International Journal of Engineering Materials and Manufacture最新文献

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Validation and Verification of CFD Prediction of Fluid Flow of a Submerged Vertical Round Jet 水下垂直圆射流流场CFD预测的验证与验证
International Journal of Engineering Materials and Manufacture Pub Date : 2018-06-15 DOI: 10.26776/IJEMM.03.02.2018.06
N. Hasan, A. Rahman, Md.S. Alam
{"title":"Validation and Verification of CFD Prediction of Fluid Flow of a Submerged Vertical Round Jet","authors":"N. Hasan, A. Rahman, Md.S. Alam","doi":"10.26776/IJEMM.03.02.2018.06","DOIUrl":"https://doi.org/10.26776/IJEMM.03.02.2018.06","url":null,"abstract":"This paper presents a step by step verification and validation process of a vertical round submerged jet into a cylindrical bath. Taking advantage of the axi-symmetric domain, Navier-Stokes equation of primary is solved by finite volume method (FVM) using commercial computational fluid dynamics, CFD (Fluent) software. For verification and to minimise the computational error, step by step grid independence tests were performed. For validation, experimental data was produced using laser Doppler velocimetry (LDV). Among the turbulence model,  SST was found to predict the flow behaviour better than k-e-  realization or RSM models. ","PeriodicalId":201987,"journal":{"name":"International Journal of Engineering Materials and Manufacture","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126653688","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: 4
Modelling and optimization of Chromium Powder Mixed EDM Parameter Effect Over the Surface Characteristics by Response Surface Methodology Approach 响应面法模拟和优化铬粉混合电火花加工参数对表面特性的影响
International Journal of Engineering Materials and Manufacture Pub Date : 2018-06-08 DOI: 10.26776/IJEMM.03.02.2018.02
Nor Ain Binti Jamil Hosni, M. A. Lajis, M. Idris
{"title":"Modelling and optimization of Chromium Powder Mixed EDM Parameter Effect Over the Surface Characteristics by Response Surface Methodology Approach","authors":"Nor Ain Binti Jamil Hosni, M. A. Lajis, M. Idris","doi":"10.26776/IJEMM.03.02.2018.02","DOIUrl":"https://doi.org/10.26776/IJEMM.03.02.2018.02","url":null,"abstract":"In this paper, an optimization of chromium powder mixed parameters effect, i.e. discharge current, pulse on time and Cr powder concentration of AISI D2 steels in Powder Mixed EDM (PMEDM) has been made. RSM has been employed to plan and analyzed the experiment. Central composite design (CCD) was chosen as the RSM design that is useful for investigating the quadratic effects. The version 8.0 of the Design Expert software was used to develop the experimental plan for RSM. A mathematical model in the form of the multiple regression equation for second order response surface with the best fittings was developed. The results identify that discharge current and pulse on time the most important parameters effect to minimize recast layer. With the topmost desirability solution, the suggested optimum parameter of discharge current is 20.12 A, pulse-on time 50.14 µs and 3.96 g/L powder concentration to minimize recast layer.","PeriodicalId":201987,"journal":{"name":"International Journal of Engineering Materials and Manufacture","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128957525","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: 8
Parametric Effect on Surface Finish of Three-Dimensional Printed Object 参数对三维打印物体表面光洁度的影响
International Journal of Engineering Materials and Manufacture Pub Date : 2018-06-04 DOI: 10.26776/IJEMM.03.02.2018.04
M. Hasan, Shugata Ahmed, Ron Voldman, Mirt Mehany
{"title":"Parametric Effect on Surface Finish of Three-Dimensional Printed Object","authors":"M. Hasan, Shugata Ahmed, Ron Voldman, Mirt Mehany","doi":"10.26776/IJEMM.03.02.2018.04","DOIUrl":"https://doi.org/10.26776/IJEMM.03.02.2018.04","url":null,"abstract":"The ability to use different parameters and finishing techniques in fused deposition modelling (FDM) depends largely on part geometries, materials, printing processes like Z-resolution and post processing to some extent. Low quality poor surface finish due to layer ovality, improper Z-resolution parameter selection and fill of the empty shell in three-dimensional (3D) printing, results unexpected texture and appearance. An investigation is carried out on the effects of Z-resolution (0.15 mm to 0.40 mm) and Fill parameters on flat and curved surface objects manufactured using the FDM process. Moreover, post surface treatment was performed using acetone. It was found that average surface roughness increases with increasing Z-resolution. Solid Fill can create a smoother surface as oppose to Sparse Fill. Surface roughness improves significantly after post treatment with organic solvent acetone.","PeriodicalId":201987,"journal":{"name":"International Journal of Engineering Materials and Manufacture","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115722518","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
