis of the topography parameters for isotropic Gaussian rough surfaces applied to gold coating

Najah, Mohamed; Maaboudallah, Farouk; Boucherit, Mohamed; Ferguson, M. W. J.; Fréchette, Luc; Charlebois, Serge A.; Boone, F.R.; Ecoffey, Serge

doi:10.1016/j.triboint.2021.107339

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…To complete the characterization, the PSD is used to describe the spatial arrangement in the plane. Figure 5a illustrates the computed 2D-PSD of the pad's surface using the developments in our previous research work [18,38]. It shows clearly that the pad's roughness is highly isotropic.…”

Section: Pad Surface Characterizationmentioning

confidence: 91%

“…The parameters c 1 , c 2 , q L , q c , C 0 and C 1 are computed using a suitable optimization scheme on the radially averaged PSD exactly as defined in Equation ( 22) of [18].…”

Section: Pad Surface Characterizationmentioning

confidence: 99%

“…Most rough surfaces have a self-affine property, which means that the profile remains similar under different magnification [13,15]. The latter can be decoded by a PSD having a power-law shape as a function of the wavenumber (or wavelength) with a potential plateau characterized by a longer wavelength, namely the long-distance roll-off wavevector [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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A Multi-Scale Investigation to Predict the Dynamic Instabilities Induced by Frictional Contact

Maaboudallah

Atalla

2023

Lubricants

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We propose a new variational formulation to model and predict friction-induced vibrations. The multi-scale computational framework exploits the results of (i) the roughness measurements and (ii) the micro-scale contact simulations, using the boundary element method, to enrich the contact zone of the macroscopic finite element model of rubbing systems with nominally flat contact boundaries. The resulting finite elements at the contact interface of the macroscopic model include (i) a modified normal gap and (ii) a micro-scale description of the contact law (i.e., pressure gap) derived by solving the frictionless contact problem on a rough surface indenting a rigid half-plane. The method is applied to a disc brake system to show its robustness in comparison with classical deterministic formulations. With respect to the traditional complex eigenvalues analysis, the proposed multi-scale approach shows that the inclusion of roughness significantly improves the results at low frequencies. In this panorama, any improvement of dynamic instabilities predictions should be based on an uncertainty analysis incorporating roughness combined with other parameters such as friction coefficient and shear moduli of the pads, rather than on roughness itself.

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Section: Pad Surface Characterizationmentioning

confidence: 91%

“…The parameters c 1 , c 2 , q L , q c , C 0 and C 1 are computed using a suitable optimization scheme on the radially averaged PSD exactly as defined in Equation ( 22) of [18].…”

Section: Pad Surface Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Multi-Scale Investigation to Predict the Dynamic Instabilities Induced by Frictional Contact

Maaboudallah

Atalla

2023

Lubricants

Self Cite

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Analysis of roughness profiles of steel surfaces after electroerosion machining

Grigoriev,

Masterenko,

Skoptsov

2023

Meas Tech

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Surface topography prediction of slider races using formed grinding wheel shape and material removal mechanism

Kang,

Hua,

et al. 2024

Archiv.Civ.Mech.Eng

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Compared with the roughness, the three-dimensional (3D) topography parameters, surface microstructure geometric characteristics and other information can more fully evaluate the grinding quality of the slider raceway surface. In this paper, based on the 3D topography model of the abrasive particle distribution on the surface of the formed grinding wheel, the material removal mechanism between the abrasive particle and the raceway surface is analyzed. With the undeformed chip thickness distribution model as the intermediate variable, the 3D topography model of the slider raceway surface is established, and the model verification is carried out from the roughness and the geometric characteristics of the surface microstructure, respectively. At the same time, the surface microstructure is extracted from the topography model, and the effects of different grinding process parameters on the geometric characteristics such as the height to width ratio, depth to width ratio and distribution density of groove, convex peak and peak valley structures are studied. Results are shown that AS,TH increase from [0.05 0.6 μm] to [0.25 0.8 μm] and FGH grows from [0.11 1.05 μm] to [0.5 1.61 μm] when the grinding depth rises from 1 μm to 4 μm. AS, TH are firstly decreased from [0.17 0.61 μm] to [0.08 0.52 μm] and then increased to [0.26 0.78 μm], and the FGH declines from [0.34 1.01 μm] to [0.16 0.86 μm] and then increases to [0.51 1.38 μm] with the feeding speed is in [25, 28 m/min]. In addition, in the range of grinding wheel linear velocity [28, 34 m/s], the AS,TH decreases from [0.19 0.81 μm] to [0.1 0.55 μm] and the FGH decreases from [0.55 1.6 μm] to [0.2 1.1 μm]. This can prepare for the subsequent research on the impact of the topography characteristics on the friction coefficient and wear amount of the slider raceway surface.

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Spectral analysis of the topography parameters for isotropic Gaussian rough surfaces applied to gold coating

Cited by 5 publications

References 32 publications

A Multi-Scale Investigation to Predict the Dynamic Instabilities Induced by Frictional Contact

A Multi-Scale Investigation to Predict the Dynamic Instabilities Induced by Frictional Contact

Analysis of roughness profiles of steel surfaces after electroerosion machining

Surface topography prediction of slider races using formed grinding wheel shape and material removal mechanism

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