Journal of Mechanical Engineering and Sciences最新文献_第8页

Low-cost Polyurethane Coating as Dielectric Component in Digital Microfluidics 低成本聚氨酯涂层作为数字微流体介质元件

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21082

E. N. Abdul Latip, L. Coudron, M. Tracey

{"title":"Low-cost Polyurethane Coating as Dielectric Component in Digital Microfluidics","authors":"E. N. Abdul Latip, L. Coudron, M. Tracey","doi":"10.24191/jmeche.v20i1.21082","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21082","url":null,"abstract":"Digital microfluidics (DMF) as a platform for precise handling of liquid droplets is a powerful tool but the affordability of the device has been one of the hindrances to its wide implementation. This paper reports the development of DMF devices using low-cost materials and simple deposition techniques specifically for the device dielectric component. Three commercial polyurethane coatings were investigated for their feasibility as the dielectric layer. The electrowetting behaviour of these materials was investigated by evaluating the change in contact angle with applied voltage of a water droplet sitting on the dielectric samples prepared using easy deposition methods such as spraying and spin coating. Devices were then fabricated using these materials to evaluate their capability to actuate droplets. Five types of polyurethane dielectric sample exhibited contact angle reversibility with hysteresis ranging between 4° to 25° after 250 VDC application. Droplet transportation back and forth across 8 electrodes at 180 VRMS has been demonstrated in a device made of one of the polyurethane coatings using a spraying technique. This result implies the potential of using polyurethane for future development of low-cost and disposable DMF devices.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76177687","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

The Effects of Beeswax Additions on the Structural, Thermal, Mechanical and Mass Loss Properties of Soy Wax Blends 蜂蜡添加量对大豆蜡共混物结构、热、力学和质量损失性能的影响

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21079

Sharifah Imihezri Syed Shaharuddin, Mohd Ashhar Mansor, M. Abdul Rashid, N. Shaffiar, Z. Ahmad

{"title":"The Effects of Beeswax Additions on the Structural, Thermal, Mechanical and Mass Loss Properties of Soy Wax Blends","authors":"Sharifah Imihezri Syed Shaharuddin, Mohd Ashhar Mansor, M. Abdul Rashid, N. Shaffiar, Z. Ahmad","doi":"10.24191/jmeche.v20i1.21079","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21079","url":null,"abstract":"The typical of beeswax, dammar, rosin, paraffin, and microcrystalline wax. batik wax compositions used in Malaysia consist of various blends This study aims to characterize soy wax/beeswax blends’ structural, thermal, strength, and mass loss properties as potential alternative batik wax compositions. The Fourier transform infrared spectroscopy (FTIR) results showed that the additions of beeswax (wt%) into soy wax resulted in possible chemical interaction for the esters (C=O stretching and C-H bending vibrations), hydrocarbons (CH2 scissor formation), and cholestral esters (C=O stretching vibrations). The thermal profile obtained via differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) respectively revealed an increase in peak melting temperature and reduced thermal stability of the blends with further increments of beeswax. In addition, beeswax enhances the compression strength by 150% but did not have any significant impact on the modulus of the blends. E valuation of the mass loss test suggested that beeswax in the range of 40 wt% to 60 wt% can be considered as alternative batik resist material due to its moderate leaching tendency. Future works shall be conducted to evaluate the performance of these wax compositions against other batik wax criteria and the feasibility of printing these waxes using an in-house designed batik printer.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81324960","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

Investigative Studies on Performance Behavior on an IDI diesel engine with a Geometrically Modified Swirl Chamber using Biodiesel Blends 生物柴油混合燃料涡流室几何修正型IDI柴油机性能研究

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21080

M. S, Ramakrishna N Hegde

{"title":"Investigative Studies on Performance Behavior on an IDI diesel engine with a Geometrically Modified Swirl Chamber using Biodiesel Blends","authors":"M. S, Ramakrishna N Hegde","doi":"10.24191/jmeche.v20i1.21080","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21080","url":null,"abstract":"In this experimental study, combustion, performance and emission characteristics of conventional swirl chamber (CSC) and geometrically modified swirl chamber (GMSC) of IDI diesel engines were studied. A GMSC was designed and fabricated in a separated engine head, for performance testing and comparison purpose. Biodiesel from chia seed oil was extracted by transesterification process and blended with diesel based on volumetric ratios of 5% to 25%, in steps of 10% increase. The performance and emission characteristics of biodiesel blends were compared with petroleum diesel using the CSC and GMSC. The result shows BTE of biodiesel blend BC05, BC15 and BC25 using the GMSC are 3.18%, 0.21% and 1.19% lesser compared to CSC 75% load. In-cylinder pressure of blends BC05, BC15 and BC25 are 66.3 bar, 59.04 bar and 54.34 bar with GMSC. BSFC of BC05, BC15 and BC25 with GMSC are 2.56%, 9.38% and 11.95% higher compared to diesel due to the low CV of biodiesel. NOx emissions for diesel, BC05, BC15 and BC25 are 9.47%, 18.41%, 6.98% and 1.67% respectively less at 75% load with GMSC compared to CSC. From the performance and emission characteristics blend B15 may be recommended as a promising substitute for petroleum diesel.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87075397","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

