Pub Date : 2022-04-01DOI: 10.21608/jest.2022.231180
Mona Younis
In the field of surface geometry characterization, the growth of tribology studies has created a lot of new impediments. Progress in measurement techniques and procedures has resulted in a several data on surface morphology, as well as a requirement to comprehend the key factors in surface characterization and apply them to friction and wear mechanisms for better predictive tribosystem design. Choosing the best laser cutting settings for stainless steel 307 is an important step in enhancing the surface quality of the cutting edge. The purpose of this research is to present a unique way for enhancing stainless steel cutting conditions. Based on 33 complete factorial trial designs, laser cutting processes for stainless steel 307 plates were performed. For better surface quality, cutting considerations such as speed of cutting, cutting power, and gas pressure are calibrated. The findings revealed that surface quality is influenced by cutting power and cutting speed.
{"title":"SURFACE ROUGHNESS STUDY OF LASER CUT SURFACE","authors":"Mona Younis","doi":"10.21608/jest.2022.231180","DOIUrl":"https://doi.org/10.21608/jest.2022.231180","url":null,"abstract":"In the field of surface geometry characterization, the growth of tribology studies has created a lot of new impediments. Progress in measurement techniques and procedures has resulted in a several data on surface morphology, as well as a requirement to comprehend the key factors in surface characterization and apply them to friction and wear mechanisms for better predictive tribosystem design. Choosing the best laser cutting settings for stainless steel 307 is an important step in enhancing the surface quality of the cutting edge. The purpose of this research is to present a unique way for enhancing stainless steel cutting conditions. Based on 33 complete factorial trial designs, laser cutting processes for stainless steel 307 plates were performed. For better surface quality, cutting considerations such as speed of cutting, cutting power, and gas pressure are calibrated. The findings revealed that surface quality is influenced by cutting power and cutting speed.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123178370","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 : 2022-04-01DOI: 10.21608/jest.2022.231177
{"title":"WELDING PARAMETERS EFFECT ON THE MECHANICAL PROPERTIES OF ALUMINUM ALLOYS","authors":"","doi":"10.21608/jest.2022.231177","DOIUrl":"https://doi.org/10.21608/jest.2022.231177","url":null,"abstract":"","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130197990","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 : 2022-04-01DOI: 10.21608/jest.2022.231181
Mona Younis, Amal Nasser, E. Nasser
The cleaning system, cooling system, and auto tracking system are three modification systems for solar panels that can boost the efficiency and output of the system. The goal of this project is to examine prospective techniques of automated cooling, cleaning, and tracking in solar systems, with the goal of getting an appropriate scope in the design, application, and future development of automatic cooling, cleaning, and tracking technologies. The cooling system works by transferring heat from the solar panel body to the coolant (water) within a serpentine-shaped copper tube put at the rear of the solar panel. Cleaning is accomplished with the use of a cleaning brush that travels across the panel's whole surface. Finally, the automated tracking system relies on two major components to move the panel. This study aimed to designing a new system for smart control of solar panels, the new system was established and tested by the authors.
