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Lubricants
Special Issues
Modeling and Characterization of Wear
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Modeling and Characterization of Wear

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: 31 January 2025 | Viewed by 2312

Special Issue Editors

Dr. Tanmaya Mishra

E-Mail Website
Guest Editor
Surface Technology and Tribology, Faculty of Engineering Technology, University of Twente, 7500 AE Enschede, The Netherlands
Interests: friction and wear modelling; boundary lubrication; tribology in metal forming; geotribology; coatings; stick–slip interfaces
Dr. Norbert Bader

E-Mail Website
Guest Editor
Surface Technology and Tribology, Faculty of Engineering Technology, University of Twente, 7500 AE Enschede, The Netherlands
Interests: tribology; rheology; EHL lubrication; rolling element bearing; seals; failure analysis; mechanical engineering design; grease

Special Issue Information

Dear Colleagues,

Wear on materials predominantly contributes to the degradation and failure of mechanical systems. The lack of understanding of wear is explicable due to the challenges in simulating and characterizing wear phenomena effectively for different tribological conditions, especially given the synergistic and transient nature of wear. The limitations range from analysis of worn specimens to developing lab-scale experiments and multiscale wear models, replicating tribogical systems.

Analyzing and modelling wear requires the characterization of worn specimens. This necessitates quantifying wear using instrumented methods like microscopy and spectroscopy.

Because of the multiscale and multiphysical nature of wear, wear models may be mesh- or particle-based, (semi-) analytical or probabilistic, and/or employ hybrid methods. It is important that wear models have a physical basis and are validated experimentally.

The scope of this Special Issue will include research work on experimental wear characterization and numerical wear models. The research approach taken can employ related studies on contact mechanics, surface engineering, as well as frictional and lubrication. Of interest are numerical and experimental methods to simulate and analyze complex wear phenomena such as three-body abrasive wear, surface fatigue, adhesive wear, fretting, tribochemical wear, erosion, and lubricant wear.

Dr. Tanmaya Mishra
Dr. Norbert Bader
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. Lubricants 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 2600 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 degradation
  • wear modelling
  • wear analysis
  • abrasion
  • adhesive wear
  • sliding wear
  • fatigue
  • tribo-corrosion
  • fretting
  • molecular dynamics

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Published Papers (3 papers)

