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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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Rekayasa Mesin
Published by Universitas Brawijaya
ISSN : 23381663     EISSN : 24776041     DOI : 10.21776/ub.jrm
Core Subject : Engineering,
Mechanical Engineering
Rekayasa Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Brawijaya, Malang-East Java-Indonesia. Rekayasa Mesin is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Rekayasa Mesin accepts submission from all over the world, especially from Indonesia. Rekayasa Mesin aims to provide a forum for national and international academicians, researchers and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Rekayasa Mesin are the specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in Bahasa and English Language.
Arjuna Subject : -
Articles 965 Documents
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OPTIMIZATIONS THE TENSILE-SHEAR STRENGTH OF TIG WELDING PARAMETERS FOR MILD STEEL AT DIFFERENT MATERIAL THICKNESSES Dwicahyo, Tegar; Basit, Arul; Amar, Amar; Sukarman, Sukarman; Khoirudin, Khoirudin; Suhara, Ade
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1486

Abstract

This article presents a study on optimizing Tungsten Inert Gas (TIG) welding on mild steel (SPCC-SD/JIS G3141) with varying thicknesses of 0.6 mm and 0.8 mm. Automobile bodies commonly utilize mild steel with a material thickness ranging from 0.6 to 0.98 mm. The objective of this study was to ascertain the upper limit of tensile-shear strength that can be achieved by utilizing the specific parameters utilized in TIG welding. This study utilizes a three-level experiment and incorporates three input variables in the Taguchi experimental optimization method. The advantage of this approach lies in its ability to yield comprehensive outcomes while minimizing expenses, as it can be adapted to the resources available. An additional benefit is that this approach can be implemented in a multitude of industrial situations.The study's input variables are welding current, argon gas flow rate, and electrode diameter. Utilizing a continuous flow of argon gas of 12 LPM (liter per minute), a welding current of 55 A, and an electrode diameter of 1.6 mm, the maximum mean T-S strength of 3457.13 N was achieved. The ANOVA revealed that the flow rate, welding current, and electrode diameter had a per cent contribution of 50.07%, 26.89%, and 23.04%. The flow rate was the parameter with the most significant impact on the influential variable. The welding current and the electrode diameter do not significantly affect the response. The findings indicate that by adjusting the parameters to the optimal level determined by the Taguchi method, the S-N ratio for T-S strength increases by 9.30%, and T-S strength increases by 12.42%. The findings of this study offer a thorough comprehension of enhancing the TIG welding approach and can be further refined by incorporating additional variables.
STUDI NUMERIK KINERJA PENDINGIN COOLANT HYBRID-NANOFLUID AL2O3-TIO2 PADA RADIATOR Hidayat, Najmul; Sudarmadji, Sudarmadji
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1489

Abstract

Coolant in automotive engine cooling systems generally uses coolant with a minimum ethylene2 glycol mixture of 30 percent. Currently, the use of nanoparticles can be mixed in basic coolant between fluid and nanoparticles that have better thermal physical properties than pure coolant. The purpose of this study was to compare the results of CFD to tests on the effect of concentration, discharge and inlet temperature of Hybrid Nanofluid Al2O3 TiO2 to temperature distribution, pressure and radiator performance. The method used in this research is CFD simulation. The data taken in this study is the rate of heat transfer in the cooling fluid of pure radiator coolant and radiator coolant plus Al2O3 TiO2 hybrid nanoparticles (hybrid nanofluid radiator coolant) with a mass percentage of nanoparticle hybrid mixture of 0.25, 0.30, 0.35 percent. Variations in the amount of fluid flow with a liter/ minute discharge (LPM) of 20, 24 ,28, and using variations in the amount of radiator fluid inlet temperature (Tin), namely 70, 80, 90 Celsius which will be simulated by ANSYS FLUENT software.
ANALYSIS OF COGGING TORQUE REDUCTION FROM DESIGN COMPUTATIONAL PERMANENT MAGNET SYNCHRONOUS MOTOR WITH TAGUCHI METHOD Wahyuni, Fitri; Julian, James; Ferdyanto, Ferdyanto; Fauzi, Ade Fikri
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1492

Abstract

Permanent Magnet Synchronous Motor (PMSM) applications include electric vehicles, industrial pumps, wind turbines, aerospace technology, and many others. In this study, cogging torque is the central aspect of the discussion, which is the motor model, the thickness of the permanent magnet rotor, and the air gap in the electric motor influence. The Taguchi method uses parameter levels on the motor, which are divided into 16 types of orthogonal arrays, where the process is carried out twice in iterations. The first stage of simulation testing was to produce the primary model where number 4 (A1B4 series) was obtained as the most optimal motor model with a cogging torque of 1.56 Nm and an air gap flux density of 768 mTesla (mili tesla). Then the second test was to modify several parts of the motor with the following 16 orthogonal array types, which produced number 8 (A2B4 series) with a cogging torque of 1.08 Nm and an air gap flux density of 733 mTesla. One of the parameters apart from the cogging torque must be maintained is the air gap flux density. This variable affects the permeability of the motor so that later it will affect the amount of material used and the production costs of electric motors. The final result is a model that produces the lowest cogging torque while maintaining other parameters on the motor.
ANALISIS MODIFIKASI DESAIN REAKTOR PADA RANCANG BANGUN ALAT PIROLISIS DAN PENGUJIAN NILAI KALOR UNTUK PLASTIK PP DAN ABS Wijayanto, Rudi Purwo; Alhikam, Francois Rubian; Hendrawan, Iyus
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1493

