Pub Date : 2024-06-01DOI: 10.12913/22998624/186361
Grzegorz Pająk
A method of trajectory planning with regards to joint velocity and acceleration constraints for industrial 6DOF manipulator is presented. The task of the robot is to move to specified location in the workspace passing through intermediate waypoints. The proposed algorithm can be used to plan the task of the robot by autonomous systems in smart factories eliminating human participation in the robot programing process. Opposite to similar approaches it does not assume the type of function describing the motion of the robot. The trajectories generated using the proposed approach are smooth and provide smooth velocities and continuous joint accelerations. The motion is planned in such a way to fulfill joint velocity and acceleration constraints. Fulfillment of velocity limitations is accomplished by perturbing the manipulator motion close to velocity limits. To satisfy acceleration constraints a trajectory scaling approach carried out in limited periods of time is used. The results of the research are illustrated by simulations and experiments, in which an analysis of the method of performing robot tasks carried out using built-in algorithms and presented methods are performed.
{"title":"New Approach to Planning the Complex Movements of 6-DOF Industrial Robot Subjected to Acceleration Constraints","authors":"Grzegorz Pająk","doi":"10.12913/22998624/186361","DOIUrl":"https://doi.org/10.12913/22998624/186361","url":null,"abstract":"A method of trajectory planning with regards to joint velocity and acceleration constraints for industrial 6DOF manipulator is presented. The task of the robot is to move to specified location in the workspace passing through intermediate waypoints. The proposed algorithm can be used to plan the task of the robot by autonomous systems in smart factories eliminating human participation in the robot programing process. Opposite to similar approaches it does not assume the type of function describing the motion of the robot. The trajectories generated using the proposed approach are smooth and provide smooth velocities and continuous joint accelerations. The motion is planned in such a way to fulfill joint velocity and acceleration constraints. Fulfillment of velocity limitations is accomplished by perturbing the manipulator motion close to velocity limits. To satisfy acceleration constraints a trajectory scaling approach carried out in limited periods of time is used. The results of the research are illustrated by simulations and experiments, in which an analysis of the method of performing robot tasks carried out using built-in algorithms and presented methods are performed.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"60 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231295","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 : 2024-06-01DOI: 10.12913/22998624/187007
Dominika Mikušová, Zbigniew Suchorab, Magdalena Paśnikowska-Łukaszuk, Jacek Zaburko, Anton Trnik
{"title":"Applying the Machine Learning Method to Improve Calibration Quality of TDR Measuring Technique","authors":"Dominika Mikušová, Zbigniew Suchorab, Magdalena Paśnikowska-Łukaszuk, Jacek Zaburko, Anton Trnik","doi":"10.12913/22998624/187007","DOIUrl":"https://doi.org/10.12913/22998624/187007","url":null,"abstract":"","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"13 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141235598","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 : 2024-06-01DOI: 10.12913/22998624/186362
Przemysław Połaski, D. Golański, P. Kołodziejczak, Anna Pakuła
Intensive research is currently being conducted on wire arc additive manufacturing (WAAM) processes. Previous studies have demonstrated the impact of current parameters on altering the structure and properties of 316L stain - less steel. However, there is a lack of comprehensive information in the literature regarding the influence of elec - trode extension length (contact to tube distance) on changes in the structure and geometry of parts made of 316L steel using the cold metal transfer (CMT) method. This parameter was often assumed to be constant in research experiments. The study aimed to determine how the length of the electrode extension affects the geometric prop - erties of steel walls produced in the WAAM CMT additive manufacturing process. The experiment used 316LSi stainless steel to build 3D structures in the shape of straight walls. The chosen shape of the parts yielded the most benefits for preparing samples from the resulting structures for destructive testing. The research demonstrated that the length of the electrode extension is a crucial parameter in the additive manufacturing process of structures using the WAAM method. Modifying the electrode extension length in the WAAM process with a CMT machine impacts the bead geometry and, consequently, the overall model geometry. A 6 mm increase in the electrode exten - sion length resulted in a model that was over 8 mm taller, despite using the same number of layers.
