Pub Date : 2024-01-07DOI: 10.21608/jest.2024.334797
A. M. Atia, K. M. Atia, A. H. Badran
The established challenge in contemporary mechanical engineering lies in the enhancement of materials for applications involving wear. This study focuses on analyzing the wear mechanism of brake pads by employing epoxy reinforced with carbon fiber. The fabrication involved the lay-up process, and curing time reduction was achieved through elevated temperatures. The number of the carbon fiber layers examined was 2, 3, 4, 5 and 6. To investigate the wear rate characteristics of the carbon fiber composite (CFC), a pin-on-disc apparatus with varying rotational speeds, convertible to linear distance, was utilized. The results reveal that wear decreased when toughness increased. As the fiber content increased, wear decreased. Besides, the delamination of the carbon fibers and the separation of individual layers within the composite structure were the wear mechanism of the composites.
{"title":"TRIBOLOGICAL PROPERTIES OF WOVEN CARBON FIBRE COMPOSITE FOR WIND TURBINE BRAKE PADS","authors":"A. M. Atia, K. M. Atia, A. H. Badran","doi":"10.21608/jest.2024.334797","DOIUrl":"https://doi.org/10.21608/jest.2024.334797","url":null,"abstract":"The established challenge in contemporary mechanical engineering lies in the enhancement of materials for applications involving wear. This study focuses on analyzing the wear mechanism of brake pads by employing epoxy reinforced with carbon fiber. The fabrication involved the lay-up process, and curing time reduction was achieved through elevated temperatures. The number of the carbon fiber layers examined was 2, 3, 4, 5 and 6. To investigate the wear rate characteristics of the carbon fiber composite (CFC), a pin-on-disc apparatus with varying rotational speeds, convertible to linear distance, was utilized. The results reveal that wear decreased when toughness increased. As the fiber content increased, wear decreased. Besides, the delamination of the carbon fibers and the separation of individual layers within the composite structure were the wear mechanism of the composites.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"45 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535795","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 : 2024-01-01DOI: 10.21608/jest.2024.336522
S. Shaaban, S. Z. El-Abden, W. Y. Ali
The present study investigates the effect of filling epoxy resins by natural fibers on the generation of the electrostatic charge (ESC) from the dry sliding of rubber on the proposed composites. Fine fibers of wood, rice straw and palm were added as filling material in contents of 2.5, 5.0, 7.5, 10, 12.5, 15, 17.5 and 20 wt. %. The tested composites were loaded and slid on rubber at 2, 4, 6 and 8 N normal loads to measure ESC at contact/separation and sliding. It was found that filling epoxy composites by wood, palm and rice straw fibers reduced ESC generated after contact/separation and sliding. ESC decreased with increasing the content of the tested fibers that fill epoxy matrix. The optimal fiber content was ranging between 5.0 to 7.5 wt. %. It was observed that epoxy free from fibers displayed the highest ESC values. Besides, wood fibers showed lower ESC values than that observed for palm and rice straw fibers after contact/separation. While after sliding, palm displayed lower ESC than wood fibers. ESC generated on the rubber showed the same trend observed for the tested composites. The reduction of ESC can be explained on the position of wood and cellulose in the triboelectric series that suggests the contact of the tested fibers with rubber generates positive and negative ESC on the fibers and rubber surfaces respectively. As result of that, the values of ESC decreased. It is recommended to apply wood and palm fibers to fill epoxy to reduce the generation of ESC in floor material application.
