International Journal of Mechanical Engineering and Applications最新文献_第10页

Developing of Heating and Cooling Universal System Sourced by New Type of Heat Pump and Method for Its Design 新型热泵供冷供热通用系统的研制及其设计方法

International Journal of Mechanical Engineering and Applications Pub Date : 2017-06-27 DOI: 10.11648/j.ijmea.20170503.16

Z. Melikyan, T. Movsesyan

引用次数: 1

Design of Multi Hole Machining Equipment for Flange Parts Based on CAD/CAM 基于CAD/CAM的法兰零件多孔加工设备设计

International Journal of Mechanical Engineering and Applications Pub Date : 2017-05-23 DOI: 10.11648/J.IJMEA.20170503.15

Shuangxi Jing, Xiaoyu Yang, Chenxu Luo, Jinle Yuan, Zhipeng Luo

引用次数: 0

Non-newtonian Rabinowitsch Fluid Effects on the Lubrication Performances of Sine Film Thrust Bearings 非牛顿拉宾诺维奇流体对正弦膜止推轴承润滑性能的影响

International Journal of Mechanical Engineering and Applications Pub Date : 2017-05-20 DOI: 10.11648/J.IJMEA.20170503.14

J. Lin, H. Chiang, Y. Chiu

引用次数: 0

Mathematical Modeling for Material Removal and Optimization of Ultrasonic Drilling of Polycarbonate and Acrylic Glass for Surface Roughness by GRA Approach 基于GRA法的聚碳酸酯和丙烯酸玻璃超声钻孔材料去除数学建模及表面粗糙度优化

International Journal of Mechanical Engineering and Applications Pub Date : 2017-05-17 DOI: 10.11648/J.IJMEA.20170503.12

K. Singh, I. Ahuja, Jatinder Kapoor

{"title":"Mathematical Modeling for Material Removal and Optimization of Ultrasonic Drilling of Polycarbonate and Acrylic Glass for Surface Roughness by GRA Approach","authors":"K. Singh, I. Ahuja, Jatinder Kapoor","doi":"10.11648/J.IJMEA.20170503.12","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20170503.12","url":null,"abstract":"Polycarbonate bullet proof and acrylic heat resistant glasses are used as the functional material in many industrial application. In automobile industries, banks and cabins, polycarbonate bullet proof glass has been used for security purpose. Similarly, acrylic heat resistant glass is used in furnace, microwaves, space craft and airplane applications. In this experimental research paper, Taguchi modal and Grey relational analysis are utilized for the ultrasonic drilling in these materials. For experimentation, input parameters are concentration, abrasive, grit size, power rating, hydrofluoric acid and tool materials. Output parameters are material removal rate, tool wear rate and surface roughness. In which, surface roughness is most significant output parameter, because it describe accuracy of the process. Through optimization analysis, Taguchi modal suggest that 40% abrasive concentration, mixture of (Alumina, Silicon carbide and Boron carbide) abrasive in 1:1:1, 600 grit of abrasive and 1.5% hydrofluoric acid gives best results for drilling in polycarbonate bullet proof glass material. Similarly, in acrylic heat resistant glass, mixture of Silicon carbide and Boron carbide (1:1), 600 grit abrasive and 1% hydrofluoric acid gives the optimum results. Concentration of slurry, abrasive grit size and hydrofluoric acid are the most significant parameters for ultrasonic drilling in both materials. Through Grey relational analysis the surface roughness is improved by 40% and 48% in polycarbonate (UL-752) and acrylic (BS-476) glass respectively.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124768072","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

Optimization of Molding Sand Composition for Casting Al Alloy 铝合金铸造型砂成分的优化

International Journal of Mechanical Engineering and Applications Pub Date : 2017-05-17 DOI: 10.11648/J.IJMEA.20170503.13

Sumaiya Shahria, M. Tariquzzaman, Md. Habibur Rahman, Md. Al Amin, Md. Abdur Rahman

引用次数: 18

Suppression of Oscillation of a Certain Two-Mass System with the Help of the Generalized Gauss Principle 用广义高斯原理抑制某双质量系统的振荡

International Journal of Mechanical Engineering and Applications Pub Date : 2017-05-10 DOI: 10.11648/j.ijmea.20170503.11

