Mekanika: Majalah Ilmiah Mekanika最新文献_第3页

Nanofiber Semiconductor Experiment with Distance Variation Electrospinning Method to Improve DSSC Performance 距离变化静电纺丝法提高纳米纤维半导体DSSC性能的实验

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2022-04-14 DOI: 10.20961/mekanika.v21i1.51479

M. Fadli

引用次数: 0

Frictional Characterization Of Grey Cast Iron Train Brake Block Using A Reduced Scale Dynamometer 灰口铸铁列车制动块的减尺测功仪摩擦特性研究

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2022-04-14 DOI: 10.20961/mekanika.v21i1.48246

Bernardus Prasetya Utama

{"title":"Frictional Characterization Of Grey Cast Iron Train Brake Block Using A Reduced Scale Dynamometer","authors":"Bernardus Prasetya Utama","doi":"10.20961/mekanika.v21i1.48246","DOIUrl":"https://doi.org/10.20961/mekanika.v21i1.48246","url":null,"abstract":"The brake block is an important component that serves to slow down and stop the train. The safety of this transportation is very dependent on the reliability of this component. One of the important features of the brake block material is the coefficient of friction. The coefficient of friction of the brake block material must meet and match the requirements. The coefficient of friction of a material is measured using a friction test. Previous studies have shown that the friction coefficient of a material is influenced by braking conditions, namely contact pressure and friction speed. Many friction testing methods have been developed to study the characteristics of friction materials. In contrast to previous studies, in this study, the frictional characteristics of gray cast iron brake blocks were evaluated using a reduced scale dynamometer. The friction test is carried out by pressing the brake block specimen to the surface of the rotating wheel. The specimen size of the brake block and carriage wheels is reduced to 1/4 of the original size. The friction test is carried out at a contact pressure of 0.15, 0.20, 0.25, and 0.30 (MPa) and the friction speeds of 3, 6, 9, and 12 (m/s). The results of this study indicate that the coefficient of friction of the gray cast iron brake block decreases with increasing friction speed and contact pressure.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"174 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120882988","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 Effect of Fumigation and Alkalization on Dimensional Changes of Cantula Fiber Reinforced Unsaturated Polyester Composites Under Immersion 熏蒸和碱化对浸渍条件下canula纤维增强不饱和聚酯复合材料尺寸变化的影响

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2022-04-14 DOI: 10.20961/mekanika.v21i1.49463

M. Wibowo

引用次数: 0

Analysis Nozzle Temperature Effect In 3D Printer Fused Deposition Modelling (FDM) On Mechanical Properties and Characteristics Of Polylactic Acid (PLA) 3D打印机熔融沉积建模(FDM)中喷嘴温度对聚乳酸(PLA)力学性能和特性的影响分析

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2022-04-14 DOI: 10.20961/mekanika.v21i1.59221

Muhamad Alfa Rizky, Agris Setiawan, Untung Sukamto

{"title":"Analysis Nozzle Temperature Effect In 3D Printer Fused Deposition Modelling (FDM) On Mechanical Properties and Characteristics Of Polylactic Acid (PLA)","authors":"Muhamad Alfa Rizky, Agris Setiawan, Untung Sukamto","doi":"10.20961/mekanika.v21i1.59221","DOIUrl":"https://doi.org/10.20961/mekanika.v21i1.59221","url":null,"abstract":"The development of the metallurgical industry in the material sector has made significant progress. FDM 3D Printer is a revolutionary technology in Additive Manufacturing (AM). Polylactic Acid (PLA) is a biodegradable and compostable polymer formed from the condensation of lactic acid. This study uses a Nozzle Temperature variation of 210⁰C, 220⁰C, and 230⁰C where shrinkage measurements will be carried out on the test object then Tensile testing, Flexural test, and macrostructural analysis will be carried out to determine the effect of Nozzle Temperature on the test. Based on the results of the study, it was found that the shrinkage produced by 3D Print specimens for Tensile Tests and Flexural Tests at Nozzle Temperature 230⁰C was very high, namely 2.83% and 4.33%, respectively. Nozzle Temperature at 230⁰C produces a fairly high σUTS and σFS of 39.60±2.60 MPa and 49.02±0.76 MPa, respectively. In macrostructural analysis, the Nozzle Temperature porosity at 230⁰C produces the smallest porosity of 0.04 mm2 or 1.46%. In this case, the increase in Nozzle Temperature resulted in a large enough shrinkage as evidenced by the small porosity formed. Therefore, variations in Nozzle Temperature on PLA 3D Printer Specimen greatly affect the mechanical properties of the material.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127448616","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

