Pub Date : 2021-02-24DOI: 10.5545/SV-JME.2020.6912
S. Rahul, T. V. Rao, N. HarshaD, H. Girish, T. Ishigaki, P. Madhusudan
An Investigation on Laser Welding Parameters on the Strength of TRIP Steel Khot Rahul, S. – Venkateshwara Rao, T. – Harshad, N. – Girish, H.N. – Ishigaki, T. – Madhusudan, P. Khot Rahul S1 – T. Venkateshwara Rao2 – Harshad Natu3 – H.N. Girish4 – Tadashi Ishigaki5 – Puttaswamy Madhusudan6,7,* 1 K L University, Mechanical Department, India 2 DBS Institute of Technology, Mechanical Department, India 3 Magod Fusion Laser Welding System, India 4 University of Mysore, Department of Earth Science, India 5 Tottori University, Faculty of Engineering, Japan 6 Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam 7 Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam
调查对激光焊接参数对旅行的强度钢Khot拉胡尔,s - Venkateshwara Rao, t - Harshad, n - Girish, H.N.石垣岛,t -马,p . Khot拉胡尔S1 - t . Venkateshwara Rao2——Harshad Natu3 - H.N. Girish4佐藤Ishigaki5 Puttaswamy Madhusudan6, 7 * 1 K L大学机械部门,印度2 DBS理工学院,机械部门,印度3 Magod融合激光焊接系统,印度迈索尔大学4、地球科学、印度5鸟取大学工学院日本6越南胡志明市同德堂大学环境工程与管理研究小组7越南胡志明市同德堂大学环境与劳动安全学院
{"title":"An Investigation on Laser Welding Parameters on the Strength of TRIP Steel","authors":"S. Rahul, T. V. Rao, N. HarshaD, H. Girish, T. Ishigaki, P. Madhusudan","doi":"10.5545/SV-JME.2020.6912","DOIUrl":"https://doi.org/10.5545/SV-JME.2020.6912","url":null,"abstract":"An Investigation on Laser Welding Parameters on the Strength of TRIP Steel Khot Rahul, S. – Venkateshwara Rao, T. – Harshad, N. – Girish, H.N. – Ishigaki, T. – Madhusudan, P. Khot Rahul S1 – T. Venkateshwara Rao2 – Harshad Natu3 – H.N. Girish4 – Tadashi Ishigaki5 – Puttaswamy Madhusudan6,7,* 1 K L University, Mechanical Department, India 2 DBS Institute of Technology, Mechanical Department, India 3 Magod Fusion Laser Welding System, India 4 University of Mysore, Department of Earth Science, India 5 Tottori University, Faculty of Engineering, Japan 6 Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam 7 Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78677490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-24DOI: 10.5545/SV-JME.2020.6998
Q. Zeng, Yang Li, Yang Yang
Hydraulic support is a complex parallel mechanism composed of multiple kinematic pairs. In the work of hydraulic support, clearances between kinematic pairs are inevitable, which lead to the deterioration of the support’s working performance, and may even affect support’s normal work in serious cases. To study the influence of clearances on hydraulic support and simultaneously avoid the mutual interference between different clearances, the normal and tangential force models of kinematic pairs with clearance are established, based on the Lankarani-Nikravesh contact force model and the Coulomb friction model. Furthermore, the dynamic model of the hydraulic support with single clearance is established by adding a clearance between the rear link and base and, according to the dynamic model of the hydraulic support, the research about the influence of clearance on the movement and force of hydraulic support is carried out, which proves the need to study the clearance of hydraulic support. Moreover, the influence of clearance, clearance size, and different oil inlet drive modes of front and rear columns on the stability of hydraulic support are analysed, and then the change of hydraulic support posture caused by clearance and clearance size is considered. The results show that clearance causes the movement and force of the rear link to fluctuate, which affects the stability of the hydraulic support. The clearance size affects the fluctuation degree of the movement and force, which is an important factor in the instability of hydraulic support. Also, the hydraulic support posture is changed by the clearance and clearance size. Different column oil inlet drive modes have different impacts on the clearance and have different effects on the stability of hydraulic support.
