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Evaluating the Structural Integrity of Fibreglass for the Manufacture of Headgears 用于制造头架的玻璃纤维结构完整性评估
现代机械工程(英文) Pub Date : 2021-05-25 DOI: 10.4236/MME.2021.112002
O. A. Adefuye, Nurudeen A. Raji, R. O. Kuku, T. Oyetade, R. Ola-Gbadamosi
{"title":"Evaluating the Structural Integrity of Fibreglass for the Manufacture of Headgears","authors":"O. A. Adefuye, Nurudeen A. Raji, R. O. Kuku, T. Oyetade, R. Ola-Gbadamosi","doi":"10.4236/MME.2021.112002","DOIUrl":"https://doi.org/10.4236/MME.2021.112002","url":null,"abstract":"A \u0000composite material is made up of two phases, the matrix, and the reinforcing materials. The reinforcing material is embedded \u0000over matrix material. The reinforcing material works to make the matrix \u0000material harder. A fibreglass reinforced composite was developed using E-glass \u0000fibre reinforcement and epoxy resin matrix. The composites were produced using \u0000the hand lay-up technique with varying fibre percentage of 9%, 13% and 25% by \u0000weight percentage of fibreglass mat at orientations of 0°, 15°, 45°, and 90° chosen at random. A 13% by weight percentage of chopped mat was also developed \u0000for purpose of comparison. The fabricated composites were subjected to tensile \u0000test, flexural test, impact test, punch shear test and hardness test to \u0000ascertain the appropriate fibre contents and orientation that is optimum for \u0000the manufacture of headgears. Analysis of Variance was carried out to determine \u0000level of significance and percentage \u0000contribution of the parameters. The results show that both fibre \u0000orientation and percentage of fibre content reinforcement of have significant \u0000influence on the strength and fracture energy of the composite .The fibre \u0000orientation has a higher impact on the strength of the composite (79.74%) while \u0000the percentage of fibre reinforcement has a lesser impact on the tensile \u0000strength of the composite (20.26%). However, the fibre orientation has a lesser impact on the fracture \u0000energy of the composite (24.54%) while the percentage of fibre \u0000reinforcement has a higher impact on the fracture energy of the composite \u0000(75.46%) The result from this study shows that the increase in fibre content \u0000increases flexural strength and impact toughness of the fibreglass reinforced \u0000composite. A fibre orientation of 90° and fibre reinforcement of 25% wt. was \u0000determined to be optimally suitable for the manufacture of headgears.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"11 1","pages":"13-26"},"PeriodicalIF":0.0,"publicationDate":"2021-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43138948","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}
引用次数: 1
Design Analysis of Bevel Gear for Gearmotor Selection in Revolving Platform 旋转平台减速电机选择用锥齿轮设计分析
现代机械工程(英文) Pub Date : 2021-02-25 DOI: 10.4236/MME.2021.111001
Nurudeen A. Raji, K. Adedeji, E. Oyetunji, Ayodeji D. Agbelusi
{"title":"Design Analysis of Bevel Gear for Gearmotor Selection in Revolving Platform","authors":"Nurudeen A. Raji, K. Adedeji, E. Oyetunji, Ayodeji D. Agbelusi","doi":"10.4236/MME.2021.111001","DOIUrl":"https://doi.org/10.4236/MME.2021.111001","url":null,"abstract":"The \u0000design of bevel gear for use in the development of revolving rostrum is \u0000presented. The pinion gear is designed to rotate at 1400 rpm for the output \u0000gear of 23 rpm. A suitable gearmotor was selected for the design based on the \u0000bevel gear design analysis. The motion is transmitted to the rostrum via a \u0000shaft keyed to it with a gib-head key and assembled on the rostrum with a \u0000spline connector. The analysis of the bevel mesh shows that maximum deformation \u0000of about 26.552 mm occurs in the pinion due to the loading the pinion tooth. \u0000The deformation of the tooth is observed to affect considerable the performance \u0000of the system. The transmission efficiency of the mechanism was obtained as 86% though effective for the \u0000operation of the system but could be \u0000improved by a more careful material selection for the bevel gear mesh.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70497442","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}
引用次数: 0
Experimental Verification for the Application Feasibility of Buckingham Pi Theorem in Designing a Scaled Model of Flagellated Swimmer with Traditional Resistive Force Theory 利用传统的阻力理论对Buckingham Pi定理在设计受鞭笞游泳者比例模型中的可行性进行了实验验证
现代机械工程(英文) Pub Date : 2021-01-01 DOI: 10.4236/mme.2021.113004
Ou Jin
{"title":"Experimental Verification for the Application Feasibility of Buckingham Pi Theorem in Designing a Scaled Model of Flagellated Swimmer with Traditional Resistive Force Theory","authors":"Ou Jin","doi":"10.4236/mme.2021.113004","DOIUrl":"https://doi.org/10.4236/mme.2021.113004","url":null,"abstract":"","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70497513","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}
引用次数: 0
Grading of Spot Welding Electrode Material Properties Using AHP 用层次分析法对点焊焊条材料性能进行分级
现代机械工程(英文) Pub Date : 2020-12-25 DOI: 10.31875/2409-9848.2020.07.8
B. Bachchhav, Abhishek Kumbhare, Chinmay Hoonur, S. Kulkarni, Jaydeo Kalankar