Lunch Box Innovation Product Design In The Millennial Era 千禧时代的餐盒创新产品设计

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2021-09-30 DOI: 10.20961/mekanika.v20i2.52100

Bayu Pranoto, H. Firmansyah, H. Wicaksono, M. Fakhruddin, Rilis Eka Perkasa

引用次数: 0

Design, Production Cost, and Air Flow Distribution of Biomass Pellet Furnace 生物质颗粒炉的设计、生产成本和气流分布

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2021-09-30 DOI: 10.20961/mekanika.v20i2.49232

H. Sutanto, S. Suyitno, W. E. Juwana, Tito Gusti Nurrohim

引用次数: 0

Design And Control System of Automatic Control System of Coal Flow on Belt Conveyor Installation 带式输送机煤流自动控制系统的设计与控制

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2021-09-30 DOI: 10.20961/mekanika.v20i2.51986

Bayu Pranoto, C. Gunawan, H. Firmansyah, H. Wicaksono, Andhika Angger Nugraha, M. Trifiananto

{"title":"Design And Control System of Automatic Control System of Coal Flow on Belt Conveyor Installation","authors":"Bayu Pranoto, C. Gunawan, H. Firmansyah, H. Wicaksono, Andhika Angger Nugraha, M. Trifiananto","doi":"10.20961/mekanika.v20i2.51986","DOIUrl":"https://doi.org/10.20961/mekanika.v20i2.51986","url":null,"abstract":"In a power plant unit whose main fuel is coal, there is generally use a belt conveyor installation. This conveyor belt serves to supply coal from the crusher unit to the combustion chamber of the power generation unit. In this study, we discuss a case where the installation of a belt conveyor which was initially only one line was then made a new branch that supplies coal to other power generating units. Equitable capacity distribution and continuity of coal distribution are the main focus of this study. Therefore, a design of automatic control system of coal flow divider on belt conveyor installation was designed. The working principle of this coal flow splitting system is to control the movement of the straight blade plough that directs the flow of coal to each unit at the certain time and continuously. Straight blade plough in the form of steel metal plate with a thickness of about 10 millimeters in which one end is connected to the end of the pneumatic cylinder. Automatic control system of coal flow divider in belt conveyor installation designed using CX-Programmer and CX-Designer applications. CX-Programmer serves to create automatic control logic concepts. While the CX-designer functions to create a Human Machine Interface (HMI), making it easier for operators to control the course of the coal supply process. The results of this study are in the form of control logic lines that can be applied to Programmable Logic Control (PLC) device and Human Machine Interface (HMI) equipment.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129370183","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

CFD (Computational Fluid Dynamics) Modeling on Narasena Bengawan UV Team Quickster UAV Wings with Addition of Vortex Generator to Aerodynamic Performance Narasena Bengawan UV Team Quickster无人机机翼的CFD(计算流体动力学)建模与气动性能

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2021-09-30 DOI: 10.20961/mekanika.v20i2.50736

