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MCA
Special Issues
Computational Applications in Engineering, Experimental Optimization, and Sustainable Manufacturing
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Computational Applications in Engineering, Experimental Optimization, and Sustainable Manufacturing

A special issue of Mathematical and Computational Applications (ISSN 2297-8747). This special issue belongs to the section "Engineering".

Deadline for manuscript submissions: closed (15 April 2023) | Viewed by 4815

Special Issue Editors

Dr. Fuat Kara

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Guest Editor
Department of Mechanical Engineering, Duzce University, Düzce 81620, Turkey
Interests: machining; sustainable manufacturing; cryogenic treatment; optimization
Special Issues, Collections and Topics in MDPI journals
Dr. Hargovind Soni

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Guest Editor
Department of Mechanical Engineering, National Institute of Technology, Delhi 110036, India
Interests: machining; MQL; advanced machining; TiNi-based shape memory
Prof. Dr. Uğur Köklü

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Guest Editor
Department of Mechanical Engineering, Karamanoğlu Mehmetbey University, Karaman 70200, Turkey
Interests: machining; sustainable manufacturing; cryogenic treatment; optimization
Dr. Onur Özbek

E-Mail Website
Guest Editor
Department of Machinery and Metal Technologies, Duzce University, Düzce 81850, Turkey
Interests: machining; cryogenic treatment; cryogenic machining; sustainable manufacturing

Special Issue Information

Dear Colleagues,

Sustainability has become a very important issue in terms of global warming, which is the biggest problem of our age. Sustainable manufacturing practices are one of the most significant environmental initiatives undertaken by the manufacturing industries to preserve the environment and improve the quality of human life while performing manufacturing activities. In terms of sustainable manufacturing, materials must be processed at the most optimum cutting parameters. For this reason, cutting tool selection and optimization of machining parameters are carried out. In addition, the correct selection of cutting fluids used as coolants has also become important. Today, the cryogenic cooling method and the minimum lubrication amount (MQL) cooling method are used as an alternative to conventional cooling fluids. Especially in the context of green manufacturing, the MQL technique has become prominent in recent years, and its usage is becoming widespread. Among the main features of the MQL technique are that it reduces the cutting zone temperature and the amount of lubrication needed to reduce friction in the cutting zone. In the cryogenic cooling method, liquid nitrogen is used as a cooling liquid to reduce the temperature in the cutting zone. Different optimization techniques such as the Taguchi method, artificial neural networks, response surface methodology, fuzzy logic, and genetic algorithm can be applied to experimental results to determine optimal processing conditions with fewer experiments.

In this Special Issue, we aim to publish articles on “Sustainable Manufacturing Computational Applications in Engineering and Optimization Techniques”. Likewise, we hope to attract review articles describing the current state of the technology.

Potential topics to be covered:

  1. Computational applications in engineering;
  2. Sustainable and green manufacturing;
  3. Sustainable optimization;
  4. Mechanical behaviors of materials: tensile, fatigue, residual stress, and other mechanical characteristics);
  5. Cryogenic machining and cryogenic treatment;
  6. Minimum quantity lubrication (MQL);
  7. Optimization techniques (machine learning, Taguchi analyses, response surface method, regression, etc.;
  8. Artificial neural networks (ANN), finite element modeling (FEM);
  9. Additive manufacturing.

Dr. Fuat Kara
Dr. Hargovind Soni
Prof. Dr. Uğur Köklü
Dr. Onur Özbek
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. Mathematical and Computational Applications 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 1400 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.

Published Papers (3 papers)