{"title":"Grading of Spot Welding Electrode Material Properties Using AHP","authors":"B. Bachchhav, Abhishek Kumbhare, Chinmay Hoonur, S. Kulkarni, Jaydeo Kalankar","doi":"10.31875/2409-9848.2020.07.8","DOIUrl":"https://doi.org/10.31875/2409-9848.2020.07.8","url":null,"abstract":"An objective of this research is to rank the essential property required for spot welding material selection. Total ten attributes namely Electrical conductivity, Thermal conductivity, Rockwell Hardness, Wear resistance, Density, Cost, Melting point, Percentage Elongation, Yield Strength and Ultimate Tensile Strength were considered for the purpose of selection of the electrode Material. In order to select appropriate spot welding electrode, authors have studied various Copper alloys having equally good properties. The selection of essential properties was done using Analytical Hierarchy Process (AHP). Experimental work have been carried out on Cu-Cr-Zr material using universal tensile and found that the strength and hardness increases with alloying element, however percentage elongation decreases by 50 % as compared to pure Cu. While performing AHP, the authors found that electrical conductivity, wear resistance, thermal conductivity and Rockwell hardness proved to be the most crucial parameters. Wear of electrode material also affects on current density and performance characteristics of spot welding process and makes it more expensive. The ranking of the property thus provide an input to apply various Multi-Attribution Decision Making (MADM) techniques for selection of the appropriate material for spot welding application. This work is recommended to spot welding electrode manufacturers as well as end users in order to prioritize the properties for selection of spot welding electrode with longer life and good weld quality.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"7 1","pages":"59-65"},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43778380","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}
引用次数: 3
Application and Development of 3D Printing in Medical Field 3D打印技术在医学领域的应用与发展
现代机械工程(英文) Pub Date : 2020-08-10 DOI: 10.4236/mme.2020.103003
Chunhua Sun, G. Shang
{"title":"Application and Development of 3D Printing in Medical Field","authors":"Chunhua Sun, G. Shang","doi":"10.4236/mme.2020.103003","DOIUrl":"https://doi.org/10.4236/mme.2020.103003","url":null,"abstract":"Different from reduction manufacturing and equal \u0000manufacturing, 3D printing is an additive manufacturing method, which \u0000transforms 3D model into 2D cross-section data to form entity layer by layer. This \u0000makes its processing not limited by complexity of the design model and number \u0000of the manufacturing products. It is very suitable for the medical field with \u0000high customization requirements. In fact, application of 3D printing technology \u0000in the medical field is particularly noticeable. In this paper, application and \u0000development of 3D printing technology are \u0000reviewed in medical model, rehabilitation equipment, tissue engineering, \u0000medical hygiene materials, lab-on-chip. Its applications include medical \u0000education, surgical planning, prosthesis customization, tissue culture and \u0000biosensor manufacturing and so on. Its wide application is due to its digital model, \u0000which makes the whole manufacturing process easier to digitize, so it is more \u0000conductive to updating and customization of products via 3D printing.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"10 1","pages":"25-33"},"PeriodicalIF":0.0,"publicationDate":"2020-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46410814","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}
引用次数: 9
Port-Hamiltonian Based Control of the Sun-Earth 3D Circular Restricted Three-Body Problem: Stabilization of the L1 Lagrange Point 基于port - hamilton的太阳-地球三维圆形受限三体问题控制:L1拉格朗日点的稳定
现代机械工程(英文) Pub Date : 2020-08-10 DOI: 10.4236/mme.2020.103005
Hao Yan
{"title":"Port-Hamiltonian Based Control of the Sun-Earth 3D Circular Restricted Three-Body Problem: Stabilization of the L1 Lagrange Point","authors":"Hao Yan","doi":"10.4236/mme.2020.103005","DOIUrl":"https://doi.org/10.4236/mme.2020.103005","url":null,"abstract":"In this paper, we use \u0000Port-Hamiltonian framework to stabilize the Lagrange points in the Sun-Earth three-dimensional Circular Restricted Three-Body \u0000Problem (CRTBP). Through rewriting the CRTBP into Port-Hamiltonian framework, \u0000we are allowed to design the feedback controller through energy-shaping \u0000and dissipation injection. The closed-loop Hamiltonian is a candidate of the Lyapunov function to establish \u0000nonlinear stability of the designed equilibrium, which enlarges the application \u0000region of feedback controller compared with that based on linearized dynamics. \u0000Results show that the \u0000Port-Hamiltonian approach \u0000allows us to successfully stabilize the Lagrange points, where the Linear \u0000Quadratic Regulator (LQR) may fail. The feedback system based on Port-Hamiltonian approach is also robust against white \u0000noise in the inputs.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46929632","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}
引用次数: 1
Water Production by Condensation of Wet Air 湿空气冷凝制水
