Pub Date : 2023-01-01DOI: 10.61552/jme.2023.02.005
Ivan Peko, Bogdan Nedić, Dejan Marić, Dragan Džunić, Tomislav Šolić, Mario Dragičević, Boris Crnokić, Matej Kljajo
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.
{"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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.02.003
Sudarshan Rao K.
This study aimed to assess the abrasive wear performance of a composite material made of carbon epoxy and graphite particles. The experiments were conducted on Abrasion Test rig and examined the weight loss of the composite material, taking into account the sliding distance and normal load. Taguchi method is employed to study the effect of process parameters on composite wear. Multiple regressions were utilized to establish a correlation between wear and wear parameters. The findings indicated that weight loss increased with higher applied loads, sliding distances, and weight fractions of graphite filler. Finally, the experimental results were validated through confirmation tests.
{"title":"Taguchi and Regression Analysis of Abrasive Wear Behavior of Carbon Epoxy Composite","authors":"Sudarshan Rao K.","doi":"10.61552/jme.2023.02.003","DOIUrl":"https://doi.org/10.61552/jme.2023.02.003","url":null,"abstract":"This study aimed to assess the abrasive wear performance of a composite material made of carbon epoxy and graphite particles. The experiments were conducted on Abrasion Test rig and examined the weight loss of the composite material, taking into account the sliding distance and normal load. Taguchi method is employed to study the effect of process parameters on composite wear. Multiple regressions were utilized to establish a correlation between wear and wear parameters. The findings indicated that weight loss increased with higher applied loads, sliding distances, and weight fractions of graphite filler. Finally, the experimental results were validated through confirmation tests.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"15 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":"135953146","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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.02.006
Alexey Smolin, Galina Eremina, Irina Martyshina
Dental implants are becoming an increasingly important part of modern dental treatment. Developing an optimal implant surface design can improve osseointegration. Promising to increase the rate of osseointegration is the use of external shock wave therapy, which has proven itself for the treatment of fractures, bone defects, and bone tissue regeneration during surgery and arthroplasty. This work aims at a numerical investigation of the effects of low-energy shock wave therapy of various ranges on the mechanical behaviour of bone tissues, taking into account the physiological characteristics in the area of dental implant placement. Modelling was carried out using the method of movable cellular automata. Using computer simulation, it was found that the conditions for the regeneration of bone tissues at the near-contact zone with the implant of the jaw segment are created by a shock wave with an intensity of greater than 0.1 mJ/mm2.
{"title":"Simulation of Mechanical Processes at the Contact Region of a Dental Implant with Bone Tissues Under Shock Wave Treatment","authors":"Alexey Smolin, Galina Eremina, Irina Martyshina","doi":"10.61552/jme.2023.02.006","DOIUrl":"https://doi.org/10.61552/jme.2023.02.006","url":null,"abstract":"Dental implants are becoming an increasingly important part of modern dental treatment. Developing an optimal implant surface design can improve osseointegration. Promising to increase the rate of osseointegration is the use of external shock wave therapy, which has proven itself for the treatment of fractures, bone defects, and bone tissue regeneration during surgery and arthroplasty. This work aims at a numerical investigation of the effects of low-energy shock wave therapy of various ranges on the mechanical behaviour of bone tissues, taking into account the physiological characteristics in the area of dental implant placement. Modelling was carried out using the method of movable cellular automata. Using computer simulation, it was found that the conditions for the regeneration of bone tissues at the near-contact zone with the implant of the jaw segment are created by a shock wave with an intensity of greater than 0.1 mJ/mm2.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"6 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":"135954654","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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.01.006
Gergana Milanova
The main purpose of this publication is to present the founding stages of the foundry industry and its fundamental importance to the engineering sector. The second focus is to examine the technology of casting in sand molds and more specifically those based on no-bake process(chemically hardening). The auxiliary materials used for the production of sand molds and their importance for the quality of the final part-casting are examined in detail. Special attention is paid to refractory coatings, and in particular those with graphite filler, because of their wide application. The main chemical parameters are presented and the need to study their geometric and tribological characteristics and their influence on the quality of manufactured castings is emphasized. Until now, the author of the publication has studied the micro hardness, roughness, friability and gas permeability of refractory coatings, for which parameters no previous information on similar tests has been found. The research carried out was financed under phd project No. 222ПД0005-05 – TU Sofia, Bulgaria.