Abstract

The increasing use of plastic results in a rise in the volume of waste each year and has an impact on the environment. Pyrolysis is a method for recycling plastic waste into fuel oil. Improvements in pyrolysis design and techniques continue to be made to obtain better performance and optimal results. In this study, we compare the rate of increase in heat and volume of oil produced from two pyrolysis device designs. The alpha version is the previous version of the pyrolysis apparatus with a flat plate roof reactor and without the addition of an insulator on the tube wall. While the beta version is a modification of the alpha version with a conical roof reactor with the addition of calk material on the tube wall. Modification of the pyrolysis apparatus was also carried out in the condensation section. The beta version of the pyrolysis device shows better performance, where the reactor temperature reaches 250 ⁰C, while the alpha version, which is the previous version, reaches a maximum temperature of 220 ⁰C in a longer time. The volume of oil produced by the beta version is 0.11 mL/gram of polypropylene plastic, whereas the alpha version produced only 0.01 mL/gram for the same material. The test results for the calorific value of polypropylene (PP) plastic waste were 43.838 MJ/kg, while for acrylonitrile butadiene styrene (ABS) it was 44.772 MJ/kg.
DESIGN AND TEST THE PERFORMANCE OF THE WATER HEATER BY UTILIZING THE EXHAUST HEAT OF THE LABORATORY SCALE AIR CONDITIONER Gunarto, Gunarto; Eko Julianto; Muhammad Iwan
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1494

Abstract

The purpose of this research is to design and test the performance of a water heater unit that works based on the exhaust heat of the ½ PK Split Air Conditioner condenser which will be used as a power source to heat water with a capacity of 60 litres based on standard hot water temperature. for bathing at 40-45 oC according to the type of use SNI 03-7605-2005 concerning procedures for planning plumbing systems. It is hoped that this research can serve as a guideline for designing a water heater derived from an exhaust heat condenser using a Helical-Coil type heat exchanger. This research uses descriptive research with a quantitative approach. Descriptive research in this study is intended to obtain an overview and information regarding the utilization of an exhaust heat condenser with the addition of a water helical coil heat exchanger and the working process of an air conditioner water heater that utilizes condenser waste heat to produce hot water that can be used for bathing needs. From the test results, the water heater can work well as evidenced by an increase in water temperature reaching 44.40 C in 70 minutes. The energy value in the form of heat that can be utilized by adding a water heater is 1.14785 kJ/second, with a water heater efficiency of 76.23%. Thus the utilization of the air conditioner condenser wastes heat energy and is quite effective for heating water. To be able to save water use for household, business, industrial and other needs that use Air conditioners as air conditioning.
ANALISIS KARAKTERISTIK ALIRAN MELALUI PENAMPANG PERSEGI PANJANG MENGGUNAKAN MODEL TURBULEN LARGE EDDY SIMULATION (LES) Barata, La Ode Ahmad; Samhuddin, Samhuddin
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1495

Abstract

Dynamic response, fatigue, and stability issues of a structure are closely related to flow behavior past a bluff body structure. Flow past the free-end rectangular prism is investigated numerically using a Large Eddy Simulation (LES) turbulence model at Re = 22000. The prism model has a constant depth (D) to width (H) ratio D/H = 0.5 for span length variation L (= 10; 7,5; 5,0 and 2,5H). Effects of the free end on the flow characteristics showed that the flow pattern, velocity vector, and fluid forces component are changed. The presence of the free end is closed related to the flow characteristics alteration in the wake, which is presented graphically in this paper. This study suggests the critical aspect ratio of the slender rectangular is 2,5<L/H<5,0 The prism with critical aspect L = 2,5H presented an unusual flow behavior among the test models. The dynamic response of the test model affects the flow pattern in the wake, which is indicated by alteration of the region and intensity of vorticity, velocity vector, hydrodynamic force components, and other local components.
ANALISIS KONSUMSI ENERGI LISTRIK PADA PEMBANGUNAN NUWSP BIYONGA KABUPATEN GORONTALO Boli, Rahmad Hidayat; Pido, Rifaldo; Arbie, Mohamad Rifal; Rauf, Wawan
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1496

