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Lubricants
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Tribological Properties and Failure Prediction in Mechanical Elements
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Tribological Properties and Failure Prediction in Mechanical Elements

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

Deadline for manuscript submissions: closed (20 December 2023) | Viewed by 8555

Special Issue Editors

Dr. Saleh Akbarzadeh

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
Interests: tribology; lubricant properties; wear prediction; coatings
Prof. Dr. Michael M. Khonsari

E-Mail Website
Guest Editor
Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
Interests: tribology (friction, lubrication, wear); machinery performance analysis; numerical analysis; heat transfer
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Tribology knowledge plays an important role in enabling researchers and engineers to predict the performance of mechanical elements. Each year, a considerable amount of GDP of each country is directly or indirectly spent on tribology-related issues. For example, the energy waste due to frictional loss and material waste due to wear are both related to tribology.

Any research that can be used to predict failure in mechanical elements is highly valuable, since it can then be further modified to improve the useful life of mechanical elements, and therefore lead to energy saving. These researches are mainly based on models that take geometry, materials’ properties, and operating conditions as input and predict the useful life as output.

The intention of this Special Issue is to share advances in the abovementioned fields that can also be used by the industry for the invention of new failure prediction methods.

Dr. Saleh Akbarzadeh
Prof. Dr. Michael M. Khonsari
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

  • tribology
  • mechanical elements
  • failure prediction

Published Papers (5 papers)

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Research

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14 pages, 51762 KiB  
Article
Analysis of the Effect of the Chemical Composition of Bearing Alloys on Their Wear under Wet Friction Conditions
by Marcin Madej and Beata Leszczyńska-Madej
Lubricants 2023, 11(10), 426; https://doi.org/10.3390/lubricants11100426 - 02 Oct 2023
Viewed by 969
Abstract
This paper discusses the results of a study to determine the effect of the chemical composition of two tin-based bearing alloys (B89 and B83) on their tribological properties. The tribological properties were tested using a T05 block-on-ring tester under technically dry and wet [...] Read more.
This paper discusses the results of a study to determine the effect of the chemical composition of two tin-based bearing alloys (B89 and B83) on their tribological properties. The tribological properties were tested using a T05 block-on-ring tester under technically dry and wet friction conditions. The research includes the determination of the wear rates, loss of mass, coefficients of friction, and changes in the coefficient of friction as a function of the process and material parameters. A study of the microstructure and base properties of such alloys, which affect the tribological properties and wear, are also presented. The study showed that chemical composition has a significant effect on the tribological properties; increasing the proportion and changing the morphology of the SnSb precipitates to rhomboidal in the B83 alloy results in an increase in wear resistance represented by loss of mass. Decreasing the size and proportion of these precipitates results in a stabilization of the frictional force variation and a slight decrease in the coefficient of friction. The research showed that SnSb phase precipitation is mainly responsible for the wear resistance of the investigated bearing alloys. Full article
(This article belongs to the Special Issue Tribological Properties and Failure Prediction in Mechanical Elements)
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19 pages, 5698 KiB  
Article
Application of Load-Sharing Concept to Mechanical Seals
by Mohsen Rahimpour, Alireza Samadani and Saleh Akbarzadeh
Lubricants 2023, 11(6), 266; https://doi.org/10.3390/lubricants11060266 - 17 Jun 2023
Cited by 1 | Viewed by 1270
Abstract
Mechanical seals are mechanisms that are used to prevent fluid leakage. Since the seal surfaces are in contact with one another, hydrodynamic and contact forces are functions of surface roughness. Additionally, since the lubrication regime under specific operating conditions such as low speed [...] Read more.
Mechanical seals are mechanisms that are used to prevent fluid leakage. Since the seal surfaces are in contact with one another, hydrodynamic and contact forces are functions of surface roughness. Additionally, since the lubrication regime under specific operating conditions such as low speed or high load causes the seal to operate in the mixed lubrication regime, thus the contact of asperities plays an important role. The primary purpose of this paper is to apply the load-sharing concept to study the behavior of a mechanical seal in a mixed lubrication regime. The predicted results are compared to the published data from the literature, showing acceptable accuracy. The model presented in this paper can predict the performance of the mechanical seal system in a short execution time while providing acceptable accuracy by considering the surface roughness effect. Full article
(This article belongs to the Special Issue Tribological Properties and Failure Prediction in Mechanical Elements)
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19 pages, 9412 KiB  
Article
Multiscale Structural Mechanics of Rotary Shaft Seals: Numerical Studies and Visual Experiments
by Jeremias Grün, Marco Gohs and Frank Bauer
Lubricants 2023, 11(6), 234; https://doi.org/10.3390/lubricants11060234 - 23 May 2023
Cited by 1 | Viewed by 2238
Abstract
Although rotary shaft seals have been used successfully in many industrial applications for decades, their tribological behavior is still not completely understood. In-depth knowledge of the structural mechanics is essential for the design and optimization of such sealing systems. High complexity results from [...] Read more.
Although rotary shaft seals have been used successfully in many industrial applications for decades, their tribological behavior is still not completely understood. In-depth knowledge of the structural mechanics is essential for the design and optimization of such sealing systems. High complexity results from the multiscale interactions in the tribological system rotary shaft seal. Large macroscopic deformations occur due to the hyperelastic material behavior of elastomers coupled with microscopic tangential distortions of the sealing edge surface in the contact area. This paper includes both numerical and experimental studies on the tribological behavior of rotary shaft seals. A multiscale finite element model provides the simulation of the macroscopic deformations and the microscopic displacements. A test rig equipped with a hollow glass shaft enables in situ visual contact analyses, qualitative determinations of pressure distributions and quantitative measurements of elastomer surface distortions. The optical phenomenon of frustrated total internal reflection enables qualitative evaluations of the pressure distribution. Particle image velocimetry (PIV) is employed to quantify the tangential distortions. The test rig enables the measurement of the friction torque with the same configuration. The results of the numerical and experimental investigations for the radial load, friction torque and tangential distortions are compared and discussed. This serves to validate the simulation methods and the correlation of the measured parameters. This finally results in a solid and validated basis for further tribological investigations of rotary shaft seals. Full article
(This article belongs to the Special Issue Tribological Properties and Failure Prediction in Mechanical Elements)
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17 pages, 9459 KiB  
Article
Effects of Temperature on the Tribological Properties of Cylinder-Liner Piston Ring Lubricated with Different Oils
by Chang Du, Chenxing Sheng, Xingxin Liang, Xiang Rao and Zhiwei Guo
Lubricants 2023, 11(3), 115; https://doi.org/10.3390/lubricants11030115 - 06 Mar 2023
Cited by 3 | Viewed by 1799
Abstract
As one of the important friction pairs of a diesel engine, the cylinder-liner piston ring (CL-PR) faces a harsh high-temperature working environment. To explore the mapping relationship between the friction performance of the CL-PR and the change in temperature, the reciprocating-friction and wear-testing [...] Read more.
As one of the important friction pairs of a diesel engine, the cylinder-liner piston ring (CL-PR) faces a harsh high-temperature working environment. To explore the mapping relationship between the friction performance of the CL-PR and the change in temperature, the reciprocating-friction and wear-testing machine was used to analyze the friction performance and lubrication performance of four kinds of lubricating oil at different temperatures (room temperature, 60 °C, 90 °C, and 120 °C) from the friction coefficient, contact resistance and surface topography. The results show that the tribological properties of the four lubricating oils show different trends with the increase in temperature. The friction coefficient of the base oil first decreases and then increases with the increase in temperature; this shows that the friction property of the base oil is improved by a certain temperature rise, and the increase in temperature promotes the formation of an oxide film and reduces the friction coefficient. While the friction coefficient of other three lubricating oils with specific application scenarios increases first and then remains stable, the wear of the friction pair is the most severe at 120 °C. The wear forms are abrasive wear and adhesive wear. Full article
(This article belongs to the Special Issue Tribological Properties and Failure Prediction in Mechanical Elements)
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Review