{"title":"Effect of the Electrode Extension on the Geometry of Parts Made of 316LSi Steel by \u0000Wire Arc Additive Manufacturing Method (WAAM)","authors":"Przemysław Połaski, D. Golański, P. Kołodziejczak, Anna Pakuła","doi":"10.12913/22998624/186362","DOIUrl":"https://doi.org/10.12913/22998624/186362","url":null,"abstract":"Intensive research is currently being conducted on wire arc additive manufacturing (WAAM) processes. Previous studies have demonstrated the impact of current parameters on altering the structure and properties of 316L stain - less steel. However, there is a lack of comprehensive information in the literature regarding the influence of elec - trode extension length (contact to tube distance) on changes in the structure and geometry of parts made of 316L steel using the cold metal transfer (CMT) method. This parameter was often assumed to be constant in research experiments. The study aimed to determine how the length of the electrode extension affects the geometric prop - erties of steel walls produced in the WAAM CMT additive manufacturing process. The experiment used 316LSi stainless steel to build 3D structures in the shape of straight walls. The chosen shape of the parts yielded the most benefits for preparing samples from the resulting structures for destructive testing. The research demonstrated that the length of the electrode extension is a crucial parameter in the additive manufacturing process of structures using the WAAM method. Modifying the electrode extension length in the WAAM process with a CMT machine impacts the bead geometry and, consequently, the overall model geometry. A 6 mm increase in the electrode exten - sion length resulted in a model that was over 8 mm taller, despite using the same number of layers.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"8 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141228969","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 : 2024-06-01DOI: 10.12913/22998624/186012
Li Heng, Wang Nan, Xingyu Teng, Chai Zhen, Xiaoyong Zhu, Yucheng Wu
This study optimized the integrated die-casting of an aluminum alloy longitudinal beam and tower component using no heat-treated aluminum alloy. Leveraging material properties and part geometry, a pouring system was designed and refined through mold flow analysis. This optimized the velocity, temperature distribution, and air entrapment to reduce defects like shrinkage porosity. The optimized pouring parameters were 695 °C melt temperature, 210 °C initial mold temperature, and 4.9 m/s shot speed. This reduced shrinkage porosity by 10.4% versus the original de-sign. Die-casting trials with the optimized pouring system produced defect-free castings. The critical load-bearing section of the die casting had a yield strength of 184 MPa and elongation of 10.9%, which can meet the production requirements. In summary, based on the optimization of pouring system by mold flow analysis, by developing the integrated die casting process for aluminum alloy, not only are the defects eliminated, but also the castings with sufficient mechanical properties are produced.
本研究优化了铝合金纵梁和塔架部件的一体化压铸工艺，无需使用热处理铝合金。利用材料特性和零件几何形状，设计了浇注系统，并通过模流分析加以改进。这优化了速度、温度分布和空气截留，以减少收缩气孔等缺陷。优化后的浇注参数为 695 °C 熔体温度、210 °C 初始模具温度和 4.9 m/s 的注射速度。与最初的脱模相比，收缩气孔减少了 10.4%。使用优化浇注系统进行的压铸试验生产出了无缺陷铸件。压铸件关键承载部分的屈服强度为 184 兆帕，伸长率为 10.9%，可以满足生产要求。总之，在通过模流分析优化浇注系统的基础上，通过开发铝合金一体化压铸工艺，不仅消除了缺陷，还生产出了具有足够机械性能的铸件。
{"title":"Design and Optimization of Casting System for Integrated Longitudinal Beam and Tower Package Based on Al-Si Alloy","authors":"Li Heng, Wang Nan, Xingyu Teng, Chai Zhen, Xiaoyong Zhu, Yucheng Wu","doi":"10.12913/22998624/186012","DOIUrl":"https://doi.org/10.12913/22998624/186012","url":null,"abstract":"This study optimized the integrated die-casting of an aluminum alloy longitudinal beam and tower component using no heat-treated aluminum alloy. Leveraging material properties and part geometry, a pouring system was designed and refined through mold flow analysis. This optimized the velocity, temperature distribution, and air entrapment to reduce defects like shrinkage porosity. The optimized pouring parameters were 695 °C melt temperature, 210 °C initial mold temperature, and 4.9 m/s shot speed. This reduced shrinkage porosity by 10.4% versus the original de-sign. Die-casting trials with the optimized pouring system produced defect-free castings. The critical load-bearing section of the die casting had a yield strength of 184 MPa and elongation of 10.9%, which can meet the production requirements. In summary, based on the optimization of pouring system by mold flow analysis, by developing the integrated die casting process for aluminum alloy, not only are the defects eliminated, but also the castings with sufficient mechanical properties are produced.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"36 28","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141232833","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 : 2024-06-01DOI: 10.12913/22998624/186607
K. Falkowicz, Michał Kuciej, Łukasz Świech