{"title":"Dynamic Analysis of Hydraulic Support with Single Clearance","authors":"Q. Zeng, Yang Li, Yang Yang","doi":"10.5545/SV-JME.2020.6998","DOIUrl":"https://doi.org/10.5545/SV-JME.2020.6998","url":null,"abstract":"Hydraulic support is a complex parallel mechanism composed of multiple kinematic pairs. In the work of hydraulic support, clearances between kinematic pairs are inevitable, which lead to the deterioration of the support’s working performance, and may even affect support’s normal work in serious cases. To study the influence of clearances on hydraulic support and simultaneously avoid the mutual interference between different clearances, the normal and tangential force models of kinematic pairs with clearance are established, based on the Lankarani-Nikravesh contact force model and the Coulomb friction model. Furthermore, the dynamic model of the hydraulic support with single clearance is established by adding a clearance between the rear link and base and, according to the dynamic model of the hydraulic support, the research about the influence of clearance on the movement and force of hydraulic support is carried out, which proves the need to study the clearance of hydraulic support. Moreover, the influence of clearance, clearance size, and different oil inlet drive modes of front and rear columns on the stability of hydraulic support are analysed, and then the change of hydraulic support posture caused by clearance and clearance size is considered. The results show that clearance causes the movement and force of the rear link to fluctuate, which affects the stability of the hydraulic support. The clearance size affects the fluctuation degree of the movement and force, which is an important factor in the instability of hydraulic support. Also, the hydraulic support posture is changed by the clearance and clearance size. Different column oil inlet drive modes have different impacts on the clearance and have different effects on the stability of hydraulic support.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74736522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-15DOI: 10.5545/sv-jme.2020.6840
M. Bartoszuk
This article shows selected results of experimental tests and the results of analytical and numerical modelling of the thermal characteristics of the cutting process. The tests were conducted for the case of the dry turning of austenitic steel AISI 321 with cutting tools with a flat rake face. The research aimed to determine the actual division of thermal fluxes in the zone of contact between the chip and the rake face. As a result of such work, a formula for a new heat partition coefficient and a formula for calculating the average contact temperature were developed. The results showed that the formulas developed can be a useful tool to estimate heat distribution in the cutting zone quickly.
{"title":"Temperature and Heat Partition Testing in the Cutting Zone for Turning AISI 321 Steel","authors":"M. Bartoszuk","doi":"10.5545/sv-jme.2020.6840","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6840","url":null,"abstract":"This article shows selected results of experimental tests and the results of analytical and numerical modelling of the thermal characteristics of the cutting process. The tests were conducted for the case of the dry turning of austenitic steel AISI 321 with cutting tools with a flat rake face. The research aimed to determine the actual division of thermal fluxes in the zone of contact between the chip and the rake face. As a result of such work, a formula for a new heat partition coefficient and a formula for calculating the average contact temperature were developed. The results showed that the formulas developed can be a useful tool to estimate heat distribution in the cutting zone quickly.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82931513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-15DOI: 10.5545/sv-jme.2020.6810
Yan Hongwei, Yang Xiong, Hou Xiangrong, Wang Lu, Liang Pengcheng
*Corr. Author’s Address: School of Mechanical Engineering, North University of China, Taiyuan, China, aweigeyan@nuc.edu.cn 668 Research on the Performance of a New External Occlusion Device for Pressure Vessel Leakage Yan, H.W. – Yang, X. – Hou, X.R. – Wang, L. – Li, P.C. Hongwei Yan – Xiong Yang – Xiangrong Hou – Lu Wang– Pengcheng Li North University of China, School of Mechanical Engineering, China
{"title":"Research on the Performance of a New External Occlusion Device for Pressure Vessel Leakage","authors":"Yan Hongwei, Yang Xiong, Hou Xiangrong, Wang Lu, Liang Pengcheng","doi":"10.5545/sv-jme.2020.6810","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6810","url":null,"abstract":"*Corr. Author’s Address: School of Mechanical Engineering, North University of China, Taiyuan, China, aweigeyan@nuc.edu.cn 668 Research on the Performance of a New External Occlusion Device for Pressure Vessel Leakage Yan, H.W. – Yang, X. – Hou, X.R. – Wang, L. – Li, P.C. Hongwei Yan – Xiong Yang – Xiangrong Hou – Lu Wang– Pengcheng Li North University of China, School of Mechanical Engineering, China","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79842143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-15DOI: 10.5545/sv-jme.2020.6667
X. Xu, Xupeng Fan, P. Wei, Bao Yang
To analyse the lubrication characteristics of harmonic gears and lay the foundation for the study of its gear tooth failure performance and dynamic characteristics, based on the tooth contact geometry of harmonic gear, the integrated curvature radius, tooth load, and entrainment velocity at the meshing point of the gear teeth in the harmonic gear transmission are analysed. A finite-length line contact elastohydrodynamic lubrication (EHL) model for harmonic gears is established. The numerical calculation method is used to solve the oil film thickness and pressure distribution in the lubricating area, and the effects of rotational speed and temperature on the contacting load ratio and film thickness ratio of the meshing area are studied, as well as the change of oil film stiffness under different working conditions. The results show that along the meshing direction, the pressure is small at the end and reaches a peak at the centre, and the film thickness is the largest in the entrance area and is evenly distributed in the centre contact area. As the speed increases, the gear tooth contact load ratio decreases, the oil film thickness ratio increases, the stiffness of the oil film decreases significantly, and the lubrication effect is improved; but the temperature has the opposite effect. Proper increase of rotation speed and decrease of oil temperature can effectively improve the lubrication characteristics of the system.