{"title":"A NEW APPROACH FOR CONTROL SYSTEM OF SOLAR PANELS","authors":"Mona Younis, Amal Nasser, E. Nasser","doi":"10.21608/jest.2022.231181","DOIUrl":"https://doi.org/10.21608/jest.2022.231181","url":null,"abstract":"The cleaning system, cooling system, and auto tracking system are three modification systems for solar panels that can boost the efficiency and output of the system. The goal of this project is to examine prospective techniques of automated cooling, cleaning, and tracking in solar systems, with the goal of getting an appropriate scope in the design, application, and future development of automatic cooling, cleaning, and tracking technologies. The cooling system works by transferring heat from the solar panel body to the coolant (water) within a serpentine-shaped copper tube put at the rear of the solar panel. Cleaning is accomplished with the use of a cleaning brush that travels across the panel's whole surface. Finally, the automated tracking system relies on two major components to move the panel. This study aimed to designing a new system for smart control of solar panels, the new system was established and tested by the authors.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130199306","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 : 2022-01-01DOI: 10.21608/jest.2022.216104
{"title":"DEVELOPING THE PERFORMANCE OF THE MEDICAL FACEMASK TO RESIST COVID-19","authors":"","doi":"10.21608/jest.2022.216104","DOIUrl":"https://doi.org/10.21608/jest.2022.216104","url":null,"abstract":"","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124097729","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 : 2022-01-01DOI: 10.21608/jest.2022.216105
Samuel, Nabhan
Gears are critical components of industrial equipment, where gear failure results machinery failure and that consider as a significant reduction in productivity. It is always critical to keep track of the machine's health in time. Consequently, researchers have been working on developing methods for identifying and diagnosing gear problems. The purpose of this paper is focused to provide a review of a variety of diagnosis techniques that have been shown to be successful when applied to rotating machinery such as gears, as well as to highlight fault detection and identification techniques that are primarily based on vibration analysis. fluctuations from these standards generate distinctive vibration signals whose help in monitoring the gearbox malfunctions. The main sources of these fluctuations are crack tooth, chipped tooth, missing tooth, the surface wear during heat treatment or gearbox assembly, and the geometrical errors, resulting from the gear cutting process and wear. In conclusions, a brief explanation of a novel method of diagnosis based on hybrid artificial intelligence approaches that incorporate neural networks, fuzzy sets, expert systems, and fault detection is provided.
{"title":"SURVEY OF GEAR FAULT DIAGNOSIS USING VARIOUS STATISTICAL SIGNALS PARAMETERS","authors":"Samuel, Nabhan","doi":"10.21608/jest.2022.216105","DOIUrl":"https://doi.org/10.21608/jest.2022.216105","url":null,"abstract":"Gears are critical components of industrial equipment, where gear failure results machinery failure and that consider as a significant reduction in productivity. It is always critical to keep track of the machine's health in time. Consequently, researchers have been working on developing methods for identifying and diagnosing gear problems. The purpose of this paper is focused to provide a review of a variety of diagnosis techniques that have been shown to be successful when applied to rotating machinery such as gears, as well as to highlight fault detection and identification techniques that are primarily based on vibration analysis. fluctuations from these standards generate distinctive vibration signals whose help in monitoring the gearbox malfunctions. The main sources of these fluctuations are crack tooth, chipped tooth, missing tooth, the surface wear during heat treatment or gearbox assembly, and the geometrical errors, resulting from the gear cutting process and wear. In conclusions, a brief explanation of a novel method of diagnosis based on hybrid artificial intelligence approaches that incorporate neural networks, fuzzy sets, expert systems, and fault detection is provided.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130646383","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 : 2022-01-01DOI: 10.21608/jest.2022.216108
M. Abdelrahim, Omar Salah
In this paper, control design techniques are proposed for trajectory tracking of sloshcontainer system. In particular we assume that only partial state measurements are available for feedback and we synthesize observer-based control law such that the controlled output successfully tracks a pre-defined trajectory. Moreover, we take into account the uncertainty issue in the estimate of the viscous friction coefficient and we enhance the controller with a robustness property against such uncertainty. The proposed approach is demonstrated by numerical simulations on the dynamical model of sloshcontainer system.