This study investigates the influence of temperature variations on the buckling properties of thin-walled omega-pro - files fabricated from carbon-epoxy composite materials. Utilizing a MTS testing machine, compression tests were conducted on these profiles at temperatures ranging from -20°C to 80°C, in 20°C increments. The primary objective was to assess how temperature fluctuations impact the buckling load and load-bearing capacity of these composite profiles under axial compression. The experimental setup allowed for precise measurement of load-displacement and load-deflection characteristics, and the critical load at which buckling initiation occurred. Observations revealed that the buckling resistance of the profiles exhibited a complex dependence on temperature. At lower temperatures, the composite material demonstrated enhanced stiffness and strength, marginally increasing buckling resistance. Conversely, at elevated temperatures, a noticeable degradation in mechanical properties was observed, leading to a reduced buckling load and altered failure modes. To complement the experimental findings, a comprehensive finite element (FE) analysis was conducted for sample in room temperature. The FE model, developed to replicate the experimental conditions closely, employed an eigenvalue-based approach to predict the buckling initiation and progression accurately. The presented results are the results of only preliminary tests and they will be expand about more samples number as well as to determine material properties for various temperatures.
{"title":"Temperature Effect on Buckling Properties of Thin-Walled Composite Profile Subjected to Axial Compression","authors":"K. Falkowicz, Michał Kuciej, Łukasz Świech","doi":"10.12913/22998624/186607","DOIUrl":"https://doi.org/10.12913/22998624/186607","url":null,"abstract":"This study investigates the influence of temperature variations on the buckling properties of thin-walled omega-pro - files fabricated from carbon-epoxy composite materials. Utilizing a MTS testing machine, compression tests were conducted on these profiles at temperatures ranging from -20°C to 80°C, in 20°C increments. The primary objective was to assess how temperature fluctuations impact the buckling load and load-bearing capacity of these composite profiles under axial compression. The experimental setup allowed for precise measurement of load-displacement and load-deflection characteristics, and the critical load at which buckling initiation occurred. Observations revealed that the buckling resistance of the profiles exhibited a complex dependence on temperature. At lower temperatures, the composite material demonstrated enhanced stiffness and strength, marginally increasing buckling resistance. Conversely, at elevated temperatures, a noticeable degradation in mechanical properties was observed, leading to a reduced buckling load and altered failure modes. To complement the experimental findings, a comprehensive finite element (FE) analysis was conducted for sample in room temperature. The FE model, developed to replicate the experimental conditions closely, employed an eigenvalue-based approach to predict the buckling initiation and progression accurately. The presented results are the results of only preliminary tests and they will be expand about more samples number as well as to determine material properties for various temperatures.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"99 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141234441","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 : 2024-06-01DOI: 10.12913/22998624/186745
P. Bałon, E. Rejman, B. Kiełbasa, R. Smusz, Grzegorz Szeliga
Demand for bent pipe profiles in various industrial sectors is increasing due to considerations necessitating light - weight construction, safety, as well as space and cost savings. Lightweight construction is becoming increasingly important for economic and ecological reasons. This can be seen in the automotive and aerospace industries, as well as in civil engineering, where curved structures are often required. In order to reduce the weight of the aircraft, the aviation industry often uses spatial truss structures with bent elements. The challenge is to meet all of the stringent requirements regarding design, safety, structure, size, cost, etc., without compromising a structure’s stiffness. Profiles with complicated cross-sections and so-called tailored tubes are increasingly used in the production of automotive and aircraft structures (General Aviation). Pipe and profile bending technologies are constantly being improved upon to meet the growing expectations of customers and ensure greater process efficiency. Currently, efforts are being made to increase the level of automation in this area by combining the functionality of modern bending machines with the capabilities of industrial robots. CNC bending machines currently dominate the industrial pipe bending process. A technologically advanced bending machine allows for the production of increasingly complex shapes and profiles.