{"title":"Research on the Lubrication Characteristics of Harmonic Gear Transmission Meshing Areas","authors":"X. Xu, Xupeng Fan, P. Wei, Bao Yang","doi":"10.5545/sv-jme.2020.6667","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6667","url":null,"abstract":"To analyse the lubrication characteristics of harmonic gears and lay the foundation for the study of its gear tooth failure performance and dynamic characteristics, based on the tooth contact geometry of harmonic gear, the integrated curvature radius, tooth load, and entrainment velocity at the meshing point of the gear teeth in the harmonic gear transmission are analysed. A finite-length line contact elastohydrodynamic lubrication (EHL) model for harmonic gears is established. The numerical calculation method is used to solve the oil film thickness and pressure distribution in the lubricating area, and the effects of rotational speed and temperature on the contacting load ratio and film thickness ratio of the meshing area are studied, as well as the change of oil film stiffness under different working conditions. The results show that along the meshing direction, the pressure is small at the end and reaches a peak at the centre, and the film thickness is the largest in the entrance area and is evenly distributed in the centre contact area. As the speed increases, the gear tooth contact load ratio decreases, the oil film thickness ratio increases, the stiffness of the oil film decreases significantly, and the lubrication effect is improved; but the temperature has the opposite effect. Proper increase of rotation speed and decrease of oil temperature can effectively improve the lubrication characteristics of the system.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88248119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-15DOI: 10.5545/sv-jme.2020.6688
A. Trelka, W. Żórawski, A. Góral
*Corr. Author’s Address: Institute of Metallurgy and Materials Science, Polish Academy of Sciences, ul. Reymonta 25, 30-059 Krakow, Poland, a.trelka@imim.pl 494 Microstructure and Property Modification of Cold Sprayed Coatings Using Different Grain Sizes of Cr3C2-25(Ni20Cr) Composite Powder Trelka, A. – Żórawski, W. – Góral, A. Anna Trelka1,* – Wojciech Żórawski2 – Anna Góral1 1Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Poland 2Laser Processing Research Centre, Kielce University of Technology, Poland
*相关系数。作者地址:波兰科学院冶金与材料科学研究所。494不同晶粒尺寸Cr3C2-25(Ni20Cr)复合粉末冷喷涂涂层的组织与性能研究Trelka, A. - Żórawski, W. - Góral, A. Anna Trelka1，* - Wojciech Żórawski2 - Anna Góral1 1波兰科学院冶金与材料科学研究所，波兰Kielce工业大学激光加工研究中心
{"title":"Microstructure and Property Modification of Cold Sprayed Coatings Using Different Grain Sizes of Cr3C2-25(Ni20Cr) Composite Powder","authors":"A. Trelka, W. Żórawski, A. Góral","doi":"10.5545/sv-jme.2020.6688","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6688","url":null,"abstract":"*Corr. Author’s Address: Institute of Metallurgy and Materials Science, Polish Academy of Sciences, ul. Reymonta 25, 30-059 Krakow, Poland, a.trelka@imim.pl 494 Microstructure and Property Modification of Cold Sprayed Coatings Using Different Grain Sizes of Cr3C2-25(Ni20Cr) Composite Powder Trelka, A. – Żórawski, W. – Góral, A. Anna Trelka1,* – Wojciech Żórawski2 – Anna Góral1 1Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Poland 2Laser Processing Research Centre, Kielce University of Technology, Poland","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74004756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-31DOI: 10.5545/sv-jme.2020.6784
A. Tzotzis, C. García-Hernández, José-Luis Huertas-Talón, P. Kyratsis
3D FE Modelling of Machining Forces during AISI 4140 Hard Turning Tzotzis, A. – García-Hernández, C. – Huertas-Talón, J.L. – Kyratsis, P. Anastasios Tzotzis1,* – César García-Hernández1 – José-Luis Huertas-Talón1 – Panagiotis Kyratsis2 1University of Zaragoza, Department of Design and Manufacturing Engineering, Spain 2University of Western Macedonia, Department of Product and Systems Design Engineering, Greece