{"title":"ROBUST TRACKING CONTROL FOR SLOSH-CONTAINER SYSTEM AGAINST VISCOUS FRICTION UNCERTAINTY","authors":"M. Abdelrahim, Omar Salah","doi":"10.21608/jest.2022.216108","DOIUrl":"https://doi.org/10.21608/jest.2022.216108","url":null,"abstract":"In this paper, control design techniques are proposed for trajectory tracking of sloshcontainer system. In particular we assume that only partial state measurements are available for feedback and we synthesize observer-based control law such that the controlled output successfully tracks a pre-defined trajectory. Moreover, we take into account the uncertainty issue in the estimate of the viscous friction coefficient and we enhance the controller with a robustness property against such uncertainty. The proposed approach is demonstrated by numerical simulations on the dynamical model of sloshcontainer system.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134452971","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 : 2022-01-01DOI: 10.21608/jest.2022.217110
{"title":"EFFECT OF ELECTRIC CURRENT ON THE TRIBOLOGICAL PROPERTIES OF LITHIUM GREASE DISPERSED BY SILCA NANO PARTICLES AND CARBON NANOTUBES","authors":"","doi":"10.21608/jest.2022.217110","DOIUrl":"https://doi.org/10.21608/jest.2022.217110","url":null,"abstract":"","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126306265","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 : 2022-01-01DOI: 10.21608/jest.2022.216109
Ossia, Big-Alabo
ABSTRACT This study presents the performance evaluation of Apricot (Prunus armeniaca L.) kernel oil vegetable-based cutting fluid (AKO VBCF) using L27 orthogonal arrays design in the turning of AISI 1020 steel. The evaluation criteria were surface roughness (XSR), surface temperature (XST), and chip thickness (XCT) based on cutting speed (Xs), cutting time (Xt), and cutting depth (Xd) variables. The results showed that the turning performances were greatly influenced by Xs. All process variables showed positive main effects on XST, in the order Xs > Xd > Xt for AKO VBCF, but the reverse order for hydrocarbon-basedcutting fluid (HBCF). Rotating speed, Xs showed higher negative main effect on XSR, followed by Xt. Xd main effect was positive for both cutting fluids. AKO VBCF Xs main effect was greater than that of HBCF. There was no interaction effect in HBCF unlike AKO VBCF with negative XsXt and positive XsXd interaction. For both cutting fluids XCT was independent of Xt. AKO VBCF showed negative quadratic effect of Xs, unlike HBCF which was positive. Finally, the second order multivariate models of XSR, XST and XCT showed close agreement between the predicted and experimental values.
{"title":"PERFORMANCE EVALUATION OF APRICOT KERNEL OIL-BASED CUTTING-FLUID USING L27 ORTHOGONAL ARRAYS DESIGN","authors":"Ossia, Big-Alabo","doi":"10.21608/jest.2022.216109","DOIUrl":"https://doi.org/10.21608/jest.2022.216109","url":null,"abstract":"ABSTRACT This study presents the performance evaluation of Apricot (Prunus armeniaca L.) kernel oil vegetable-based cutting fluid (AKO VBCF) using L27 orthogonal arrays design in the turning of AISI 1020 steel. The evaluation criteria were surface roughness (XSR), surface temperature (XST), and chip thickness (XCT) based on cutting speed (Xs), cutting time (Xt), and cutting depth (Xd) variables. The results showed that the turning performances were greatly influenced by Xs. All process variables showed positive main effects on XST, in the order Xs > Xd > Xt for AKO VBCF, but the reverse order for hydrocarbon-basedcutting fluid (HBCF). Rotating speed, Xs showed higher negative main effect on XSR, followed by Xt. Xd main effect was positive for both cutting fluids. AKO VBCF Xs main effect was greater than that of HBCF. There was no interaction effect in HBCF unlike AKO VBCF with negative XsXt and positive XsXd interaction. For both cutting fluids XCT was independent of Xt. AKO VBCF showed negative quadratic effect of Xs, unlike HBCF which was positive. Finally, the second order multivariate models of XSR, XST and XCT showed close agreement between the predicted and experimental values.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131335487","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 : 2022-01-01DOI: 10.21608/jest.2022.216106
The objectives of the present investigation is to determine the effect of light curing time on the hardness and friction coefficient of composite resin filled with (SiC NFs). The materials used are hybrid composite resin and SiC NFs. Four groups of composite resin specimens are prepared; one as received and three groups reinforced by SiC NFs in concentrations of 0.1, 0.2 and 0.3 wt. %. SiC NFs are manually mixed with hybrid composites resin. The resulting paste is packed into plastic bars. The specimens are then cured from both sides for 40, 60 and 99 seconds using a visible light curing unit. Surface hardness is measured using Shore D durometer test. The coefficient of friction is determined using two-body abrasion test. It was found that high curing times gave higher hardness values and moderate friction coefficient compared to low curing times. The minimum content of SiC NFs (0.1 wt. %) improved the hardness and frictional behavior. Based on that, it may be concluded that hardness and friction coefficient are significantly affected by curing times and SiC NFs concentrations.