{"title":"The Process of Bending Pipes for Components of Aircraft Frames And Trusses","authors":"P. Bałon, E. Rejman, B. Kiełbasa, R. Smusz, Grzegorz Szeliga","doi":"10.12913/22998624/186745","DOIUrl":"https://doi.org/10.12913/22998624/186745","url":null,"abstract":"Demand for bent pipe profiles in various industrial sectors is increasing due to considerations necessitating light - weight construction, safety, as well as space and cost savings. Lightweight construction is becoming increasingly important for economic and ecological reasons. This can be seen in the automotive and aerospace industries, as well as in civil engineering, where curved structures are often required. In order to reduce the weight of the aircraft, the aviation industry often uses spatial truss structures with bent elements. The challenge is to meet all of the stringent requirements regarding design, safety, structure, size, cost, etc., without compromising a structure’s stiffness. Profiles with complicated cross-sections and so-called tailored tubes are increasingly used in the production of automotive and aircraft structures (General Aviation). Pipe and profile bending technologies are constantly being improved upon to meet the growing expectations of customers and ensure greater process efficiency. Currently, efforts are being made to increase the level of automation in this area by combining the functionality of modern bending machines with the capabilities of industrial robots. CNC bending machines currently dominate the industrial pipe bending process. A technologically advanced bending machine allows for the production of increasingly complex shapes and profiles.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"33 49","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233140","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 : 2024-06-01DOI: 10.12913/22998624/186473
Kuba Rosłaniec, P. Różyło
The purpose of the research was to analyze the experimental-numerical influence of the type of cross-section on the stability of thin-walled composite columns with closed (rectangular) cross-sections. The subject of the investigation was thin-walled composite structures made of CFRP composite (carbon fiber reinforced polymer), characterized by a closed rectangular cross-section shape of the profile and a identical ply configuration. In this study, experimental and numerical investigations of axially compressed columns were performed to determine the values of buckling loads and buckling forms. Experimental investigations were performed using a universal testing machine with an optical deformation measurement system. In parallel with the experimental tests, numerical simulations were made using the Finite Element Method (FEM). The numerical studies conducted using dedicated numerical models and the experimental studies made it possible to carry out a thorough analysis of the impact of the cross-sectional shape on the buckling phenomenon of the structure. The novelty of the present paper is the use of interdisciplinary testing methods to compare the effect of cross-sectional geometry on the stability of thin-walled composite columns.