Greenhouse Gas Emission of Broiler Chicken Production in Malaysia using Life Cycle Assessment Guidelines: A Case Study 使用生命周期评估指南的马来西亚肉鸡生产温室气体排放:案例研究
International Journal of Engineering Materials and Manufacture Pub Date : 2018-06-04 DOI: 10.26776/IJEMM.03.02.2018.03
S. Suffian, A. A. Sidek, T. Matsuto, M. A. Al Hazza, H. Yusof, A. Hashim
{"title":"Greenhouse Gas Emission of Broiler Chicken Production in Malaysia using Life Cycle Assessment Guidelines: A Case Study","authors":"S. Suffian, A. A. Sidek, T. Matsuto, M. A. Al Hazza, H. Yusof, A. Hashim","doi":"10.26776/IJEMM.03.02.2018.03","DOIUrl":"https://doi.org/10.26776/IJEMM.03.02.2018.03","url":null,"abstract":"The aim of this research was to evaluate the level of greenhouse gas emission from broiler chicken farming industry in Malaysia. In order to achieve that, Life Cycle Assessment method was chosen as a framework to complete the task. A case study was conducted at a broiler chicken farm to gather the data and information related to the broiler chicken production. Cradle-to-gate assessment including distribution stage was conducted based on the ISO14040/1044 guidelines. Inventory data for this case study was gathered in collaboration with one of the selected case study broiler chicken farm company. Greenhouse gas emission that consists of several most affected gases such as carbon dioxide, methane and nitrous oxide was studied. Result shows that the highest carbon dioxide emission came from manure, which accounted for 1,665,342 kg CO2 equivalent per total broilers while the highest methane emission came from feed, which accounted for 126,207.84 g CH4 equivalent per total broilers. For nitrous oxide emission, the highest values came from bedding which accounted for 20,316.87 g N2O equivalent per total broilers in the commercial modern broiler chicken farm. In this case study, it can be concluded that manure gives the most prominent effect to the greenhouse gas emission followed by feed and bedding materials. ","PeriodicalId":201987,"journal":{"name":"International Journal of Engineering Materials and Manufacture","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114533483","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: 4
Effect of UV Radiation on Degradation of Durian Skin Fibre Composite 紫外线辐射对榴莲皮纤维复合材料降解的影响
International Journal of Engineering Materials and Manufacture Pub Date : 2018-06-04 DOI: 10.26776/IJEMM.03.02.2018.05
Siti Munirah Salimah Abd Rashid, H. Anuar, Siti Nur E’zzati Mohd Apandi, Y. Buys
{"title":"Effect of UV Radiation on Degradation of Durian Skin Fibre Composite","authors":"Siti Munirah Salimah Abd Rashid, H. Anuar, Siti Nur E’zzati Mohd Apandi, Y. Buys","doi":"10.26776/IJEMM.03.02.2018.05","DOIUrl":"https://doi.org/10.26776/IJEMM.03.02.2018.05","url":null,"abstract":"Durian skin fibre (DSF) reinforced high-density polyethylene (HDPE) composite was fabricated by melt-blending and then compression moulded. As DSF is polar and hydrophilic in nature, while HDPE is non-polar and hydrophobic, thus the adhesion between them is low. Therefore, maleic anhydride-grafted-polyethylene (MAPE) was added to enhance the interaction of HDPE and DSF. This paper highlight the effect of MAPE on UV degradation exposure on HDPE/DSF composite. DSF content from 10, 20, 30 and 40 wt% were immersed in water for 70 days. In the absence of MAPE, water absorption increased with DSF loadings. Furthermore, tensile properties of HDPE/DSF composite was degraded after 500, 1000 and 2000 h of UV radiation exposure. Morphological observation under SEM showed that the fibre and matrix became less interacted after exposed to UV radiation. Voids and gaps between HDPE and DSF in the presence of MAPE were reduced as revealed under SEM micrographs. The colour index of the HDPE/DSF composite was increased and became whiter with UV radiation exposure. This showed that MAPE significantly improved the interaction of HDPE/DSF composite.","PeriodicalId":201987,"journal":{"name":"International Journal of Engineering Materials and Manufacture","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121556120","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