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19 pages, 5465 KiB  
Review
Review of the Modeling Methods of Bucket Tooth Wear for Construction Machinery
by Zhengxing Dong, Feng Jiang, Yuanqiang Tan, Fuzeng Wang, Rong Ma and Jiawen Liu
Lubricants 2023, 11(6), 253; https://doi.org/10.3390/lubricants11060253 - 08 Jun 2023
Cited by 2 | Viewed by 1629
Abstract
Construction machinery, which is widely used in infrastructure construction, is growing rapidly all over the word. However, the complex working conditions of construction machinery lead to serious wear, particularly the wear of the bucket teeth on construction machinery. To control the wear procedure, [...] Read more.
Construction machinery, which is widely used in infrastructure construction, is growing rapidly all over the word. However, the complex working conditions of construction machinery lead to serious wear, particularly the wear of the bucket teeth on construction machinery. To control the wear procedure, it is essential to understand the wear mechanism and identify the wear form under variable working conditions. The modeling methods of bucket tooth wear with different wear mechanisms were reviewed. The modeling methods were divided into the analytical method and the numerical simulation method. The numerical simulation method included the discrete element method, finite element method, SPH method, and so on, which were used to simulate the bucket digging process and analyze the interaction between the material and bucket teeth during the working process. This enabled a force analysis of the bucket digging process and the identification of the location of maximum wear. By establishing a wear model, it is possible to better understand and address the wear problem in construction machinery. This article aims to summarize research methods concerning the wear of wear parts in construction machinery. It provides a theoretical foundation for future investigations in this area and aims to address challenges such as lengthy wear life testing, numerous interfering factors, and the difficulty of data collection pertaining to wear parts. Full article
(This article belongs to the Special Issue Tribological Properties and Failure Prediction in Mechanical Elements)
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