{"title":"ELECTROSTATIC CHARGE GENERATED FROM SLIDING OF RUBBER ON EPOXY FILLED BY NATURAL FIBERS","authors":"S. Shaaban, S. Z. El-Abden, W. Y. Ali","doi":"10.21608/jest.2024.336522","DOIUrl":"https://doi.org/10.21608/jest.2024.336522","url":null,"abstract":"The present study investigates the effect of filling epoxy resins by natural fibers on the generation of the electrostatic charge (ESC) from the dry sliding of rubber on the proposed composites. Fine fibers of wood, rice straw and palm were added as filling material in contents of 2.5, 5.0, 7.5, 10, 12.5, 15, 17.5 and 20 wt. %. The tested composites were loaded and slid on rubber at 2, 4, 6 and 8 N normal loads to measure ESC at contact/separation and sliding. It was found that filling epoxy composites by wood, palm and rice straw fibers reduced ESC generated after contact/separation and sliding. ESC decreased with increasing the content of the tested fibers that fill epoxy matrix. The optimal fiber content was ranging between 5.0 to 7.5 wt. %. It was observed that epoxy free from fibers displayed the highest ESC values. Besides, wood fibers showed lower ESC values than that observed for palm and rice straw fibers after contact/separation. While after sliding, palm displayed lower ESC than wood fibers. ESC generated on the rubber showed the same trend observed for the tested composites. The reduction of ESC can be explained on the position of wood and cellulose in the triboelectric series that suggests the contact of the tested fibers with rubber generates positive and negative ESC on the fibers and rubber surfaces respectively. As result of that, the values of ESC decreased. It is recommended to apply wood and palm fibers to fill epoxy to reduce the generation of ESC in floor material application.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"104 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139639690","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 : 2024-01-01DOI: 10.21608/jest.2024.334766
R. A. Ibrahem
Triboelectric Generators (TEGs) and Nano-generators represent promising alternatives in the realm of energy gathering technologies. TEGs have the ability of energy conversion from diverse sources such as human motion, water flow, and wind waves into electrical energy by leveraging the triboelectric effect. The functionality of TEGs/TENGs relies on the synergy of triboelectric charges and electrostatic induction, allowing them to generate both output voltage and current. These innovative devices have garnered substantial attention due to their potential applications in wearable electronics, self-powered sensors, and portable devices. TEGs/TENGs boast several advantages over traditional energy harvesting technologies, including high efficiency, cost-effectiveness, and flexibility. Ongoing research in this field is dedicated to enhancing their performance, reliability, and scalability, with the goal of seamless integration into various applications. The present study delves into the impact of triboelectric layer materials and electrode materials on the performance of free-standing triboelectric generators under different conditions. The investigation involved three types of electrode layers (Aluminium, copper, and graphite) paired with four types of triboelectric layers (PP, PVC, PTFE, and Kapton) to assess the efficacy of the proposed Free-Standing TEGs (F-S TEGs). The findings reveal that the use of aluminium or graphite electrodes can significantly enhance the triboelectric performance of free-standing triboelectric generators comprising Kapton, PTFE, PP, or PVC triboelectric layers.
{"title":"PERFORMANCE EVALUATION OF FREE-STANDING TRIBOELECTRIC GENERATOR (F-S TEG) USING DIFFERENT ELECTRODES AND TRIBOELECTRIC LAYERS","authors":"R. A. Ibrahem","doi":"10.21608/jest.2024.334766","DOIUrl":"https://doi.org/10.21608/jest.2024.334766","url":null,"abstract":"Triboelectric Generators (TEGs) and Nano-generators represent promising alternatives in the realm of energy gathering technologies. TEGs have the ability of energy conversion from diverse sources such as human motion, water flow, and wind waves into electrical energy by leveraging the triboelectric effect. The functionality of TEGs/TENGs relies on the synergy of triboelectric charges and electrostatic induction, allowing them to generate both output voltage and current. These innovative devices have garnered substantial attention due to their potential applications in wearable electronics, self-powered sensors, and portable devices. TEGs/TENGs boast several advantages over traditional energy harvesting technologies, including high efficiency, cost-effectiveness, and flexibility. Ongoing research in this field is dedicated to enhancing their performance, reliability, and scalability, with the goal of seamless integration into various applications. The present study delves into the impact of triboelectric layer materials and electrode materials on the performance of free-standing triboelectric generators under different conditions. The investigation involved three types of electrode layers (Aluminium, copper, and graphite) paired with four types of triboelectric layers (PP, PVC, PTFE, and Kapton) to assess the efficacy of the proposed Free-Standing TEGs (F-S TEGs). The findings reveal that the use of aluminium or graphite electrodes can significantly enhance the triboelectric performance of free-standing triboelectric generators comprising Kapton, PTFE, PP, or PVC triboelectric layers.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"84 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139538725","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 : 2024-01-01DOI: 10.21608/jest.2024.334784