Shielding Cosmic Ray Muon using Copper and Aluminium Sheets Composited with Polyethylene Sheets for a Better Protection 用铜铝片与聚乙烯片复合来屏蔽宇宙射线μ子

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21081

T. Gaaz, Malik N. Hawas

{"title":"Shielding Cosmic Ray Muon using Copper and Aluminium Sheets Composited with Polyethylene Sheets for a Better Protection","authors":"T. Gaaz, Malik N. Hawas","doi":"10.24191/jmeche.v20i1.21081","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21081","url":null,"abstract":"Muons are usually among the most common secondary cosmic ray particles on Earth's surface. Muon research has confirmed their occurrence in a variety of locales. It has been claimed that cosmic radiation in general, and muons in particular, have disastrous consequences on biological things and electrical components on Earth and in space. According to medical sources, cosmic rays have been linked to many ailments affecting people and other creatures. Because of these issues, cosmic ray shielding has become a crucial component of this and comparative studies. Muons emitted by cosmic rays were detected using a muon telescope made of coaxial Geiger-Muller (GM) tubes. This experiment was carried out within the muon lab of Universiti Kebangsaan Malaysia (UKM) in Malaysia to examine how the cosmic ray muon count fluctuates with the shielding of metals (Copper (Cu) and Aluminium (Al)) and polyethylene. The measured muon count for each metal sample was statistically analysed. Using both metals as shielding in this experiment revealed that adding additional Cu and Al sheets reduced the muon count. Generally, the numbers drop as the thickness increases. The results suggest that Cu outperforms Al in shielding efficacy (19% vs 16%). Because Cu has a more significant density than Al, the correlation coefficient R2 for Cu = 0.9372 is greater than R2 for Al = 0.6593, indicating that the trend for Cu is better than the trend for Al in this experiment. To study the shielding capabilities of the two composites, Al/PE and Cu/PE, ten sheets of Polyethylene (PE) were gradually put individually between the Al and Cu sheets. The results showed that PE sheets slightly increased cosmic ray shielding.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84686582","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

Computational Numerical Analysis of a Magnetic Flux Permanent Magnet with Different Shape for The Development of a Hybrid Generator 用于混合式发电机研制的不同形状永磁体的磁通计算数值分析

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21087

M. Bahari, M. Firdaus, Z. Mohamed, M. H. M.Ramli

{"title":"Computational Numerical Analysis of a Magnetic Flux Permanent Magnet with Different Shape for The Development of a Hybrid Generator","authors":"M. Bahari, M. Firdaus, Z. Mohamed, M. H. M.Ramli","doi":"10.24191/jmeche.v20i1.21087","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21087","url":null,"abstract":"A hybrid generator is one of the attempts to reduce carbon emissions in electricity generation, as it could replace the combustion system currently used in generator sets to generate electricity while increasing carbon emissions. In the hybrid generator system, Lenz's rule of electromagnetic induction is applied in reverse by using a relay to change the polarity of the solenoid coil's electric current. The permanent magnet in the solenoid coil generates mechanical energy (motion) and thereby moves the generator engine, since the permanent magnet is connected to the generator engine via the crankshaft. The objective of this study is to determine and compare the behaviour of N55, N52, N42, N42SH, and samarium-cobalt permanent magnets for the magnet system. The objective of this study is also to find a suitable permanent magnet for use in the magnet system to increase the power generation efficiency. A simple model is simulated to achieve the desired result, including magnetic flux density inside and around the magnets, magnetic field strength calculation, and applied force. The simulations and analysis are performed using ANSYS R19 software and finally all the data are recorded and compared to select the best magnet and develop a prototype. The permanent magnet inside the solenoid plays an important role in the hybrid generator and it is crucial to choose the suitable permanent magnet to increase the efficiency of power generation. From the data, Alliance N-55 permanent magnet has the highestmagnetic force of 131.57 N for 1 mm because it has significantly higher magnetic flux density, magnetic flux intensity and magnetic force.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77719510","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

Laser Powder Bed Fusion Process Optimization of AlSi10Mg Alloy Using Selective Laser Melting: Dynamic Performance of Fatigue Behaviour, Microstructure, Hardness and Density AlSi10Mg合金选择性激光熔化激光粉末床熔合工艺优化:疲劳行为、显微组织、硬度和密度动态性能