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Research

12 pages, 1344 KiB  
Article
Effect of Chrome and Vanadium on the Behavior of Hydrogen and Helium in Tungsten
by Meicong Li, Zheng Zhang, Yangyang Li, Qiang Zhao, Mei Huang and Xiaoping Ouyang
Math. Comput. Appl. 2023, 28(4), 81; https://doi.org/10.3390/mca28040081 - 03 Jul 2023
Viewed by 964
Abstract
Tungsten is a promising material for nuclear fusion reactors, but its performance can be degraded by the accumulation of hydrogen (H) and helium (He) isotopes produced by nuclear reactions. This study investigates the effect of chrome (Cr) and vanadium (V) on the behavior [...] Read more.
Tungsten is a promising material for nuclear fusion reactors, but its performance can be degraded by the accumulation of hydrogen (H) and helium (He) isotopes produced by nuclear reactions. This study investigates the effect of chrome (Cr) and vanadium (V) on the behavior of hydrogen and helium in tungsten (W) using first-principles calculations. The results show W becomes easier to process after adding Cr and V. Stability improves after adding V. Adding Cr negatively impacts H and He diffusion in W, while V promotes it. There is attraction between H and Cr or H and V for distances over 1.769 Å but repulsion below 1.583 Å. There is always attraction between He and Cr or V. The attraction between vacancies and He is stronger than that between He and Cr or V. There is no clear effect on H when vacancies and Cr or V coexist in W. Vacancies can dilute the effects of Cr and V on H and He in W. Full article
(This article belongs to the Special Issue Computational Applications in Engineering, Experimental Optimization, and Sustainable Manufacturing)
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18 pages, 4298 KiB  
Article
Applicability of Extreme Vertices Design in the Compositional Optimization of 3D-Printed Lightweight High-Entropy-Alloy/B4C/ZrO2/Titanium Trihybrid Aero-Composite
by Abayomi Adewale Akinwande, Dimitry Moskovskikh, Elena Romanovskaia, Oluwatosin Abiodun Balogun, J. Pradeep Kumar and Valentin Romanovski
Math. Comput. Appl. 2023, 28(2), 54; https://doi.org/10.3390/mca28020054 - 03 Apr 2023
Cited by 4 | Viewed by 1611
Abstract
Recent studies have shown the benefits of utilizing ceramic particles as reinforcement in metal alloys; nevertheless, certain drawbacks, including loss of ductility, embrittlement, and decreases in toughness, have been noted. For the objective of obtaining balanced performance, experts have suggested the addition of [...] Read more.
Recent studies have shown the benefits of utilizing ceramic particles as reinforcement in metal alloys; nevertheless, certain drawbacks, including loss of ductility, embrittlement, and decreases in toughness, have been noted. For the objective of obtaining balanced performance, experts have suggested the addition of metal particles as supplement to the ceramic reinforcement. Consequently, high-performance metal hybrid composites have been developed. However, achieving the optimal mix for the reinforcement combination with regards to the optimal performance of developed composite remains a challenge. This research aimed to determine the optimal mixture of Al50Cu10Sn5Mg20Zn10Ti5 lightweight high-entropy alloy (LHEA), B4C, and ZrO2 for the fabrication of trihybrid titanium composites via direct laser deposition. A mixture design was involved in the experimental design, and experimental data were modeled and optimized to achieve the optimal performance of the trihybrid composite. The ANOVA, response surface plots, and ternary maps analyses of the experimental results revealed that various combinations of reinforcement particles displayed a variety of response trends. Moreover, the analysis showed that these reinforcements significantly contributed to the magnitudes and trends of the responses. The generated models were competent for predicting response, and the best formulation consisted of 8.4% LHEA, 1.2% B4C, and 2.4% ZrO2. Full article
(This article belongs to the Special Issue Computational Applications in Engineering, Experimental Optimization, and Sustainable Manufacturing)
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13 pages, 10586 KiB  
Article
Experimental Study of Coupled Torsional and Lateral Vibration of Vertical Rotor-to-Stator Contact in an Inviscid Fluid
by Desejo Filipeson Sozinando, Bernard Xavier Tchomeni and Alfayo Anyika Alugongo
Math. Comput. Appl. 2023, 28(2), 44; https://doi.org/10.3390/mca28020044 - 20 Mar 2023
Viewed by 1656
Abstract
Diagnosis of faults in a rotor system operating in a fluid is a complex task in the field of rotating machinery. In an ideal scenario, a forced shutdown due to rotor-stator contact failure would necessitate the replacement of the rotor or stator. However, [...] Read more.
Diagnosis of faults in a rotor system operating in a fluid is a complex task in the field of rotating machinery. In an ideal scenario, a forced shutdown due to rotor-stator contact failure would necessitate the replacement of the rotor or stator. However, factors such as time constraints, economic considerations, and the aging of infrastructure make it imprudent to abruptly shut down machinery that can still be safe to operate. The purpose of this paper is to present an experimental study that validates the theoretical results of the dynamic behavior and friction detection using the wavelet synchrosqueezing transformation (WSST) method for recurrent rotor-stator contacts in a fluid environment, as presented in a previous study. The investigation focused on the analysis of whirl orbits, shaft deflection, and fluctuation frequency during passage through critical speeds. The WSST method was used to decompose the dynamic responses of the rotor in the supercritical speed zone into several supercomponents. The variation of the high-frequency component was studied based on the fluctuation of the instantaneous frequency (IF) technique. Additionally, the fast Fourier transform (FFT) method, in conjunction with the WSST technique, was used to calculate the variation in the amplitude of high-order frequencies in the vibration signal spectrum. The experimental study revealed that the split in resonance caused by rubbing effects is reduced when the rotor and stator interact with an inviscid fluid. However, despite the effects of elasticity and fluid boundaries generating self-excitation at low frequencies and uneven motion due to stator clearance, the experimental results were consistent with the theoretical analysis, demonstrating the effectiveness of the contact detection method based on WSST. Full article
(This article belongs to the Special Issue Computational Applications in Engineering, Experimental Optimization, and Sustainable Manufacturing)
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