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Advanced Materials and Technologies for Aviation and Automotive Applications
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Advanced Materials and Technologies for Aviation and Automotive Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (20 July 2023) | Viewed by 6179

Special Issue Editor

Dr. Piotr Wróblewski

E-Mail Website
Guest Editor
1. Faculty of Mechatronics, Armament and Aerospace of the Military University of Technology, Ul. Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland
2. Faculty of Engineering, University of Technology and Economics H. Chodkowska, 82f Jagiellońska St., 03-301 Warsaw, Poland
Interests: simulation and experimental studies of the dynamics of piston mechanisms of internal combustion engines; modeling with the use of neural networks to calculate the executive parameters of vehicles with conventional and alternative drives; research on frictional resistance of piston rings; modeling of oil film parameters on the cylinder bearing surface of an internal combustion engine; study of the structural changes of the experimental surface of the mating kinematic pairs of the engine
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Currently, the development of technologies and materials used in the construction of internal combustion engines for aviation and vehicles is of great importance in terms of the correct overall efficiency of these engines. Increasing thermal loads of engines in order to increase their operational performance causes problems with their durability and accelerated wear. The aim of this Special Issue is to present the latest research results in the field of the construction and design of internal combustion engines. There is a great need to modernize the current state of knowledge in the field of operation, wear processes, technologies, base materials, and coatings used in the construction of internal combustion engine components. Materials, coatings, and physical phenomena occurring in aircraft and car engines constitute a very wide range of knowledge. Therefore, I encourage you to publish materials from simulation and experimental research in the field of new material technologies, tribology, thermodynamics, fluid mechanics, and dynamics of internal combustion engines. In the era of great pressure to reduce the emission of toxic exhaust gases, results related to exhaust emission tests with the use of the latest tools, with the simultaneous description of physical and chemical phenomena occurring in the engine, are welcome. I also encourage you to publish materials related to the exhaust gas cleaning systems of aircraft and car engines.

Dr. Piotr Wróblewski
Guest Editor

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. Materials is an international peer-reviewed open access semimonthly 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

  • aircraft and car combustion engines
  • performance of internal combustion engines
  • thermal and mechanical losses of motors
  • anti-wear and thermal materials and coatings
  • dynamics of internal combustion engine mechanisms
  • tribology of kinematic pairs
  • simulation tests of oil film parameters
  • combustion thermodynamics
  • reducing the emission of toxic exhaust substances
  • alternative and conventional fuels

Published Papers (3 papers)