{"title":"Stability of Thin-Walled Composite Structures with Closed Sections Under Compression","authors":"Kuba Rosłaniec, P. Różyło","doi":"10.12913/22998624/186473","DOIUrl":"https://doi.org/10.12913/22998624/186473","url":null,"abstract":"The purpose of the research was to analyze the experimental-numerical influence of the type of cross-section on the stability of thin-walled composite columns with closed (rectangular) cross-sections. The subject of the investigation was thin-walled composite structures made of CFRP composite (carbon fiber reinforced polymer), characterized by a closed rectangular cross-section shape of the profile and a identical ply configuration. In this study, experimental and numerical investigations of axially compressed columns were performed to determine the values of buckling loads and buckling forms. Experimental investigations were performed using a universal testing machine with an optical deformation measurement system. In parallel with the experimental tests, numerical simulations were made using the Finite Element Method (FEM). The numerical studies conducted using dedicated numerical models and the experimental studies made it possible to carry out a thorough analysis of the impact of the cross-sectional shape on the buckling phenomenon of the structure. The novelty of the present paper is the use of interdisciplinary testing methods to compare the effect of cross-sectional geometry on the stability of thin-walled composite columns.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"79 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231031","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 : 2024-06-01DOI: 10.12913/22998624/185505
A. Yousfi, Lahcene Bellahcene, Faris Alqurashi, Djamel Sahel, Mohamed Teggar, Abdelghani Laouer, Müslüm Arıcı, M. Kchaou
Pin fins have the potential to improve the thermal performance of various engineering devices. Modified pin fins could further increase their thermal performance in a passive way at lower cost. This study is aimed at numerically investigating the thermal performance of trenched hemispherical pin fins heat sink (THPFHS) and the influence of parameters including the trench number (N = 1, 3 and 5) and thickness (e = 1 to 5 mm). The simulations were performed using a computational fluid dynamics (CFD) software considering turbulent air flow conditions. Results showed that the use of aluminum fins fitted with one trench in the middle of the hemispherical pin fin considerably increased the local heat transfer. Furthermore, all studied configurations show high thermal performance factor (HTPF) compared with the conventional cylindrical pin fins heat sink (CPFHS). For this new configuration (THPFHS), Nu increases by 45% while the thermal resistance reduces by 42%, compared to the baseline case. On the other hand, this improved performance results in 50% pressure drop penalty. Moreover, the obtained results showed a significant improvement in the performance mainly at high Re.
{"title":"Effect of Trenched Hemispherical Pin Fins on Cooling Performance of Heat Sink","authors":"A. Yousfi, Lahcene Bellahcene, Faris Alqurashi, Djamel Sahel, Mohamed Teggar, Abdelghani Laouer, Müslüm Arıcı, M. Kchaou","doi":"10.12913/22998624/185505","DOIUrl":"https://doi.org/10.12913/22998624/185505","url":null,"abstract":"Pin fins have the potential to improve the thermal performance of various engineering devices. Modified pin fins could further increase their thermal performance in a passive way at lower cost. This study is aimed at numerically investigating the thermal performance of trenched hemispherical pin fins heat sink (THPFHS) and the influence of parameters including the trench number (N = 1, 3 and 5) and thickness (e = 1 to 5 mm). The simulations were performed using a computational fluid dynamics (CFD) software considering turbulent air flow conditions. Results showed that the use of aluminum fins fitted with one trench in the middle of the hemispherical pin fin considerably increased the local heat transfer. Furthermore, all studied configurations show high thermal performance factor (HTPF) compared with the conventional cylindrical pin fins heat sink (CPFHS). For this new configuration (THPFHS), Nu increases by 45% while the thermal resistance reduces by 42%, compared to the baseline case. On the other hand, this improved performance results in 50% pressure drop penalty. Moreover, the obtained results showed a significant improvement in the performance mainly at high Re.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"46 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141232623","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 : 2024-06-01DOI: 10.12913/22998624/186545
Anatolyi Hordieiev, Galyna Kalda, M. Pashechko, Andriy Hanzyuk, Vitaliy Tkachuk, Nazar Kostiuk
The paper presents the results of research into the influence of low-frequency sound and magnetic fields on the change in the properties of water and its purification in a vibrating machine with an eccentric drive, which allows obtaining a constant amplitude of oscillation when the frequency of oscillations of the drive is changed. A method and construc - tion of a vibrating machine for changing the properties of water and cleaning is proposed. Thanks to its reciprocating movement, and in the pulsation chamber and the nozzle, appropriate reactions take place. At certain oscillation fre - quencies, a cavitation cavity appears in the nozzle and the pulsation chamber, in which the process of splitting water molecules into active radicals takes place. At the same time, during the reciprocating movement of water through a non-magnetic nozzle, which is covered by permanent magnets, an additional effect of a variable magnetic field direc - tion is exerted on water, which strengthens the breaking of hydrogen bonds in water molecules. Visualization of the hydrocavitation process during operation of a vibrating machine with a transparent nozzle was studied. During the experiment, changes in water parameters were studied, i.e. changes in pH, changes in the oxidation-reduction poten - tial of treatment ORP and the total content of mineralization according to the TDS index with treatment time. The total concentration of dissolved salts decreases from 400 to 300 units, which also indicates an improvement in water quality. The rational frequency limits of the vibration drive of the machine are in the range from 18 to 23 Hz with an amplitude of oscillations of 0.002 m, and the ratio of its design parameters is determined: with a piston diameter of 0.1 m, it is recommended to use a diameter of the hole in the piston from 0.006 to 0.008 m.