H. Gassour, G. A. Abu El-Magd, A. Mazen, A. M. Ibrahim
Nowadays, researchers are mostly drawn to green synthesis methods for nanoparticles because of their economic viability and environmental friendliness. Compared to the eco-green approaches developed in this work, traditional synthesis methods have one significant drawback: an extended reaction time. This work presents a novel method for producing silver nanoparticles (AgNPs), which is then used to reinforce Al6061 alloy matrix. For a novel microwave assisted green AgNPs synthesis optimization, many trials have been made to speed up the reaction time. The approach involves microwave-irradiating extracts of Aloe vera leaves. The produced nanoparticles were used to investigate tribological characteristics of the reinforced Al6061matrix composition. XRD analysis demonstrated improvements in particle sizes, particularly when utilizing the microwave-assisted approach, and confirmed the creation of AgNPs in the newly introduced green method. Indexing, inter atomic spacing, and specific surface area, were analyzed. Three samples, 0, 1, and 2 wt. % AgNPs contents, were manufactured using powder metallurgical technique for the purpose of investigating tribological enhancements. A dry wear test was performed monitoring many test parameters such as temperature, friction force, and humidity. The coefficient of friction (COF) and weight loss rates were evaluated in relation to the tribological properties. At different sliding speeds, the relationship between weight loss rates and AgNPs contents was examined, and substantial improved behavior was perceived.
{"title":"ECO-GREEN SILVER NANOPARTICLES PREPARATION, CHARACTERIZATION, AND TRIBOLOGICAL ENHANCEMENTS ON 6061AMC","authors":"H. Gassour, G. A. Abu El-Magd, A. Mazen, A. M. Ibrahim","doi":"10.21608/jest.2024.334784","DOIUrl":"https://doi.org/10.21608/jest.2024.334784","url":null,"abstract":"Nowadays, researchers are mostly drawn to green synthesis methods for nanoparticles because of their economic viability and environmental friendliness. Compared to the eco-green approaches developed in this work, traditional synthesis methods have one significant drawback: an extended reaction time. This work presents a novel method for producing silver nanoparticles (AgNPs), which is then used to reinforce Al6061 alloy matrix. For a novel microwave assisted green AgNPs synthesis optimization, many trials have been made to speed up the reaction time. The approach involves microwave-irradiating extracts of Aloe vera leaves. The produced nanoparticles were used to investigate tribological characteristics of the reinforced Al6061matrix composition. XRD analysis demonstrated improvements in particle sizes, particularly when utilizing the microwave-assisted approach, and confirmed the creation of AgNPs in the newly introduced green method. Indexing, inter atomic spacing, and specific surface area, were analyzed. Three samples, 0, 1, and 2 wt. % AgNPs contents, were manufactured using powder metallurgical technique for the purpose of investigating tribological enhancements. A dry wear test was performed monitoring many test parameters such as temperature, friction force, and humidity. The coefficient of friction (COF) and weight loss rates were evaluated in relation to the tribological properties. At different sliding speeds, the relationship between weight loss rates and AgNPs contents was examined, and substantial improved behavior was perceived.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"30 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139540361","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 : 2024-01-01DOI: 10.21608/jest.2024.334761
A. M. Hewidy, I. Sabry
The mechanical characteristics of composite materials play a crucial role in advancing technology. The present investigation employed the stir-casting method to produce hybrid aluminum matrix composites. Silicon carbide and aluminum oxide were selected as reinforcements in order to improve mechanical performance. Aluminum matrix composites (AMCs) were synthesized through the implementation of the stir-casting technique, incorporating varying volume percentages of aluminum oxide (10%, 15%, and 20%) with a consistent volume fraction of silicon carbide (15%) ang 10% graphite(G). The constructed AMCs were subjected to testing in order to evaluate their tensile strength (UTS), hardness (VHN), and wear rate (WR%). The wear rate was quantified across weights (10 N, 15 N, 20 N, and 25 N) and sliding velocities (0.3 m/s, 0.6 m/s, 0.9 m/s, and 1.3 m/s). In this study, a comparison was made between the mechanical characteristics of the manufactured aluminium matrix composites (AMCs) and those of the Al6063 alloy. The work outcomes indicated that the incorporation of silicon carbide and aluminium oxide resulted in a critical reinforcement of both the tensile strength and hardness properties. The tensile strength exhibited a notable rise, rising from an initial value of 590 MPa to a final value of 900 MPa. Similarly, the hardness of the material experienced an upward trend, ascending from an initial measurement of 70VHN to a final measurement of 90VHN. The wear rate exhibited a positive correlation with the magnitude of the applied load. Nevertheless, the variation in sliding velocity yielded distinct consequences. The velocity exhibited a quick increase until it attained a peak value of 0.9 m/s, then undergoing a sharp decline.
