Journal of Materials and Engineering Structures最新文献_第2页

Artificial Intelligence Fuzzy Logic Modeling of Surface Roughness in Plasma Jet Cutting Process of Shipbuilding Aluminium Alloy 5083 船舶铝合金5083等离子射流切割表面粗糙度的人工智能模糊逻辑建模

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.02.005

Ivan Peko, Bogdan Nedić, Dejan Marić, Dragan Džunić, Tomislav Šolić, Mario Dragičević, Boris Crnokić, Matej Kljajo

{"title":"Artificial Intelligence Fuzzy Logic Modeling of Surface Roughness in Plasma Jet Cutting Process of Shipbuilding Aluminium Alloy 5083","authors":"Ivan Peko, Bogdan Nedić, Dejan Marić, Dragan Džunić, Tomislav Šolić, Mario Dragičević, Boris Crnokić, Matej Kljajo","doi":"10.61552/jme.2023.02.005","DOIUrl":"https://doi.org/10.61552/jme.2023.02.005","url":null,"abstract":"In this paper the influence of different process parameters on surface roughness responses in plasma jet cutting process was investigated. Experimentations were conducted on shipbuilding aluminium 5083 sheet thickness 8 mm. Experimental work was performed according to Taguchi L27 orthogonal array by varying four parameters such as gas pressure, cutting speed, arc current and cutting height. Due to complexity of manufacturing process and aim to cover wide experimental space few constraints regarding cutting area were defined. Surface roughness parameters Ra and Rz were analysed as cut quality responses. In order to define mathematical model that will be able to describe effects of process parameters on surface roughness artificial intelligence (AI) fuzzy logic (FL) technique was applied. After functional relations between input parameters and surface roughness responses were defined prediction accuracy of developed fuzzy logic model was checked by comparison between experimental and predicted data. Mean absolute percentage error (MAPE) as well as coefficient of determination (R2) were used as validation measures. Finally, optimal process conditions that lead to minimal surface roughness were defined by creating response surface plots.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135953441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Taguchi and Regression Analysis of Abrasive Wear Behavior of Carbon Epoxy Composite 碳-环氧复合材料磨粒磨损行为的田口与回归分析

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.02.003

Sudarshan Rao K.

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Simulation of Mechanical Processes at the Contact Region of a Dental Implant with Bone Tissues Under Shock Wave Treatment 冲击波治疗下牙种植体与骨组织接触区域机械过程的模拟

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.02.006

Alexey Smolin, Galina Eremina, Irina Martyshina

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Foundry Coatings - Review 铸造涂料-综述

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.01.006

Gergana Milanova

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Statistical Modeling and Optimization of Surface Roughness for PLA and PLA/Wood FDM Fabricated Items 聚乳酸和聚乳酸/木材FDM制成品表面粗糙度的统计建模与优化

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.01.005

Nikolaos Fountas, John Kechagias, Nikolaos Vaxevanidis

引用次数: 0

Working Out the Processes of Deposition “MetalMetal“ Multi-Layer Coatings (Cu-Mo, Cu-MoN, Cu-C) and Studying the Tribological Characteristics of Friction Pairs 研究了“金属-金属”多层涂层(Cu-Mo、Cu-MoN、Cu-C)的沉积工艺及摩擦副的摩擦学特性

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.01.004

Olexiy Sagalovicha, Viktor Popov, Vladislav Sagalovich, Stanislav Dudnik, Oleksandr Оlijnyk

{"title":"Working Out the Processes of Deposition “MetalMetal“ Multi-Layer Coatings (Cu-Mo, Cu-MoN, Cu-C) and Studying the Tribological Characteristics of Friction Pairs","authors":"Olexiy Sagalovicha, Viktor Popov, Vladislav Sagalovich, Stanislav Dudnik, Oleksandr Оlijnyk","doi":"10.61552/jme.2023.01.004","DOIUrl":"https://doi.org/10.61552/jme.2023.01.004","url":null,"abstract":"As part of the program to search for new materials with high characteristics according to Avinit vacuum-plasma technologies, based on the complex use of coating methods (CVD + PVD), stimulated by nonequilibrium low-temperature plasma, the technological parameters of applying tightly bonded high-quality multilayer and nano-layer \"metalmetal coatings\" were worked out:  metal PVD coatings of Mo, Cu;  multi-layer PVD coatings based on Cu-Mo-N;  multi-layer PVD coatings on the basis of (Cu-C) (with different carbon content). Studies of samples with coatings were performed (micro-grinding, coating hardness, determination of surface geometry after coating). The thickness of multilayer coatings is 1...2 microns. with coating hardness of 250-400 kg/mm2. The developed regimes ensure high adhesion and preservation of the hardness of steel DIN 1.2379 within the specified limits. Distortions of the geometry and roughness of the coated surfaces, compared to the condition before the coating, were not detected. Tribological tests of coated samples were carried out. All tested coatings were completely worn out when rubbing steel DIN 1.2379 at very low loads (max up to 300N, then the load did not increase). All coatings had a high coefficient of friction Kfr ≥ 0.15. The use of such coatings in tribocombinations with steel in the form of independent wear-resistant coatings is impractical. They can be considered as soft layers in the development of new structures of antifriction wear-resistant coatings to increase the performance of friction pairs in the \"coating-steel\" and \"coating-coating\" tribosystems.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135954333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Cross-Sectional Profile of Circular Dimples on Hydrodynamic Lubrication Characteristics of Thrust Bearings 圆凹窝截面对止推轴承流体动力润滑特性的影响