{"title":"3D FE Modelling of Machining Forces during AISI 4140 Hard Turning","authors":"A. Tzotzis, C. García-Hernández, José-Luis Huertas-Talón, P. Kyratsis","doi":"10.5545/sv-jme.2020.6784","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6784","url":null,"abstract":"3D FE Modelling of Machining Forces during AISI 4140 Hard Turning Tzotzis, A. – García-Hernández, C. – Huertas-Talón, J.L. – Kyratsis, P. Anastasios Tzotzis1,* – César García-Hernández1 – José-Luis Huertas-Talón1 – Panagiotis Kyratsis2 1University of Zaragoza, Department of Design and Manufacturing Engineering, Spain 2University of Western Macedonia, Department of Product and Systems Design Engineering, Greece","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73691679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-31DOI: 10.5545/sv-jme.2020.6676
Zhang Zifeng, Fu Hongxun, Liang Xuemeng, Chen Xiaoxia, Tan Di
*Corr. Author’s Address: Shandong University of Technology, Zibo, China, fuhongxun615@163.com 458 Comparative Analysis of Static and Dynamic Performance of Nonpneumatic Tire with Flexible Spoke Structure Zhang, Z.F. – Fu, H.X. – Liang, X.M. – Chen, X.X. – Tan, D. Zifeng Zhang – Hongxun Fu* – Xuemeng Liang – Xiaoxia Chen – Di Tan Shandong University of Technology, School of Transportation and Vehicle Engineering, China
{"title":"Comparative Analysis of Static and Dynamic Performance of Nonpneumatic Tire with Flexible Spoke Structure","authors":"Zhang Zifeng, Fu Hongxun, Liang Xuemeng, Chen Xiaoxia, Tan Di","doi":"10.5545/sv-jme.2020.6676","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6676","url":null,"abstract":"*Corr. Author’s Address: Shandong University of Technology, Zibo, China, fuhongxun615@163.com 458 Comparative Analysis of Static and Dynamic Performance of Nonpneumatic Tire with Flexible Spoke Structure Zhang, Z.F. – Fu, H.X. – Liang, X.M. – Chen, X.X. – Tan, D. Zifeng Zhang – Hongxun Fu* – Xuemeng Liang – Xiaoxia Chen – Di Tan Shandong University of Technology, School of Transportation and Vehicle Engineering, China","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76814802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-15DOI: 10.5545/sv-jme.2020.6593
D. Petrović, Marjan Dodić, Nenad Kapor
It is well-known that high working overpressure in a tire adversely affects its service life, while a lower overpressure requires larger tire dimensions and weight. The goal of this research is to find the way to decrease the overpressure in a standard tire in order to increase its durability, while preserving or increasing its load-capacity and retaining the same geometric characteristics. This paper presents a new construction solution that consists of a standard (outer) tire and a smaller (inner) tire inserted in the standard one. This set of tires creates a unique kinetic energy absorption system that occurs when the aircraft lands in direct contact with the runway. During the aircraft hard landing, a large deformation of the tire occurs, i.e., the tire surface is drawn inward both in the cross-section and in the longitudinal section. In this case, the whole weight of the airplane is directed on the tire-shoulder, meaning that the actual contact surface is small. In the new solution, the inner tire prevents the standard tire from drawing inward and keeps it in contact with the runway during tire deflection. A comparative analysis of the change in deflection, track width, and stress distribution of a standard tire and a set of tires in the new solution is performed. It was shown that the new construction solution increases the tire track width by about 8 % and, therefore, the greater contact area between the tires and the runway. In addition, tire stress is decreased by about 40 %; therefore, it has higher tire durability, as well as the ability to absorb more kinetic energy by 56 % compared to a standard tire.
