Journal of applied mechanical engineering最新文献_第7页

Experimental and Theoretical Analysis of the Chip Flow Direction inTurning using Flatted and Grooved Inserts Ã¢ÂÂ Impact of the Tool Rake FaceGeometry, the Work Material and Cutting Conditions 平槽刀片车削中切屑流向的实验与理论分析ÃⅱÂÂ刀具前刀面几何形状、加工材料及切削条件的影响

Journal of applied mechanical engineering Pub Date : 2017-06-06 DOI: 10.4172/2168-9873.1000269

S. Kouadri, A. Bensari, M. Tirenifi

{"title":"Experimental and Theoretical Analysis of the Chip Flow Direction inTurning using Flatted and Grooved Inserts Ã¢ÂÂ Impact of the Tool Rake FaceGeometry, the Work Material and Cutting Conditions","authors":"S. Kouadri, A. Bensari, M. Tirenifi","doi":"10.4172/2168-9873.1000269","DOIUrl":"https://doi.org/10.4172/2168-9873.1000269","url":null,"abstract":"This paper deals mainly with an experimental and theoretical analysis of the Chip Flow Direction (CFD) in turning \u0000 process using flatted and grooved inserts. Turning tests have been performed to determine the CFD from measured \u0000 cutting force components. Different cutting conditions have been considered by varying the cutting speed, the feed \u0000 rate and the depth of cut. From a theoretical point of view, two models have been applied. The first one is an analytical \u0000 model based on the discretization of the undeformed chip area. The second one is a purely geometrical model \u0000 which assumes the CFD normal to the major axis of the projected cutting area on the rake face. The effect of cutting \u0000 conditions on the CFD was clearly highlighted experimentally and by adopted models. It has been shown that the \u0000 CFD depends strongly on the depth of cut in the browsed range of cutting parameters, while cutting speed has a little \u0000 effect. One of main discussed results concerns the impact of the tool rake face geometry (flatted and grooved) on the \u0000 CFD. Finally, it has been shown that the CFD is independent on machined materials.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":" ","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2017-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4172/2168-9873.1000269","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44478583","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

Ultrasound Tomography for Spatially Resolved Melt TemperatureMeasurements in Injection Moulding Processes 超声断层成像在注射成型过程中空间分辨熔体温度测量

Journal of applied mechanical engineering Pub Date : 2017-05-26 DOI: 10.4172/2168-9873.1000264

C. Hopmann, J. Wipperfürth

{"title":"Ultrasound Tomography for Spatially Resolved Melt TemperatureMeasurements in Injection Moulding Processes","authors":"C. Hopmann, J. Wipperfürth","doi":"10.4172/2168-9873.1000264","DOIUrl":"https://doi.org/10.4172/2168-9873.1000264","url":null,"abstract":"In injection moulding processes, the measurement of the temperature distribution is very important for the validation of models used for simulative part design due to the high influence on shrinkage and warpage of the moulded part, but is also very challenging to measure. During the injection moulding process high mould pressures occur and the cavity is not easily accessible. Therefore, contact sensors cannot be used since they induce shear stress into the melt, which changes the flow behaviour of the melt and thus the temperature field. In this work, we present a method for the contactless determination of the temperature distribution of a moulded part during injection moulding using ultrasound tomography. With time-of-flight ultrasound measurements from different directions it is possible to reconstruct the distribution of ultrasound velocity in the cross-section of a moulded part. With this distribution, the temperature field can be calculated using additional material characteristic properties. Based on this concept, an injection mould was designed, that allows performing ultrasound tomography with 20 ultrasound transducers radially arranged around a cylindrical shaped cavity. This allows the temperature determination under real process conditions with a spatial resolution of 3.5 mm2. A highly parallelised measurement device allows recording of several complete datasets before no more signals can be detected due to shrinkage of the moulded part. During several injections moulding-cycles all sensor positions were able to detect noticeable signals. Due to internal signal processing of the measurement device, it is not yet possible to calculate arrival times of the ultrasound signal but amplitude-scans show the general feasibility of ultrasound tomography during injection moulding..","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":" ","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44049298","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

Oil Dispersed Polymers Characteristics under External Voltage, Tribologicaland Corrosion Variables 油分散聚合物在外部电压、摩擦和腐蚀变量下的特性

Journal of applied mechanical engineering Pub Date : 2017-05-26 DOI: 10.4172/2168-9873.1000266

Al-Ghamdi Sa, H. Abo-Dief, Mohamed At

引用次数: 0

Peridynamic Modeling and Simulation of Rolling Contact Fatigue 滚动接触疲劳动力学建模与仿真

Journal of applied mechanical engineering Pub Date : 2017-05-06 DOI: 10.4172/2168-9873.1000265

Ghaffari Ma, S. Xiao

引用次数: 0

Welding Applying for Increasing the Service Life of Cast Components ofMetallurgical Equipment 焊接在提高冶金设备铸件使用寿命中的应用

Journal of applied mechanical engineering Pub Date : 2017-05-04 DOI: 10.4172/2168-9873.1000262

Al Quran Fmf, Matarneh Me, V. Chigarev, Loza Av

引用次数: 0

CFD Analysis of Circular Pipe Flat Plate Solar Collector 圆管平板太阳能集热器的CFD分析

Journal of applied mechanical engineering Pub Date : 2017-04-08 DOI: 10.4172/2168-9873.1000278