Abstract

The need for electrical energy today is starting to increase along with the increase in population and rapid development, but inversely proportional to the progress or innovations in increasing renewable energy. Given that this renewable energy can be developed continuously and operational costs are relatively cheap, the electricity that relies on coal (fossil) over time will run out and cannot be renewed, the discussion concerns the supply of PLN supplies. So that in this study the focus is on the utilization of electrical energy for the NUWSP development area of Gorontalo Regency Biyonga Village and calculating the total consumption needs of the electrical energy used. After research and data analysis, the results obtained are 189 kVA or 189,000 vA, the total peak demand with load is 3 units of centrifugal pumps, 10 points of room lighting, and 12 points of lighting around the building, the results of the analysis obtained became a reference and suggested to install electrical energy with a capacity of 197 kVA or 197,000 vA with the consideration that when development occurs, the demand for electrical energy is still sufficient from what is installed.
MODEL 3D IMPLAN LUTUT FEMUR DARI REKONSTRUKSI TULANG LUTUT DENGAN METODE REVERSE ENGINEERING BERBANTUAN PEMINDAI CT-SCAN Harun, Suryadiwansa; Ismunandar, Helmi; Burhanuddin, Yanuar; Supriyadi, Satrio Darma
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1498

Abstract

As a person ages, usually after age 50, knee joint bone damage caused by osteoarthritis can occur. It is to cause pain in the knee joint so that its function moves abnormally. The knee joint bone damage could be replaced with a prosthesis (Total Knee Replacement, TKR) to restore the knee joint's normal movement function. However, orthopaedic doctors sometimes have difficulty choosing standard implant designs available for patients' knees when performing TKR surgery, especially for Asian patients, including Indonesians. It is due to the geometry of the standard implant being different from the patient's knee anatomical shape. As a result, postoperative pain reactions can occur. Therefore, this study is to customize the TKR femoral implant's design according to the knee bone's geometry, especially in Indonesian patients. Reverse Engineering (RE) technology assisted by the CT-Scan and the boundary surface technique was applied for reconstructing the patient's knee bone into a femoral implant. The application of RE is initially, the patient's knee bone sample was scanned with Computer Tomography (CT) Scan. Then, the femur implant model was designed on the surface of the patient's knee bone using the boundary surface method. The 3D model of the TKR femoral implant was successfully designed to match the geometry of the patient's femur bone. It will be a reference for designing other TKR implants, namely the tibia component.
CARBON SIZE AND TEMPERATURE EFFECTS TO JIS S45C CARBURIZED STEEL Ekaputra, I Made Wicaksana; Wibisono, Yustinus Akas; Haryadi, Gunawan Dwi
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1499

Abstract

Wear on a metal can be naturally found in components that operate in a friction environment, such as in a transmission system. However, it can be a substantial problem when the wear rate is not within the permitted limit. Surface hardening is a popular way to improve surface wear resistance for metals with various parameters that can be controlled during the process. In this study, pack carburizing was conducted for plain carbon steel JIS S45C. The carburizing process is conducted on the steel by varying the carbon size and temperature during the heating process. The carbon size consisted of mesh sizes of 5 and 15. The heating process was conducted for 2 hours at 800oC and 900oC. The carbon media and catalyst used in this study were coconut charcoal and calcium carbonate (CaCO3). In addition, the hardness Vickers test was conducted to evaluate the surface hardness. It was found that the hardness of Vickers increased with an increase in heating temperature and mesh size of carbon.
ANALISIS PENERAPAN COATING PADA BAJA ASTM A36 DENGAN VARIASI CAT TERHADAP LAJU KOROSI, KEKUATAN ADHESI DAN KETAHANAN IMPACT COATING Budiarto, Untung; Manik, Parlindungan; Kusuma, Ghiyats Abiyyu
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1500

Abstract

Corrosion is the most common damage experienced by steel structures due to the interaction between a metal and a corrosive environment. One way to prevent corrosion of steel is coating. A good coating must have a low corrosion rate, high adhesion, and material resistance to impact. This study aimed to compare the corrosion rate, adhesion strength, and impact coating values of the different types of paint between epoxy, alkyd, and polyurethane on A36 steel. The type of steel used in this study is ASTM A36 steel. In this study, the type of coating paint used varied. The types of coatings used are epoxy, alkyd, and polyurethane. Aluminum oxide with a mesh size of 24 is used as an abrasive material. Testing the corrosion rate using the electrochemical method, the test used to determine the adhesive power value using the pull off test method, and to determine the coating resistance value using the impact test method. This type of polyurethane coating has the most optimal value between epoxy and alkyd with a corrosion rate value of 9.09×10-5mmpy, an adhesion value of 15.06 MPa, and an impact coating resistance of 4.70 Joules. Based on the results obtained in this study, the different types of coatings affect the value of corrosion rate, adhesion, and impact.

Page 79 of 97 | Total Record : 965

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