{"title":"MECHANICAL AND TRIBOLOGICAL CHARACTERISTICS OF STIR-CASTING Al2O3-SiC-Gr/Al6063 HYBRID COMPOSITE","authors":"A. M. Hewidy, I. Sabry","doi":"10.21608/jest.2024.334761","DOIUrl":"https://doi.org/10.21608/jest.2024.334761","url":null,"abstract":"The mechanical characteristics of composite materials play a crucial role in advancing technology. The present investigation employed the stir-casting method to produce hybrid aluminum matrix composites. Silicon carbide and aluminum oxide were selected as reinforcements in order to improve mechanical performance. Aluminum matrix composites (AMCs) were synthesized through the implementation of the stir-casting technique, incorporating varying volume percentages of aluminum oxide (10%, 15%, and 20%) with a consistent volume fraction of silicon carbide (15%) ang 10% graphite(G). The constructed AMCs were subjected to testing in order to evaluate their tensile strength (UTS), hardness (VHN), and wear rate (WR%). The wear rate was quantified across weights (10 N, 15 N, 20 N, and 25 N) and sliding velocities (0.3 m/s, 0.6 m/s, 0.9 m/s, and 1.3 m/s). In this study, a comparison was made between the mechanical characteristics of the manufactured aluminium matrix composites (AMCs) and those of the Al6063 alloy. The work outcomes indicated that the incorporation of silicon carbide and aluminium oxide resulted in a critical reinforcement of both the tensile strength and hardness properties. The tensile strength exhibited a notable rise, rising from an initial value of 590 MPa to a final value of 900 MPa. Similarly, the hardness of the material experienced an upward trend, ascending from an initial measurement of 70VHN to a final measurement of 90VHN. The wear rate exhibited a positive correlation with the magnitude of the applied load. Nevertheless, the variation in sliding velocity yielded distinct consequences. The velocity exhibited a quick increase until it attained a peak value of 0.9 m/s, then undergoing a sharp decline.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"17 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139540552","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 : 2024-01-01DOI: 10.21608/jest.2024.334785
W. M. Shewakh, Abdullah A. Faqihi, R. A. Ibrahem
Machining processes are the most common manufacturing operations for a wide range of products in our daily life produced from metallic, polymeric, and composite materials that undergo processing steps to be converted into final products. Turning operations for circular cross-section parts, drilling for cutting a rounded hole, and milling for cutting various configurations are the popular conventional machining processes for the manufacturing of different products. During the turning process, the work part is subjected to rotating speed as well as cutting force from the single point cutting tool which generates high friction forces between the pairs of contact surfaces – work part and tool-that lead to increases in temperature at the contact area. For drilling and milling operations, the cutting tools rotate at high cutting speeds and act by the cutting force on the work part, which also raises the heat at the contact area. Increases of generated heat at the cutting zone between the cutting tool and working material lead to several problems like wear of tool, tool failure, surface damage of machined parts, increased power consumption, and many hazardous effects to the operator by flying hot chips. To prevent or reduce the hazardous effect of heat on the working area, machining liquids are used for the purposes of cooling and lubricating of the contact zone. This comprehensive review concerned the importance of cutting fluids that are used during machining processes. It will focus light on natural lubricants; the pros and cons, economic and environmental impacts of using natural oils and lubricants as well as the challenges and prospects.