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21074

M. Nirish, R. Rajendra, Buschaiah Karolla

{"title":"Laser Powder Bed Fusion Process Optimization of AlSi10Mg Alloy Using Selective Laser Melting: Dynamic Performance of Fatigue Behaviour, Microstructure, Hardness and Density","authors":"M. Nirish, R. Rajendra, Buschaiah Karolla","doi":"10.24191/jmeche.v20i1.21074","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21074","url":null,"abstract":"The quality of a selective laser melting (SLM) component depends on build orientation and layer thickness, which are directly influenced by processing parameters. The present research of layer-by-layer additive simulation before starting the SLM process has several advantages, such as saving time, cost, and material. In this main investigation, the dynamic performance of fatigue strength, density, and hardness of AlSi10Mg alloy was produced by the SLM-AM according to the design of experiments. The L9 orthogonal array of the Taguchi method was created to perform the experimental development process. Finally, the obtained optimal process parameter with the highest values of fatigue strength, density, and hardness was found at a laser power of 225 Watts, a scan speed of 500 mm/s, and a hatching distance of 100 μm. The experimental density result was achieved with a high density value of 99.6% (2.66 g/cm3) and a defect-free component and hardness of 126±5 HV. The future scope of this study will use optimal process parameters to find out mechanical properties for as built and preheated conditions for aerospace applications.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88527072","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

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion 基于硬度准则的径向锻造参数分析方法的发展

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21084

Saeed Darki, E. Y. Raskatov

引用次数: 0

Single Droplet Size and Volume Measurement – Comparison Between Experiment and Theory 单液滴大小和体积测量-实验与理论的比较

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21093

S. Illias, S. Hussain, M. S. Ishak, Md Tasyrif Abdul Rahman, Syamsul Syahrun Awang @ Hashim, S. Selamat, M. Ani

引用次数: 0

Study of Viscoelastic Behavior and Mechanical Characteristics of Graphene-Filled ABS Composites 石墨烯填充ABS复合材料的粘弹性及力学性能研究

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21086

B. Behera, T. M

{"title":"Study of Viscoelastic Behavior and Mechanical Characteristics of Graphene-Filled ABS Composites","authors":"B. Behera, T. M","doi":"10.24191/jmeche.v20i1.21086","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21086","url":null,"abstract":"Acrylonitrile-Butadiene-Styrene (ABS) thermoplastic composites were reinforced with graphene fillers for three different weight ratios of 0.3%, 0.6%, and 0.9%. The compounding was prepared using a twin-screw extruder, and the specimens were made using an injection molding machine. The thermal gravimetric analysis (TGA)study revealed that the thermal stability of ABS composites was improved (~7%) by adding graphene fillers in pure ABS.The tensile and flexural strength of the ABS/grapheme composites was maximumwith the addition of 0.6 wt% graphene fillers. But the impact strength was reduced (~42%) for the addition of graphene fillers of more than 0.6 wt%. The stiffness of pure ABS was enhanced by more than ~27% with the addition of graphene fillers. It was found from a Dynamic Mechanical Analysis(DMA) study that the storage modulus and Tan Delta values of the composites were improved compared to pure ABS. The storage modulus was increased by more than ~70% over a wide range of temperatures. The addition of graphene fillers in the ABS matrix improved the glass transition temperature (increased from 110 ̊C to 118 ̊C). Scanning Electron Microscope (SEM) images confirmed the homogeneous mixing of the ABS matrix and the graphene fillers, and better dispersion was noticed with 0.6 wt% of graphene fillers.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81646134","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 and Finite Element Method (FEM) of Dowelled Mortise and Tenon Joint for Kapur Species Kapur品种榫接试验与有限元分析

IF 1.1

Journal of Mechanical Engineering and Sciences Pub Date : 2023-01-15 DOI: 10.24191/jmeche.v20i1.21091

Amira Ruzailin Dzulkifli, R. Hassan, Sakhiah Abdul Kudus, Mohd Nizam Shakimon, Arkitek Azman Zainal, B. Anshari

{"title":"Experimental and Finite Element Method (FEM) of Dowelled Mortise and Tenon Joint for Kapur Species","authors":"Amira Ruzailin Dzulkifli, R. Hassan, Sakhiah Abdul Kudus, Mohd Nizam Shakimon, Arkitek Azman Zainal, B. Anshari","doi":"10.24191/jmeche.v20i1.21091","DOIUrl":"https://doi.org/10.24191/jmeche.v20i1.21091","url":null,"abstract":"Kapur (Dryobalanops spp.) is one of the Malaysian common species used for structural construction material. It is capable of serving as a beam and column. This study focused on the experimental mortise and tenon connection fastened with wood; glass fibre reinforced polymer (GFRP), and steel dowel. The finite element method (FEM) was used to model the behaviour of mortise and tenon joint for wood dowel subjected to pull-out loads using ABAQUS software. The experimental results were used to validate a three dimensional finite element model of mortise and tenon joint. The full structural scale ofmortise and tenon was fastened with a 21 mm diameter dowel. The investigation was carried out by applying tensile loads to the top of the tenon. This study adopted a linear elastic orthotropic material to represent the Kapur wood behaviour using the FEM. In this study, the results reveal the load carrying capacity of the mortise and tenon in a sequence of highest to the lowest is when the joint dowelled with GFRP, steel and wood. The stiffness value obtained from the FEM for wood dowel is found higher than the experimental value. Thus, the findings from finite element method (FEM) and the experimental results both had slightly dissimilar load–displacement curve shape. However, this study contributes to a better knowledge of mortise and tenon performance when secured with a wood dowel.","PeriodicalId":16166,"journal":{"name":"Journal of Mechanical Engineering and Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74374125","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