{"title":"A New Design Solution for Aircraft Wheels that Reduces Overpressure in the Tire while Retaining its Absorption Power and its Dimensions","authors":"D. Petrović, Marjan Dodić, Nenad Kapor","doi":"10.5545/sv-jme.2020.6593","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6593","url":null,"abstract":"It is well-known that high working overpressure in a tire adversely affects its service life, while a lower overpressure requires larger tire dimensions and weight. The goal of this research is to find the way to decrease the overpressure in a standard tire in order to increase its durability, while preserving or increasing its load-capacity and retaining the same geometric characteristics. This paper presents a new construction solution that consists of a standard (outer) tire and a smaller (inner) tire inserted in the standard one. This set of tires creates a unique kinetic energy absorption system that occurs when the aircraft lands in direct contact with the runway. During the aircraft hard landing, a large deformation of the tire occurs, i.e., the tire surface is drawn inward both in the cross-section and in the longitudinal section. In this case, the whole weight of the airplane is directed on the tire-shoulder, meaning that the actual contact surface is small. In the new solution, the inner tire prevents the standard tire from drawing inward and keeps it in contact with the runway during tire deflection. A comparative analysis of the change in deflection, track width, and stress distribution of a standard tire and a set of tires in the new solution is performed. It was shown that the new construction solution increases the tire track width by about 8 % and, therefore, the greater contact area between the tires and the runway. In addition, tire stress is decreased by about 40 %; therefore, it has higher tire durability, as well as the ability to absorb more kinetic energy by 56 % compared to a standard tire.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80024748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-15DOI: 10.5545/sv-jme.2020.6681
Himmat Singh, M. Niranjan, Reeta Wattal
Ball-end magnetorheological finishing (BEMRF) is a high-level nanofinishing process used in finishing different kinds of surfaces including flat, 2and 3-dimensional, and curved surfaces. In the present study, a pulse DC power supply is used to energize the electromagnet of magnetorheological (MR) finishing tool. The experiments have been conducted on EN-31 flat workpiece surface with and without pulse DC power supply using a magnetizing current (MC) 2.5 A, a working gap (WG) of 1.5 mm and a rotational speed of the tool (RST) of 500 rpm with a feed rate of workpiece of 50 mm/min. The study has been carried out to analyse the effect of the duty cycle on the response percentage reduction in surface roughness. It has been observed that an improved response percentage reduction in surface roughness has been found with pulsating DC power supply as compared to the response percentage reduction in surface roughness obtained with DC power supply without pulse at the same process parameters. After conducting the preliminary experiments, the statistical analysis was done to analyse the effect of various process parameters on the response percentage reduction in surface roughness using response surface methodology (RSM) at 0.16 duty cycle.
{"title":"A Study for the Nanofinishing of an EN-31 Workpiece with Pulse DC Power Supply Using Ball-End Magnetorheological Finishing","authors":"Himmat Singh, M. Niranjan, Reeta Wattal","doi":"10.5545/sv-jme.2020.6681","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6681","url":null,"abstract":"Ball-end magnetorheological finishing (BEMRF) is a high-level nanofinishing process used in finishing different kinds of surfaces including flat, 2and 3-dimensional, and curved surfaces. In the present study, a pulse DC power supply is used to energize the electromagnet of magnetorheological (MR) finishing tool. The experiments have been conducted on EN-31 flat workpiece surface with and without pulse DC power supply using a magnetizing current (MC) 2.5 A, a working gap (WG) of 1.5 mm and a rotational speed of the tool (RST) of 500 rpm with a feed rate of workpiece of 50 mm/min. The study has been carried out to analyse the effect of the duty cycle on the response percentage reduction in surface roughness. It has been observed that an improved response percentage reduction in surface roughness has been found with pulsating DC power supply as compared to the response percentage reduction in surface roughness obtained with DC power supply without pulse at the same process parameters. After conducting the preliminary experiments, the statistical analysis was done to analyse the effect of various process parameters on the response percentage reduction in surface roughness using response surface methodology (RSM) at 0.16 duty cycle.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78245311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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