{"title":"NATURAL OILS AS AN ECO-FRIENDLY LUBRICANT FOR MACHINING OPERATIONS, A REVIEW","authors":"W. M. Shewakh, Abdullah A. Faqihi, R. A. Ibrahem","doi":"10.21608/jest.2024.334785","DOIUrl":"https://doi.org/10.21608/jest.2024.334785","url":null,"abstract":"Machining processes are the most common manufacturing operations for a wide range of products in our daily life produced from metallic, polymeric, and composite materials that undergo processing steps to be converted into final products. Turning operations for circular cross-section parts, drilling for cutting a rounded hole, and milling for cutting various configurations are the popular conventional machining processes for the manufacturing of different products. During the turning process, the work part is subjected to rotating speed as well as cutting force from the single point cutting tool which generates high friction forces between the pairs of contact surfaces – work part and tool-that lead to increases in temperature at the contact area. For drilling and milling operations, the cutting tools rotate at high cutting speeds and act by the cutting force on the work part, which also raises the heat at the contact area. Increases of generated heat at the cutting zone between the cutting tool and working material lead to several problems like wear of tool, tool failure, surface damage of machined parts, increased power consumption, and many hazardous effects to the operator by flying hot chips. To prevent or reduce the hazardous effect of heat on the working area, machining liquids are used for the purposes of cooling and lubricating of the contact zone. This comprehensive review concerned the importance of cutting fluids that are used during machining processes. It will focus light on natural lubricants; the pros and cons, economic and environmental impacts of using natural oils and lubricants as well as the challenges and prospects.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"16 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139539786","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 : 2024-01-01DOI: 10.21608/jest.2024.334792
Mohamed Ahmed Massoud, Wael Abouelwafa Ahmed, Bassma H. Elwakil, Mohamed I. Badawi
A closed-loop controller of insulin supply, often known as an artificial pancreas, is used to treat type 1 diabetes. This research presents the status of closed-loop control systems and anticipated future developments while discussing the difficulties of automated glucose management using fuzzy model predictive Controller. By limiting or preventing short-and long-term impacts, these solutions lessen the daily strain of managing diabetes. This paper investigates the current literature on artificial pancreas and suggests a strategy to enhance its regulation. Contrarily, a closed loop system can deliver the proper dose and timing of insulin and glucose. The artificial pancreas' algorithm entails monitoring a patient's blood glucose levels using a glucose sensor before sending a signal to an insulin pump to alter basal insulin dosage in accordance with the desired level of insulin the patient requires. The noninvasive glucose sensor prototype's results point to a promising future for NIR technology in biomedicine, particularly in optical spectroscopy for continuous, real-time glucose monitoring. The outcomes of the non-invasive glucose sensor prototype show that NIR technology has promising applications in biomedicine, particularly in optical spectroscopy for continuous, real-time glucose monitoring.
