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Machines
Special Issues
Design and Characterization of Engineered Bearing Surfaces
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Design and Characterization of Engineered Bearing Surfaces

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Machines Testing and Maintenance".

Deadline for manuscript submissions: 15 June 2025 | Viewed by 2719

Special Issue Editors

Dr. Robert Tomkowski

E-Mail Website
Guest Editor
Department of Production Engineering, Manufacturing and Metrology Systems, KTH Royal Institute of Technology, Brinellvägen 68, 114 28 Stockholm, Sweden
Interests: precision engineering; micromachines; surface engineering; industrial metrology; Barkhausen noise testing
Special Issues, Collections and Topics in MDPI journals
Dr. Ellen Bergseth

E-Mail Website
Guest Editor
Department of Engineering Design, KTH Royal Institute of Technology, Brinellvägen 85, 114 28 Stockholm, Sweden
Interests: friction; tribology; lubrication; surface analysis; experimental testing; surface engineering; materials; machine elements; conditions monitoring

Special Issue Information

Dear Colleagues,

The design and manufacturing of engineered bearing surfaces plays a crucial role in the performance and reliability of mechanical equipment. The bearings’ surface quality significantly impacts their operational efficiency, fatigue life, and overall reliability. Achieving precise and desired surface finishes is essential for optimal performance. As an example, for a gear pair, it greatly affects life and the level of undesired effects such as noise. The main challenges lie in:

  • Tolerance Control: Maintaining tight tolerances during manufacturing is challenging due to material variations and process limitations;
  • Surface Integrity: Achieving desired surface properties (such as hardness, roughness, and microstructure) without compromising bulk material properties is complex;
  • Wear and Friction: Balancing wear resistance and low friction is critical for prolonged bearing life;
  • Complex Geometries: Some bearing designs involve intricate shapes, making machining and finishing difficult.

When designing surfaces or, more concretely, selecting the manufacturing method and tool characteristics, there is always a balance between macro (form), micro (waviness), and surface roughness. The effect of macro and micro geometry can be simulated, often by using commercial tools; however, the link between these tools and advanced surface simulation tools is still an evolving research field. Therefore, there is a need for tribological testing and various ways of measuring, analyzing, and characterizing surfaces.

In this Special Issue, we wish to highlight the most recent and significant developments in surface characterization, preferably in collaboration with the manufacturing industry. This Special Issue encourages and welcomes original research articles with a significant contribution to numerical, theoretical, and experimental surface analyses. Review articles related to these application areas are also invited.

Dr. Robert Tomkowski
Dr. Ellen Bergseth
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Machines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • surface engineering
  • surface characterization
  • surface properties
  • wear mechanisms
  • measurement method
  • modeling and simulation
  • smart surfaces
  • sustainable practices

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Published Papers (2 papers)

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Research

15 pages, 3412 KiB  
Article
Prediction of Fretting Wear Lifetime of a Coated System
by Kyungmok Kim
Machines 2024, 12(12), 910; https://doi.org/10.3390/machines12120910 - 11 Dec 2024
Viewed by 677
Abstract
This article proposes a model of predicting the fretting wear lifetime of a low-friction coating. The proposed model incorporates multiple factors that influence the fretting wear damage of coatings: the imposed contact load, imposed average velocity, coating hardness, and initial surface roughness of [...] Read more.
This article proposes a model of predicting the fretting wear lifetime of a low-friction coating. The proposed model incorporates multiple factors that influence the fretting wear damage of coatings: the imposed contact load, imposed average velocity, coating hardness, and initial surface roughness of counterparts. The fretting wear lifetime of coatings, defined as the number of cycles critical to friction coefficient evolution, was collected from the literature. For the purpose of identifying parameters in the model, experimental fretting wear lifetime data were analyzed. The results show that the fretting wear lifetime of a coating can be described by an inverse power law regarding the contact load, imposed average velocity, and initial surface roughness of counterparts. In contrast, the fretting wear lifetime of a coating was observed to increase with increased coating hardness. It was observed that the exponents of the inverse power law varied with respect to the type of coating. The proposed fretting wear lifetime model enables the prediction of coating lifetime under various fretting conditions. Full article
(This article belongs to the Special Issue Design and Characterization of Engineered Bearing Surfaces)
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16 pages, 7381 KiB  
Article
An Investigation into the Optimal Dimple Geometry in a Single-Dimple Sliding Contact
by Raphael Scharf, Michael Pusterhofer, Jakob Gussmagg and Florian Grün
Machines 2024, 12(9), 622; https://doi.org/10.3390/machines12090622 - 5 Sep 2024
Cited by 1 | Viewed by 1258
Abstract
This study analyzes the influence of nine distinct texture geometries on a convergent oil film gap using a simulation model. The geometrical dimensions of the textures are characterized by the texture area density, Stex.,A and the ratio [...] Read more.
This study analyzes the influence of nine distinct texture geometries on a convergent oil film gap using a simulation model. The geometrical dimensions of the textures are characterized by the texture area density, Stex.,A and the ratio of the textured-to-untextured area (Atex./A0). The results show that different texture geometries optimize the tribological performance depending on the value of Stex.,A. Rectangular textures with variable widths (85% of the texture length atex.) significantly enhance lifting and the drag force across a broad range of Stex.,A. Furthermore, rectangular textures with a constant width (85% of the global width b0) show the best improvement within this study. The investigation also reveals that a small texture pitch angle, αtex, further enhances tribological performance. Full article
(This article belongs to the Special Issue Design and Characterization of Engineered Bearing Surfaces)
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