{"title":"Foundry Coatings - Review","authors":"Gergana Milanova","doi":"10.61552/jme.2023.01.006","DOIUrl":"https://doi.org/10.61552/jme.2023.01.006","url":null,"abstract":"The main purpose of this publication is to present the founding stages of the foundry industry and its fundamental importance to the engineering sector. The second focus is to examine the technology of casting in sand molds and more specifically those based on no-bake process(chemically hardening). The auxiliary materials used for the production of sand molds and their importance for the quality of the final part-casting are examined in detail. Special attention is paid to refractory coatings, and in particular those with graphite filler, because of their wide application. The main chemical parameters are presented and the need to study their geometric and tribological characteristics and their influence on the quality of manufactured castings is emphasized. Until now, the author of the publication has studied the micro hardness, roughness, friability and gas permeability of refractory coatings, for which parameters no previous information on similar tests has been found. The research carried out was financed under phd project No. 222ПД0005-05 – TU Sofia, Bulgaria.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"83 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":"135952834","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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.01.005
Nikolaos Fountas, John Kechagias, Nikolaos Vaxevanidis
During last decades fused deposition modeling (FDM) has emerged as a widely applied additive manufacturing technology for numerous engineering applications. The present work investigates the effects of two independent variables during FDM fabrication of conventional polylactic acid (PLA) and organic biocompatible composite material with coconut flour (PLA/w) on mean surface roughness (Ra) of fabricated items. The parameter optimization adopts a customized response surface (RSM) design, based on an L9 orthogonal array. The independent variables investigated, were nozzle temperature, NT (oC) and layer thickness, LT (mm) whilst regression models for Ra concerning both materials; PLA and PLA/W, were developed to correlate the independent parameters. Proper analysis was preceded, based on response surface analysis through contour plots. The regression models were further utilized as objective functions to minimize Ra for both filament materials with the use of grey-wolf optimization genetic algorithm (GWO)
{"title":"Statistical Modeling and Optimization of Surface Roughness for PLA and PLA/Wood FDM Fabricated Items","authors":"Nikolaos Fountas, John Kechagias, Nikolaos Vaxevanidis","doi":"10.61552/jme.2023.01.005","DOIUrl":"https://doi.org/10.61552/jme.2023.01.005","url":null,"abstract":"During last decades fused deposition modeling (FDM) has emerged as a widely applied additive manufacturing technology for numerous engineering applications. The present work investigates the effects of two independent variables during FDM fabrication of conventional polylactic acid (PLA) and organic biocompatible composite material with coconut flour (PLA/w) on mean surface roughness (Ra) of fabricated items. The parameter optimization adopts a customized response surface (RSM) design, based on an L9 orthogonal array. The independent variables investigated, were nozzle temperature, NT (oC) and layer thickness, LT (mm) whilst regression models for Ra concerning both materials; PLA and PLA/W, were developed to correlate the independent parameters. Proper analysis was preceded, based on response surface analysis through contour plots. The regression models were further utilized as objective functions to minimize Ra for both filament materials with the use of grey-wolf optimization genetic algorithm (GWO)","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"292 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":"135953144","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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.01.004
Olexiy Sagalovicha, Viktor Popov, Vladislav Sagalovich, Stanislav Dudnik, Oleksandr Оlijnyk
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.
{"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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.01.003
Ryota Ishii, Reo Miwa, Norifumi Miyanaga, Jun Tomioka
The effects of three types of dimples with different internal structures on the fluid lubrication characteristics of thrust bearings were investigated. The load-carrying capacity and the frictional torque were measured. The measurements were performed with a fixed constant film thickness. The behaviours of cavitation bubbles occurred within the dimple were observed through the rotating glass plate. Three types of internal structures of dimples were tested: cylindrical, sphere and conical. The measurement results were simulated by the Reynolds equation. As the results, the load-carrying capacity increased as the rotational speed increased. The cylindrical internal structure built up the largest pressure at the trailing edge, and consequently the largest load-carrying capacity. The frictional torque also increased with increasing the rotational speed. However, the effect of the internal structure on the frictional torque was not significant.
{"title":"Effect of Cross-Sectional Profile of Circular Dimples on Hydrodynamic Lubrication Characteristics of Thrust Bearings","authors":"Ryota Ishii, Reo Miwa, Norifumi Miyanaga, Jun Tomioka","doi":"10.61552/jme.2023.01.003","DOIUrl":"https://doi.org/10.61552/jme.2023.01.003","url":null,"abstract":"The effects of three types of dimples with different internal structures on the fluid lubrication characteristics of thrust bearings were investigated. The load-carrying capacity and the frictional torque were measured. The measurements were performed with a fixed constant film thickness. The behaviours of cavitation bubbles occurred within the dimple were observed through the rotating glass plate. Three types of internal structures of dimples were tested: cylindrical, sphere and conical. The measurement results were simulated by the Reynolds equation. As the results, the load-carrying capacity increased as the rotational speed increased. The cylindrical internal structure built up the largest pressure at the trailing edge, and consequently the largest load-carrying capacity. The frictional torque also increased with increasing the rotational speed. However, the effect of the internal structure on the frictional torque was not significant.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"294 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":"135954016","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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.01.002
Sergey Vasiliy Fedorov
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).
{"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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.02.004
Jelena Stanojković, Miloš Madić, Dragan Lazarević
This paper presents a review of the modeling methods which are widely used for empirical modeling of turning process. The review considered the scientific publications from renowned scientific resource bases from 2018 until the end of 2022. The main focus was to identify the applied empirical methods, considered turning process performances, turning process parameters, material of cutting tool and workpiece, type of turning operation (single or multi pass turning) and a number of performed experimental trials upon which mathematical model was developed. Research in this area provides ready-made information in one place that can be very useful to future researchers who decide to research in this direction, i.e., possibilities for modeling certain turning process performances as well as selection of process parameters and modeling method.
{"title":"Empirical Modeling Methods of Turning Process: A Review","authors":"Jelena Stanojković, Miloš Madić, Dragan Lazarević","doi":"10.61552/jme.2023.02.004","DOIUrl":"https://doi.org/10.61552/jme.2023.02.004","url":null,"abstract":"This paper presents a review of the modeling methods which are widely used for empirical modeling of turning process. The review considered the scientific publications from renowned scientific resource bases from 2018 until the end of 2022. The main focus was to identify the applied empirical methods, considered turning process performances, turning process parameters, material of cutting tool and workpiece, type of turning operation (single or multi pass turning) and a number of performed experimental trials upon which mathematical model was developed. Research in this area provides ready-made information in one place that can be very useful to future researchers who decide to research in this direction, i.e., possibilities for modeling certain turning process performances as well as selection of process parameters and modeling method.","PeriodicalId":42984,"journal":{"name":"Journal of Materials and Engineering Structures","volume":"15 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":"135953699","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}
Pub Date : 2023-01-01DOI: 10.61552/jme.2023.01.001
Emilia Assenova, Evgenia Kozhoukharova
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.
{"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}
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