{"title":"HARDNESS AND FRICTIONAL BEHAVIOUR OF DENTAL HYBRID COMPOSITE RESIN FILLED BY SILICON CARBIDE NANOFIBERS","authors":"","doi":"10.21608/jest.2022.216106","DOIUrl":"https://doi.org/10.21608/jest.2022.216106","url":null,"abstract":"The objectives of the present investigation is to determine the effect of light curing time on the hardness and friction coefficient of composite resin filled with (SiC NFs). The materials used are hybrid composite resin and SiC NFs. Four groups of composite resin specimens are prepared; one as received and three groups reinforced by SiC NFs in concentrations of 0.1, 0.2 and 0.3 wt. %. SiC NFs are manually mixed with hybrid composites resin. The resulting paste is packed into plastic bars. The specimens are then cured from both sides for 40, 60 and 99 seconds using a visible light curing unit. Surface hardness is measured using Shore D durometer test. The coefficient of friction is determined using two-body abrasion test. It was found that high curing times gave higher hardness values and moderate friction coefficient compared to low curing times. The minimum content of SiC NFs (0.1 wt. %) improved the hardness and frictional behavior. Based on that, it may be concluded that hardness and friction coefficient are significantly affected by curing times and SiC NFs concentrations.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132811717","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 : 2022-01-01DOI: 10.21608/jest.2022.216107
The present investigation studies the wear of dental resin filled by silicon carbide nanofibers (SiC NFs) concentrations. The materials used are dental resin and SiC NFs. Four groups of the resin specimens are prepared; one as received and three groups reinforced by SiC NFs in concentrations of 0.1, 0.2 and 0.3 wt. %. SiC NFs are manually mixed with the dental resin. The specimens are then light cured from both sides for 40, 60 and 99 seconds using a visible light curing unit. It was found that high curing times give high wear resistance compared to low curing times. Wear resistance displayed by all the tested specimens increased up to 0.1 wt. % SiC NFs , then decreased with increasing SiC NFs contents. Besides, composite containing 0.3 wt. % SiC NFs gives the lowest wear resistance. Based on the results, it can be noticed that wear resistance are considerably affected by curing times and SiC NFs concentrations.
{"title":"WEAR BEHAVIOUR OF DENTAL RESIN REINFORCED BY SILICON CARBIDE NANOFIBERS","authors":"","doi":"10.21608/jest.2022.216107","DOIUrl":"https://doi.org/10.21608/jest.2022.216107","url":null,"abstract":"The present investigation studies the wear of dental resin filled by silicon carbide nanofibers (SiC NFs) concentrations. The materials used are dental resin and SiC NFs. Four groups of the resin specimens are prepared; one as received and three groups reinforced by SiC NFs in concentrations of 0.1, 0.2 and 0.3 wt. %. SiC NFs are manually mixed with the dental resin. The specimens are then light cured from both sides for 40, 60 and 99 seconds using a visible light curing unit. It was found that high curing times give high wear resistance compared to low curing times. Wear resistance displayed by all the tested specimens increased up to 0.1 wt. % SiC NFs , then decreased with increasing SiC NFs contents. Besides, composite containing 0.3 wt. % SiC NFs gives the lowest wear resistance. Based on the results, it can be noticed that wear resistance are considerably affected by curing times and SiC NFs concentrations.","PeriodicalId":212154,"journal":{"name":"Journal of the Egyptian Society of Tribology","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133651791","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：