Kamilla Maratovna Fazlyeva, T. Shugailo, M. Yushkov

{"title":"Suppression of Oscillation of a Certain Two-Mass System with the Help of the Generalized Gauss Principle","authors":"Kamilla Maratovna Fazlyeva, T. Shugailo, M. Yushkov","doi":"10.11648/j.ijmea.20170503.11","DOIUrl":"https://doi.org/10.11648/j.ijmea.20170503.11","url":null,"abstract":"The paper studies the suppression of oscillation of a certain two-mass system when it is transferred from the initial state of rest to the given state of rest during a time interval prescribed. The problem is solved by the two methods: the Pontryagin maximum principle (first method) and the generalized Gauss principle (second method). Computational results are presented and the solutions are compared to each other. When the time of motion is short the both methods give practically the same results, but when the time of motion is long the results differ widely. If the time of motion is long then the second method is more preferable than the first one, since the control obtained by the second method sways the mechanical system less than the control obtained by the classical approach. This can be explained by the fact that the first method contains the control including harmonics with the natural frequency of the system, and this seeks to put the system into resonance. In contrast to this, in the second method the control is sought in the form of time polynomial that provides relatively smooth motion of the system. It is noted that the first method always finds the control with jumps at the beginning and at the end of motion. The second method also gives the same jumps when the time of motion is short, but when the time of motion is long the similar jumps vanish when one uses the generalized Gauss principle.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127653368","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

Numerical Simulation of Heat Transfer Performance of Calender Roll Structure in Glass Calendering 玻璃压延轧辊结构传热性能的数值模拟

International Journal of Mechanical Engineering and Applications Pub Date : 2017-05-10 DOI: 10.11648/J.IJMEA.20170502.17

Geng Tie, Sheng Jie, Hu Jinzhong

引用次数: 1

Research on Time-Variant Wear Reliability of Gear Rack 齿轮齿条时变磨损可靠性研究

International Journal of Mechanical Engineering and Applications Pub Date : 2017-04-21 DOI: 10.11648/j.ijmea.20170502.16

Chen Li, W. Decheng, L. Hongqi, Cheng Peng, Shao Chenxi

引用次数: 1

Design, Manufacture and Performance Evaluation of an Effective Dual Operated Groundnut Decorticator with Blower 风机双操作花生脱皮机的设计、制造及性能评价

International Journal of Mechanical Engineering and Applications Pub Date : 2017-03-28 DOI: 10.11648/J.IJMEA.20170502.15

Enoch Asuako Larson, Philip Yamba, A. Akayeti, Samuel Adu-Gyamfi

{"title":"Design, Manufacture and Performance Evaluation of an Effective Dual Operated Groundnut Decorticator with Blower","authors":"Enoch Asuako Larson, Philip Yamba, A. Akayeti, Samuel Adu-Gyamfi","doi":"10.11648/J.IJMEA.20170502.15","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20170502.15","url":null,"abstract":"A manual ( hand operated or bicycle paddle ) groundnut decorticating machine attached with a blower is designed, manufactured and its performance assessed. The main components of the machine were the frame, hopper, neck feed control gate, shelling drum, shaft running on bearings, a pneumatic type mechanism, concave sieve and a blower. The rest are pulley and sprocket, discharge outlet and belt drive. The assembled angle iron parts were welded together whiles the sheet metal parts were riveted to hold in position. Testing of the decorticating machine was assessed at three different moisture contents of groundnut (0, 5.1 and 9.3%) and three different levels of machine shaft speed (10, 20 and 30 rpm) all at an average feed rate of 25kg/hr. The results revealed that the decorticating machine’s optimum performance was at 20 rpm machine shaft speed with groundnut moisture content of 0% (purely dry), machine cracking efficiency and percentage groundnut fully cracked was 71.2% and 85.3% respectively. There was reduction in machine performance at machine speeds of 10 rpm and 30 rpm with 45.1%, and 49.7% machine cracking efficiency respectively for the same feed gate rate openings. This was because at a speed of 10 rpm, the nuts were partially cracked (41.6%) and that of 30 rpm and cracked (39.3%), the quantum of groundnut losses through the blower increased considerably leading to a reduction in the quantity of groundnut collected.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124848351","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

A New Approach to Manage Welding Quality in Supply Chain Networks: A Supplier Network Complaints Perspective 供应链网络中焊接质量管理的新途径:供应商网络投诉视角

International Journal of Mechanical Engineering and Applications Pub Date : 2017-03-28 DOI: 10.11648/j.ijmea.20170502.14

J. Toivanen, H. Eskelinen, P. Kah, J. Martikainen, Pia Heilmann

引用次数: 0