现代机械工程(英文) Pub Date : 2020-01-01 DOI: 10.4236/mme.2020.102002
L. O. Ebale, G. N’kaya, Wilfrid Kombo, Feldha Kibongani
{"title":"Water Production by Condensation of Wet Air","authors":"L. O. Ebale, G. N’kaya, Wilfrid Kombo, Feldha Kibongani","doi":"10.4236/mme.2020.102002","DOIUrl":"https://doi.org/10.4236/mme.2020.102002","url":null,"abstract":"It is now assumed that climate warming is effective and noticeable. It not only leads to a lack of water that is increasing in desert areas, but it must be kept in mind that the inhabitants of the villages located in the geographical areas whose access to water is difficult, make binding efforts to gain access to water. This article proposes to present the possibility of obtaining water by the condensation of the water vapors of the air by applying the thermodynamic processes of the humid air as well as those of the refrigerating installations. In fact, atmospheric air contains suspended water vapors. When this steam cools below its rose point, there is condensation if water vapors and liquid water or ice appears. It was obtained a quantity of condensed vapors in a refrigeration facility. This amount is directly proportional to the refrigeration power whose efficiency can be improved by the use of photovoltaic energy given the reduced financial cost of this energy. This seems to be a hope among the possible solutions to be considered for the resolution of the water issue.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70497388","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}
引用次数: 0
Millimeter-Scale Liquid Droplet Migration on Solid Surface with Temperature Gradient: A Simulation Investigation 具有温度梯度的毫米尺度液滴在固体表面的迁移:模拟研究
现代机械工程(英文) Pub Date : 2020-01-01 DOI: 10.4236/mme.2020.103004
Jingyuan Zheng
{"title":"Millimeter-Scale Liquid Droplet Migration on Solid Surface with Temperature Gradient: A Simulation Investigation","authors":"Jingyuan Zheng","doi":"10.4236/mme.2020.103004","DOIUrl":"https://doi.org/10.4236/mme.2020.103004","url":null,"abstract":"In this paper, we established a time-dependent model that investigates the migration behavior of a millimeter-scale liquid droplet on a solid surface with temperature gradient. Both fluid mechanics and heat transfer are incorporated in the model. The Navier-Stokes equation is employed both inside and outside the droplet. Size variation is observed in the transient simulation. Results show that the velocity of the migration is about 1.7 mm/s under a temperature gradient of 30 K/mm. The model is consistent with results with previous literatures.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70497430","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}
引用次数: 1
Disassembly Evaluation in Design of a System Using a Multi-Parameters Index 基于多参数指标的系统可拆卸性评价
现代机械工程(英文) Pub Date : 2019-11-18 DOI: 10.4236/mme.2019.94007
Aslain Brisco Ngnassi Djami, W. Nzié, Serge Doka Yamigno
{"title":"Disassembly Evaluation in Design of a System Using a Multi-Parameters Index","authors":"Aslain Brisco Ngnassi Djami, W. Nzié, Serge Doka Yamigno","doi":"10.4236/mme.2019.94007","DOIUrl":"https://doi.org/10.4236/mme.2019.94007","url":null,"abstract":"In order \u0000to help designers, consider disassembly in their design activities, a method \u0000for evaluation of product disassembly is proposed. Criteria characterizing the \u0000disassembility of a product are identified. Each criterion is assigned a \u0000coefficient, thus proposing an index of easy fixations (Iff) \u0000 as a design indicator to evaluate the level of \u0000disassembly of a solution generated by the designer. This index is calculated \u0000as a weighted average of the indicators for evaluating the disassembility of \u0000the product. The proposed method uses information such as the list of subsets \u0000or parts, the component tree, the part geometry, the functional links between \u0000components and parts, the properties of the components. It has been tested on one \u0000product: the soy roaster.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45135788","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}
引用次数: 2
Coupling for Parallel Non-Collinear Shafts 并联非共轴线耦合
现代机械工程(英文) Pub Date : 2019-08-30 DOI: 10.4236/mme.2019.93006
R. Chicurel, G. Ascanio
{"title":"Coupling for Parallel Non-Collinear Shafts","authors":"R. Chicurel, G. Ascanio","doi":"10.4236/mme.2019.93006","DOIUrl":"https://doi.org/10.4236/mme.2019.93006","url":null,"abstract":"A novel coupling for two parallel shafts with non-collinear axes has been developed and used in a cycloidal transmission with magnetic gears. Such a coupling has been designed as an alternative to traditional couplings to transmit the rotation from the orbiting gear to the output shaft. The driving shaft transmits a couple consisting of two equal and opposite forces to a central element which, in turn, transmits the same couple, also consisting of two equal and opposite forces to the driven shaft. This novel coupling was successfully used instead of a traditional coupling resulting in, not only a smother operation, but also a more efficient power transmission.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47596519","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}
引用次数: 1
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