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.01.003

Ryota Ishii, Reo Miwa, Norifumi Miyanaga, Jun Tomioka

引用次数: 0

The Mystery and Clarity of Leonardo da Vinci's Coefficient of Friction 达芬奇的摩擦系数的神秘和清晰

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.01.002

Sergey Vasiliy Fedorov

{"title":"The Mystery and Clarity of Leonardo da Vinci's Coefficient of Friction","authors":"Sergey Vasiliy Fedorov","doi":"10.61552/jme.2023.01.002","DOIUrl":"https://doi.org/10.61552/jme.2023.01.002","url":null,"abstract":"The science of friction has been using the coefficient of friction as the main quantitative characteristic of the friction process for more than five centuries. The concept of the coefficient of friction as a characteristic of the resistance to the movement of rubbing surfaces in a hidden form was formulated by Leonardo da Vinci: \"Each rubbing body exerts a friction resistance equal to one quarter of its weight, provided that the flat plane is in contact with the polished surface\". Two centuries later, the coefficient of friction appeared explicitly, in the form of a formula, in the works of G. Amontons. It is clear that the coefficient of friction is a convenient friction parameter, easily determined in the experiment. However, what is the physical meaning of resistance to the movement of rubbing surfaces? Modern engineering believes that the coefficient of friction has no physical meaning. Thermodynamic analysis of the friction process is performed. The evolutionary patterns of the behavior of the friction contact are shown. A structural-energy interpretation of the logic of the coefficient of friction (resistance) is proposed: accumulation of potential energy of defects in the crystal structure of the deformable volume by friction contact. The static potential energy of the formed defects in the crystal structure of the contact is a measure of the decrease in the kinetic energy of the relative motion of the rubbing surfaces. Such a formulation of resistance to movement under friction has a deep physical and clear meaning for a scientist and engineer. The substantiation of Leonardo da Vinci's formulation of friction that the friction resistance should be equal to 0.25 is given. The interpretation of this rule is given for the case of friction in mechanisms (machines).","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135953409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Empirical Modeling Methods of Turning Process: A Review 车削过程的经验建模方法综述

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.02.004

Jelena Stanojković, Miloš Madić, Dragan Lazarević

引用次数: 0

Stress-State and Sliding Between Colliding Plates in the Subduction Zone 俯冲带碰撞板块间的应力状态与滑动

Journal of Materials and Engineering Structures Pub Date : 2023-01-01 DOI: 10.61552/jme.2023.01.001

Emilia Assenova, Evgenia Kozhoukharova

{"title":"Stress-State and Sliding Between Colliding Plates in the Subduction Zone","authors":"Emilia Assenova, Evgenia Kozhoukharova","doi":"10.61552/jme.2023.01.001","DOIUrl":"https://doi.org/10.61552/jme.2023.01.001","url":null,"abstract":"Understanding of friction is important for tribological processes ranging from engineering contact systems to the nonmechanical inorganic tribosystems of Earth’s seismo-tectonic zones. A common but little-studied case is the combination of interaction, sliding and counter-pressure (collision) between plates and rock blocks, which develops specific deformations and energy and material changes. Above friction processes depend on the geometry, the spatial relations between the crustal plates, their material, especially rheological properties, and the energy transformations. The subduction zone has been regarded as place of renewal processes of energy and material. The role of the intensive friction processes in the increase of temperature and pressure in the subduction zone is shown, and the resulting both internal, external deformations and material changes of the rock material. A hypothesis is presented for the formation of the so-called \"Deformation Arc\" observed in the Alps, the Chilean segment of the Andes and the Nepalese zone. A contribution to science represents the application of tribological principles in the interpretation of natural, in this case geotribological processes, which leads to mutual enrichment of both tribology and geology.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135952855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0