Statistical Monitoring and Optimization of Electrochemical Machining using Shewhart Charts and Response Surface Methodology 基于Shewhart图和响应面法的电化学加工统计监测与优化
International Journal of Engineering Materials and Manufacture Pub Date : 2018-06-04 DOI: 10.26776/IJEMM.03.02.2018.01
A. Maged, S. Haridy, M. Shamsuzzaman, I. Alsyouf, Roubi A. Zaied
{"title":"Statistical Monitoring and Optimization of Electrochemical Machining using Shewhart Charts and Response Surface Methodology","authors":"A. Maged, S. Haridy, M. Shamsuzzaman, I. Alsyouf, Roubi A. Zaied","doi":"10.26776/IJEMM.03.02.2018.01","DOIUrl":"https://doi.org/10.26776/IJEMM.03.02.2018.01","url":null,"abstract":"The response surface methodology (RSM) and Shewhart control charts have been widely used in manufacturing to reduce variation, improve quality and optimize the output. This article proposes an application of individuals & moving range chart (I&MR) and RSM in electrochemical machining. The Shewhart-type I&MR control chart and RSM are combined together in an effective way to successfully guarantee the statistical control of the surface roughness (Ra) of the items produced by wire electrochemical turning, and meanwhile optimize Ra by exploring the optimal values of the machining parameters including applied voltage, wire feed rate, wire diameter, rotational speed and overlap distance. The conducted experiments reveal that the optimal values of the aforementioned factors are 23.67, 0.5, 0.2, 900 and 0.02, respectively.  A second-order regression model is also developed to predict the output (Ra) at different combinations of the input parameters. The developed regression model can predict the output values with a determination coefficient (R2) of 96.9%. The proposed combined scheme of Shewhart charts and RSM can be employed in other manufacturing processes and even in different service sectors to efficiently enhance the performance and reduce the cost.","PeriodicalId":201987,"journal":{"name":"International Journal of Engineering Materials and Manufacture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129781216","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: 11
Characteristics Analysis of Dual Bell Nozzle using Computational Fluid Dynamics 基于计算流体力学的双钟形喷嘴特性分析
International Journal of Engineering Materials and Manufacture Pub Date : 2017-12-01 DOI: 10.26776/IJEMM.04.01.2019.02
Y. M. Akib, Asif Kabir, M. Hasan
{"title":"Characteristics Analysis of Dual Bell Nozzle using Computational Fluid Dynamics","authors":"Y. M. Akib, Asif Kabir, M. Hasan","doi":"10.26776/IJEMM.04.01.2019.02","DOIUrl":"https://doi.org/10.26776/IJEMM.04.01.2019.02","url":null,"abstract":"Space exploration and space tourism have now become a raging competition among the developed nations. For this reason, different types of advanced rocket nozzles with prospective privileges are introduced. Altitude adaptive dual bell nozzle will soon replace the conventional nozzles for the first stage rocket launcher. Indeed, this nozzle has auto adaption capability based on altitude. The major feature of a dual bell nozzle is the two bell-shaped contours separated by an inflection point. This nozzle has left rooms for researchers to test different flight conditions and transition characteristics. In this paper, a dual bell nozzle contour has been developed in MATLAB and analysed for different thermodynamic parameters. ANSYS Fluent is used in analysing flow through the nozzle. Shadowgraph imaging technique is used for measuring density gradient and compared it with fluent results. The simulations were performed by using the k-epsilon turbulence model.","PeriodicalId":201987,"journal":{"name":"International Journal of Engineering Materials and Manufacture","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114991252","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: 4
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