{"title":"ARTIFICIAL PANCREAS WITH CLOSED-LOOP CONTROL FOR TYPE 1 DIABETES: DESIGN, IMPLEMENTATION, AND EVALUATION","authors":"Mohamed Ahmed Massoud, Wael Abouelwafa Ahmed, Bassma H. Elwakil, Mohamed I. Badawi","doi":"10.21608/jest.2024.334792","DOIUrl":"https://doi.org/10.21608/jest.2024.334792","url":null,"abstract":"A closed-loop controller of insulin supply, often known as an artificial pancreas, is used to treat type 1 diabetes. This research presents the status of closed-loop control systems and anticipated future developments while discussing the difficulties of automated glucose management using fuzzy model predictive Controller. By limiting or preventing short-and long-term impacts, these solutions lessen the daily strain of managing diabetes. This paper investigates the current literature on artificial pancreas and suggests a strategy to enhance its regulation. Contrarily, a closed loop system can deliver the proper dose and timing of insulin and glucose. The artificial pancreas' algorithm entails monitoring a patient's blood glucose levels using a glucose sensor before sending a signal to an insulin pump to alter basal insulin dosage in accordance with the desired level of insulin the patient requires. The noninvasive glucose sensor prototype's results point to a promising future for NIR technology in biomedicine, particularly in optical spectroscopy for continuous, real-time glucose monitoring. The outcomes of the non-invasive glucose sensor prototype show that NIR technology has promising applications in biomedicine, particularly in optical spectroscopy for continuous, real-time glucose monitoring.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"128 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139537849","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 : 2024-01-01DOI: 10.21608/jest.2024.338640
M. A. Massoud, A. S. Ali, A. M. Al-Kabbany, W. Y. Ali, M. H. El-Shazly
{"title":"DEVELOPMENT OF ELECTRONIC SKIN BASED ON BIDIRECTIONAL DIRECT CURRENT TRIBOELECTRIC NANOGENERATOR","authors":"M. A. Massoud, A. S. Ali, A. M. Al-Kabbany, W. Y. Ali, M. H. El-Shazly","doi":"10.21608/jest.2024.338640","DOIUrl":"https://doi.org/10.21608/jest.2024.338640","url":null,"abstract":"","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"6 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140520872","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 : 2024-01-01DOI: 10.21608/jest.2024.334746
A. A. Meshref, A. S. Ali, W. Y. Ali, K. Hamdy
{"title":"REDUCING ELECTROSTATIC CHARGE GENERATED FROM SLIDING OF RUBBER ON PROPOSED ARTIFICIAL TURF","authors":"A. A. Meshref, A. S. Ali, W. Y. Ali, K. Hamdy","doi":"10.21608/jest.2024.334746","DOIUrl":"https://doi.org/10.21608/jest.2024.334746","url":null,"abstract":"","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"82 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139538758","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 : 2024-01-01DOI: 10.21608/jest.2024.334747
M. H. El-Shazly, A. M. Al-Kabbany, W. Y. Ali, A. S. Ali, Ameer A. K.
The present study aims to develop the performance of the triboelectric nanogenerator (TENG) based on triboelectrification and magnetic field. PP and steel sheets of different thicknesses were inserted between the contact area and the magnets to investigate the effect of the distance separating them on the generated voltage. It was found that the generated voltage drastically decreased with increasing PP sheet thickness. Besides, position of the magnets relative to the contact area has insignificant effect on the generated voltage. In sliding, voltage showed higher values than that observed for contact-separation. While voltage significantly increased with increasing the thickness of steel sheet. Longitudinal sliding produced higher voltage values than transverse sliding and contact-separation. Finally, it is proposed to use steel sheet to induce an extra magnetic field to increase the external voltage. In condition of using nonmagnetic material such as PP, the distance between the magnet and the contact area increases then the magnetic field lines become larger and consequently the number of magnetic field lines passing through the contact area decreases leading to the decrease of the magnetic field.
{"title":"INFLUENCE OF MAGNETIC FIELD ON THE PERFORMANCE OF THE TRIBOELECTRIC NANOGENERATOR","authors":"M. H. El-Shazly, A. M. Al-Kabbany, W. Y. Ali, A. S. Ali, Ameer A. K.","doi":"10.21608/jest.2024.334747","DOIUrl":"https://doi.org/10.21608/jest.2024.334747","url":null,"abstract":"The present study aims to develop the performance of the triboelectric nanogenerator (TENG) based on triboelectrification and magnetic field. PP and steel sheets of different thicknesses were inserted between the contact area and the magnets to investigate the effect of the distance separating them on the generated voltage. It was found that the generated voltage drastically decreased with increasing PP sheet thickness. Besides, position of the magnets relative to the contact area has insignificant effect on the generated voltage. In sliding, voltage showed higher values than that observed for contact-separation. While voltage significantly increased with increasing the thickness of steel sheet. Longitudinal sliding produced higher voltage values than transverse sliding and contact-separation. Finally, it is proposed to use steel sheet to induce an extra magnetic field to increase the external voltage. In condition of using nonmagnetic material such as PP, the distance between the magnet and the contact area increases then the magnetic field lines become larger and consequently the number of magnetic field lines passing through the contact area decreases leading to the decrease of the magnetic field.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"78 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139538571","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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