Akbar Ma, Ashfaq Aa, M. Amjad, T. Manzoor

{"title":"CFD Analysis of Circular Pipe Flat Plate Solar Collector","authors":"Akbar Ma, Ashfaq Aa, M. Amjad, T. Manzoor","doi":"10.4172/2168-9873.1000278","DOIUrl":"https://doi.org/10.4172/2168-9873.1000278","url":null,"abstract":"Solar energy is available in abundance but least used energy source of available renewable energy resources. Solar Energy is being used for some household and commercial purposes like producing steam for commercial usage, heating of water to maintain the indoor temperature of houses etc. Water heating requires heat, which is produced usually with burning of fuels (Methane, Gasoline) and these fuels are costly and causes pollution at burning, but if we use solar energy which is available for almost 10-12 hours in almost every country, we can save a lot. This paper attempts to make the numerical simulation of flat plate solar collectors. Simulation is an important tool for the design and operation control. Design engineers use simulation results to design water heating systems; simulation makes it possible to find the optimal design and operating parameters. In this paper, the computational fluid dynamics (CFD) tools have been used to simulate solar collectors to better understand heat transfer capacity. Three-dimensional model of the U-tube collectors and flat absorber plate is obtained using solid works. The results obtained by the use of ANSYS FLUENT software. The purpose of this work is to better understand the relative computational fluid dynamics flow of the solar collector and the temperature distribution within solar collector. Outlet air temperature and solar radiation are compared and between them there is a good consistency. Our project is basically in our study design optimization, we can use our results to improve the efficiency of flat plate solar collector theory in the future. These results can also be used for design purposes.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":"2017 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2017-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43539848","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

Flow Patterns in an Air Conditioned Playground Zone of Football Stadium 足球场空调操场区域的气流模式

Journal of applied mechanical engineering Pub Date : 2017-04-08 DOI: 10.4172/2168-9873.1000277

E. Khalil, Esmail M. ElBialy, W. Abdelmaksoud, Ashmawy Me

{"title":"Flow Patterns in an Air Conditioned Playground Zone of Football Stadium","authors":"E. Khalil, Esmail M. ElBialy, W. Abdelmaksoud, Ashmawy Me","doi":"10.4172/2168-9873.1000277","DOIUrl":"https://doi.org/10.4172/2168-9873.1000277","url":null,"abstract":"In this paper, research on developing air conditioning systems in playground zone of stadium by employing several kinds of technologies to cool the outdoor spaces. The most serious challenge of air conditioning in playground zone in stadium is difficult to control the temperature and humidity in the outdoor area and also the enormous energy needed by the cooling system to maintain thermal comfort conditions within the football playground area. The main task for the analyzed model was to ensure the better method to distribute air to achieve the human comfortable for players and reduce the cooling capacity of playground zone by covering this zone using a large sunshade to reduce the sun’s rays and maintain the stadium’s temperature. The technical aspect was addressed by developing an empirical mathematical model for the performance of stadium model. The result of the study concludes that the system designed in Qatar stadium for conditioning and distribution air and evaluates results by using Computational Fluid Dynamics CFD code to determine the best way to distribute the air inlets and simulating the flows in air to overcome the high temperature and humidity to reach the human comfortable for players.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":" ","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4172/2168-9873.1000277","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42868797","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

2d Frictional B-Spline Smoothed Mortar Contact Problems Part II:Resolution Phase 二维摩擦B样条光滑砂浆接触问题第二部分：求解阶段

Journal of applied mechanical engineering Pub Date : 2017-04-07 DOI: 10.4172/2168-9873.1000275

A. Kallel, S. Bouabdallah

引用次数: 0

2d Frictional B-Spline Smoothed Mortar Contact Problems Part I: MatchingPhase 二维摩擦B样条光滑砂浆接触问题第一部分：匹配阶段

Journal of applied mechanical engineering Pub Date : 2017-04-07 DOI: 10.4172/2168-9873.1000272

Kallel A, Bouabdallah S

引用次数: 0

Dynamic Analysis of Cam Manufacturing 凸轮制造的动力学分析

Journal of applied mechanical engineering Pub Date : 2017-04-07 DOI: 10.4172/2168-9873.1000274

P. Hh, Nguyen Pv

{"title":"Dynamic Analysis of Cam Manufacturing","authors":"P. Hh, Nguyen Pv","doi":"10.4172/2168-9873.1000274","DOIUrl":"https://doi.org/10.4172/2168-9873.1000274","url":null,"abstract":"In cam milling process, cutting force is a variant factor during every time period and cam has a quite complex profile that leads to alternate force direction. These consequently, create machine vibration. The dynamic behaviour of machine can be predicted approximately if it is represented by a mathematical model. This paper shows result of cam cutting machine’s dynamic, which used Lagrange’s equation to solve. In this case, the machine vibration is surveyed only dimensions such as X and Y through using cutting condition with alloy cutting tool to mill a 10 mm thickness steel cam. The machine is modelled into the two degree of freedom vibrating system follow X and Y direction. Each of X and Y table equal to the compound: stiffness, damper and mass, which applied as constant coefficients in Lagrange’s equation. On the other hand, analysing cam characteristic and milling process in detail provides the resultant cutting follow X and Y in order to become external force of previous equation. After giving data in sufficient that necessary for problem, Matlab Simulink displays the vibration of X, Y for two states tangent force factor Kt=299.3 and Kt=598.6. At the end, it gives a comparison between these states.","PeriodicalId":90573,"journal":{"name":"Journal of applied mechanical engineering","volume":" ","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4172/2168-9873.1000274","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41436745","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