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Research

24 pages, 1273 KiB  
Article
Towards a Model-Based Methodology for Rating and Monitoring Wear Risk in Oscillating Grease-Lubricated Rolling Bearings
by Arne Bartschat, Matthias Stammler and Jan Wenske
Lubricants 2024, 12(12), 415; https://doi.org/10.3390/lubricants12120415 (registering DOI) - 26 Nov 2024
Abstract
Oscillating grease-lubricated slewing bearings are used in several applications. One of the most demanding and challenging is the rotor blade bearings of wind turbines. They allow the rotor blades to be turned to control the rotational speed and loads of the complete turbine. [...] Read more.
Oscillating grease-lubricated slewing bearings are used in several applications. One of the most demanding and challenging is the rotor blade bearings of wind turbines. They allow the rotor blades to be turned to control the rotational speed and loads of the complete turbine. The operating conditions of blade bearings can lead to lubricant starvation of the contacts between rolling elements and raceways, which can result in wear damages like false brinelling. Variable oscillating amplitudes, load distributions, and the grease properties influence the likelihood of wear occurrence. Currently, there are no methods for rating this risk based on existing standards. This work develops an empirical methodology for assessing and quantifying the risk of wear damage. Experimental results of small-scale blade bearings show that the proposed methodology performs well in predicting wear damage and its progression on the raceways. Ultimately, the methods proposed here can be used to incorporate on-demand lubrication runs of pitch bearings, which would make turbine operation more reliable and cost-efficient. Full article
(This article belongs to the Special Issue Modeling and Characterization of Wear)
11 pages, 3940 KiB  
Article
Effect of Grinding Media Grading on Liner Wear and Load Behavior in a Ball Mill by Using Rocky DEM
by Zixin Yin, Daoming Ma and Tongqing Li
Lubricants 2024, 12(10), 340; https://doi.org/10.3390/lubricants12100340 - 30 Sep 2024
Viewed by 885
Abstract
The liner is a wear-prone component in ball mills, subject to continuous impacts, squeezing, and abrasion from the grinding media during operation. Its service performance directly affects the working efficiency of the ball mill. The service life of mining ball mill liners is [...] Read more.
The liner is a wear-prone component in ball mills, subject to continuous impacts, squeezing, and abrasion from the grinding media during operation. Its service performance directly affects the working efficiency of the ball mill. The service life of mining ball mill liners is about 8 months, and frequent downtimes occur due to liner wear and loss of effectiveness, with liner replacement accounting for about 6% of the total cost, resulting in huge economic losses. This paper focuses on a Φ305 mm × 150 mm experimental ball mill, using the discrete element software Rocky Discrete Element Method (DEM) (software version number Rocky 2022 R2) for simulation modeling analysis. With Φ10 mm and Φ20 mm mono-size particle simulations serving as reference groups, this study investigates the motion states and liner abrasion patterns under different liner heights for both sizes of grinding media in Equilibrium Quality Manufacturer (EQM) and Original Equipment Manufacturer (OEM) gradations. The results indicate that the impact of liner height on the wear of the ball mill liners is related to the size and gradation of the grinding media. The degree of liner wear from highest to lowest is as follows: EQM > Φ20 mm > OEM > Φ10 mm. Due to the effect of the cylinder end cap, the wear at the axial center of the ball mill liner is more severe than at both ends, and the wear on the facing side of the liner is more severe than on the backside. A thorough study of the influence of ball mill grinding media gradation on the wear pattern of liners is of great theoretical significance for optimizing liner structures, improving grinding efficiency, and promoting energy saving and cost reduction in ball mills. This study provides theoretical guidance for understanding the mechanisms behind liner wear in ball mills and predicting the liner lifespan. Full article
(This article belongs to the Special Issue Modeling and Characterization of Wear)
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15 pages, 8783 KiB  
Article
A Phenomenological Model for Estimating the Wear of Horizontally Straight Slurry Discharge Pipes: A Case Study
by Xinggao Li, Yidong Guo, Xingchun Li, Hongzhi Liu, Yi Yang and Yingran Fang
Lubricants 2024, 12(6), 228; https://doi.org/10.3390/lubricants12060228 - 19 Jun 2024
Viewed by 723
Abstract
When a slurry TBM advances in pebble and rock strata, large rock particles are carried in pipelines out of a tunnel by moving slurry. To estimate the wear of horizontally straight slurry discharge pipes, a phenomenological model was proposed that was mainly based [...] Read more.
When a slurry TBM advances in pebble and rock strata, large rock particles are carried in pipelines out of a tunnel by moving slurry. To estimate the wear of horizontally straight slurry discharge pipes, a phenomenological model was proposed that was mainly based on knowledge gained by means of direct and indirect in situ observations. The proposed model applies an equation composed of three variables, namely, the wear rate (λ), the central angle (2α), and the excavated tunnel length (L), to estimate the wear distribution along a pipe’s internal surface. The results indicated that wear mainly occurred on the bottoms of pipes. In addition, linear relationships between the maximum pipe wear amount (δmax) and the excavated tunnel length (L) were found for specific pipes and specified types of ground. The observed wear rates of different pipes in different types of ground had varied constants. The wear rates were higher for pipes in rock ground than for those in a pebble layer. For horizontally straight pipes, the observed wear rates were 0.0045 mm/m in a pebble layer and 0.0212 mm/m in rock ground. Lastly, to improve the proposed model, more field monitoring will be necessary to determine the pipe wear rates in different types of ground in the future. Full article
(This article belongs to the Special Issue Modeling and Characterization of Wear)
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