Mohammad Fahmi Luthfi, D. Danardono, E. Prasetya, Y. Kurniawan

{"title":"CFD (Computational Fluid Dynamics) Modeling on Narasena Bengawan UV Team Quickster UAV Wings with Addition of Vortex Generator to Aerodynamic Performance","authors":"Mohammad Fahmi Luthfi, D. Danardono, E. Prasetya, Y. Kurniawan","doi":"10.20961/mekanika.v20i2.50736","DOIUrl":"https://doi.org/10.20961/mekanika.v20i2.50736","url":null,"abstract":"This research is based on obtaining the best possible aerodynamic performance for the Quickster Narasena Bengawan UV Team UAV aircraft wing design. One of the factors that greatly affects the flying performance of a UAV is the wing. The wing on the Quickster Narasena UAV aircraft uses an MH33 airfoil, because MH33 is specifically for high-speed UAV aircraft. This research will discuss the comparison of the performance of a wing without a vortex generator with a wing with a vortex generator. Variations in the positioning of the vortex generator on the wing of the Quickster Narasena UAV will also be discussed in this study. The method used in this research is the CFD (Computational Fluid Dynamics) method. The simulation process will use the ANSYS Fluent 19.0 application with the K-Omega SST method with the Reynolds-Averaged-Navier-Stokes (RANS) equation as the basis. The purpose of this study is to obtain the results of the coefficient of drag, lift, and the contour of the turbulence that will occur. The simulation results that have been done are the geometry of the wing with the addition of a vortex generator can reduce the drag coefficient and can increase the lift coefficient.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115761723","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

Design Evaluations of Aerosol Suction Machine for Dental Treatment Practices in COVID-19 Era 新型冠状病毒肺炎(COVID-19)时代口腔治疗中气溶胶吸痰机的设计评价

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2021-09-30 DOI: 10.20961/mekanika.v20i2.54711

F. Imaduddin, Seraf Steva Oryzanandi, Budi Santoso, Raymundus Lullus Lambang Govinda Hidajat

引用次数: 0

Procurement and Operation Technical For Meniran (Phyllanthus Niruri) Extraction Equipment Meniran (Phyllanthus Niruri)萃取设备采购及操作技术

Mekanika: Majalah Ilmiah Mekanika Pub Date : 2021-03-31 DOI: 10.20961/MEKANIKA.V20I1.45487

B. Santoso, F. Imaduddin, H. Sukanto, J. Triyono, R. L. Lambang, P. J. Widodo, Dwi Heru Siswantoro

{"title":"Procurement and Operation Technical For Meniran (Phyllanthus Niruri) Extraction Equipment","authors":"B. Santoso, F. Imaduddin, H. Sukanto, J. Triyono, R. L. Lambang, P. J. Widodo, Dwi Heru Siswantoro","doi":"10.20961/MEKANIKA.V20I1.45487","DOIUrl":"https://doi.org/10.20961/MEKANIKA.V20I1.45487","url":null,"abstract":"At this time the government prohibits the use of antibiotics in animal feed as a growth promoter (AGP) or antibiotic, so an effective and safe immunomodulator and herbal growth stimulant product are needed through Meniran extract products (Phyllantus niruri) and chemicals in the market are not yet optimal as immunomodulators and growth stimulants. CV. Maxipro Agrosatwa which is engaged in veterinary medicine, wholesale trade of agricultural products, and other live animals will produce feed using Meniran extract products. Extraction equipment that is needed is a Rotary vacuum evaporator. This equipment is needed to separate the solvent from the solute without high heating which will damage the solute content. The vacuum condition in the flask is to make the separation more efficient as well as accelerate the separation of the solvent from a solution by reducing the boiling point. The rotation of the flask is to increase evaporation. The complexity of this equipment is what makes CV. Maxipro Agrosatwa cannot handle it alone and requires technical assistance from the Department of Mechanical Engineering (JTM) FT UNS. Technical assistance provided by JTM FT UNS is in the form of procurement, delivery, installation, operation, and maintenance of the rotary vacuum evaporator.","PeriodicalId":356258,"journal":{"name":"Mekanika: Majalah Ilmiah Mekanika","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124398462","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