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Research

17 pages, 2658 KiB  
Article
The Theory of the Surface Wettability Angle in the Formation of an Oil Film in Internal Combustion Piston Engines
by Piotr Wróblewski
Materials 2023, 16(11), 4092; https://doi.org/10.3390/ma16114092 - 31 May 2023
Cited by 3 | Viewed by 1010
Abstract
In internal combustion piston engines, the formation of an oil film is completely different from that seen in industrial machines. The molecular adhesion force at the interface between the surface coating of engine parts and the lubricating oil determines the load-carrying capacity and [...] Read more.
In internal combustion piston engines, the formation of an oil film is completely different from that seen in industrial machines. The molecular adhesion force at the interface between the surface coating of engine parts and the lubricating oil determines the load-carrying capacity and the ability to form a lubricated film. The geometry of the lubricating wedge between the surfaces of the piston rings and the cylinder wall is created by the thickness of the oil film and the height of the ring’s coverage with lubricating oil. This condition is affected by many of the parameters that characterize the engine’s operation and the physical and chemical parameters of the coatings used for the cooperating pairs. For lubricant particles that reach energies that are higher than the potential energy barrier regarding adhesive attraction at the interface, slippage occurs. Therefore, the value of the contact angle of the liquid on the surface of the coating depends on the value of the intermolecular force of attraction. According to the current author, there is a strong relationship between the contact angle and the lubrication effect. The paper shows that the surface potential energy barrier is a function of the contact angle and contact angle hysteresis (CAH). The innovation of the current work consists in examining the contact angle and CAH under the conditions of thin layers of lubricating oil, in cooperation with hydrophilic and hydrophobic coatings. The thickness of the lubricant film was measured under various speed and load conditions, using optical interferometry. The study shows that CAH is a better interfacial parameter for correlation with the effect of hydrodynamic lubrication. This paper presents the mathematical relationships relating to a piston engine, various coatings, and lubricants. Full article
(This article belongs to the Special Issue Advanced Materials and Technologies for Aviation and Automotive Applications)
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23 pages, 7536 KiB  
Article
Experimental Studies of Welded Joints in Structures Subject to High Impact Vibrations Using Destructive and Non-Destructive Methods
by Piotr Wróblewski, Mariusz Niekurzak and Stanisław Kachel
Materials 2023, 16(5), 1886; https://doi.org/10.3390/ma16051886 - 24 Feb 2023
Cited by 2 | Viewed by 1331
Abstract
This article presents the issues of control and quality assurance of high-strength railway rail joints. Selected test results and requirements for rail joints made by welding with stationary welders on the basis of the requirements included in the PN-EN standards have been described. [...] Read more.
This article presents the issues of control and quality assurance of high-strength railway rail joints. Selected test results and requirements for rail joints made by welding with stationary welders on the basis of the requirements included in the PN-EN standards have been described. In addition, destructive and non-destructive tests of weld quality were performed, including visual tests, geometrical measurements of irregularities, magnetic particle and penetration tests, fracture tests, observations of micro- and macro-structure and hardness measurements. The scope of these studies included conducting tests, monitoring the process and evaluating the results obtained. Laboratory tests on the rail joints confirmed the good quality of the rail joints from the welding shop. Increasingly less damage to the track in places of new welded joints is proof that the methodology of laboratory qualification tests is correct and fulfils its task. The presented research will help educate engineers on the welding mechanism and the importance of quality control of rail joints during their design. The results of this study are of key importance for public safety and will improve knowledge on the correct implementation of the rail joint and how to conduct quality control tests in accordance with the requirements of the currently applicable standards. It will help engineers choose the right welding technique and choose solutions to minimize cracks. Full article
(This article belongs to the Special Issue Advanced Materials and Technologies for Aviation and Automotive Applications)
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24 pages, 9310 KiB  
Article
Identification of Differential Drive Robot Dynamic Model Parameters
by Michał Siwek, Jarosław Panasiuk, Leszek Baranowski, Wojciech Kaczmarek, Piotr Prusaczyk and Szymon Borys
Materials 2023, 16(2), 683; https://doi.org/10.3390/ma16020683 - 10 Jan 2023
Cited by 5 | Viewed by 3455
Abstract
The paper presents the identification process of the mathematical model parameters of a differential-drive two-wheeled mobile robot. The values of the unknown parameters of the dynamics model were determined by carrying out their identification offline with the Levenberg-Marguardt method and identification online with [...] Read more.
The paper presents the identification process of the mathematical model parameters of a differential-drive two-wheeled mobile robot. The values of the unknown parameters of the dynamics model were determined by carrying out their identification offline with the Levenberg-Marguardt method and identification online with the Recursive least-squares method. The authors compared the parameters identified by offline and online methods and proposed to support the recursive least squares method with the results obtained by offline identification. The correctness of the identification process of the robot dynamics model parameters, and the operation of the control system was verified by comparing the desired trajectories and those obtained through simulation studies and laboratory tests. Then an analysis of errors defined as the difference between the values of reference position, orientation and velocity, and those obtained from simulations and laboratory tests was carried out. On itd basis, the quality of regulation in the proposed algorithm was determined. Full article
(This article belongs to the Special Issue Advanced Materials and Technologies for Aviation and Automotive Applications)
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