{"title":"Study of the Influence of Cavitation and Magnetic Field on the Change of Water Properties and its Purification in a Vibrating Machine with Determination of Drive Modes","authors":"Anatolyi Hordieiev, Galyna Kalda, M. Pashechko, Andriy Hanzyuk, Vitaliy Tkachuk, Nazar Kostiuk","doi":"10.12913/22998624/186545","DOIUrl":"https://doi.org/10.12913/22998624/186545","url":null,"abstract":"The paper presents the results of research into the influence of low-frequency sound and magnetic fields on the change in the properties of water and its purification in a vibrating machine with an eccentric drive, which allows obtaining a constant amplitude of oscillation when the frequency of oscillations of the drive is changed. A method and construc - tion of a vibrating machine for changing the properties of water and cleaning is proposed. Thanks to its reciprocating movement, and in the pulsation chamber and the nozzle, appropriate reactions take place. At certain oscillation fre - quencies, a cavitation cavity appears in the nozzle and the pulsation chamber, in which the process of splitting water molecules into active radicals takes place. At the same time, during the reciprocating movement of water through a non-magnetic nozzle, which is covered by permanent magnets, an additional effect of a variable magnetic field direc - tion is exerted on water, which strengthens the breaking of hydrogen bonds in water molecules. Visualization of the hydrocavitation process during operation of a vibrating machine with a transparent nozzle was studied. During the experiment, changes in water parameters were studied, i.e. changes in pH, changes in the oxidation-reduction poten - tial of treatment ORP and the total content of mineralization according to the TDS index with treatment time. The total concentration of dissolved salts decreases from 400 to 300 units, which also indicates an improvement in water quality. The rational frequency limits of the vibration drive of the machine are in the range from 18 to 23 Hz with an amplitude of oscillations of 0.002 m, and the ratio of its design parameters is determined: with a piston diameter of 0.1 m, it is recommended to use a diameter of the hole in the piston from 0.006 to 0.008 m.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"9 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233592","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 : 2024-06-01DOI: 10.12913/22998624/185961
D. Kaczor, Krzysztof Bajer, A. Raszkowska-Kaczor, G. Domek, P. Szroeder
The bottleneck in the widespread use of carbon multiwall nanotube polymer composites is the lack of manufacturing technology that can be used on an industrial scale. In this article, we describe a two-step composite manufacturing technology based on screw extrusion that produces composites characterizing with good dispersion of carbon nanotube filler in polylactide matrix. The first stage involved the fabrication of highly filled masterbatches of 25 wt% of carbon nanotubes. In the second stage, by screw extrusion of the masterbatch mixture with neat polymer, we obtained homogeneous composites with the target filler concentration. The resulting composites with nanotube content ranging from 0.1 to 2 wt%. Mechanical tests including static tension, tensile strength, tensile modulus, three-point bending and impact strength has shown that optimal concentration of the carbon nanotube filler is ranged between 0.5 and 1 wt%. Samples were examined also by SEM, FTIR-ATR, DSC and MFR methods.
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