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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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STUDY OF UTILIZING PINEAPPLE LEAF EXTRACT FOR THE GREEN SYNTHESIS OF FE3O4 AND ITS IMPREGNATION ON OIL PALM (EFB) Parmita, Ade Yusariarta Putra; Dewanto, Hizkia Alpha; Tajalla, Gusti Umindya Nur; Akbar , Aulia Arif; Tajalla, Nur
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1982

Abstract

The formation process of Fe3O4/EFB fiber was carried out by synthesizing FeCl3.6H2O and pineapple leaf extract using the green synthesis method. Pineapple leaf extract contains hydroxyl, carbonyl, and amine functional groups that can act as reductants and capping agents for the synthesized metal salts. Then, the in-situ impregnation was carried out to attach magnetite to the EFB fibers. The EFB fibers were then soaked in a mixture of precursor solution and pineapple leaf extract with a variation of liquor-to-good ratios of 1:40, 1:60, and 1:80 to determine the optimal ratio in forming Fe3O4/EFB fiber. In XRD testing, the three variations of samples have peak characteristics of magnetite (Fe3O4). SEM-EDX results also showed the Fe content from three samples tested. In the UV-Vis examination, the 1:80 sample has the highest percent degradation with 68.09%, and the lowest percent degradation belongs to untreated EFB with 12.44%. Visual tests showed that the 1:40, 1:60, and 1:80 variations could degrade methylene blue after 12 hours with addition of H2O2. H2O2 increases the reactivity of Fe3O4 by providing hydroxyl radicals that can attack pollutants and mineralize methylene blue into CO2 and H2O.
DESIGN AND ANALYSIS OF AN AXIAL FLUX PERMANENT MAGNET GENERATORS WIND TURBINE FOR AUTOMATIC STACKING CRANES Maharani, Aisyah Aira Putri; Wahid, Muhamad Rizalul; Gianti, Mahmudah Salwa; Mulya, Tri Seda; Rahayuningtyas , Ari
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1984

Abstract

Automatic Stacking Cranes are indispensable tools in modern ports that can transfer containers between the landside and the waterside. These cranes are powered by electricity and consume significant amounts of energy to meet annual production demands. This substantial electricity consumption often strains the port's power grid during voltage and current fluctuations, which can destabilize the ASC's power supply. Wind turbines offer a promising alternative energy source to address these problems. This study delves into the analysis of the optimal Axial Flux Generator structure for wind turbines and calculates the associated energy losses to determine the feasibility of a wind turbine system capable of supporting the ASC's power demands. The findings reveal that employing an AFG-based wind turbine can generate the required 88,497 Watts of power for the ASC, with an average rotational speed of 1,655 rpm. This represents an annual electricity cost saving for the port of approximately 39,701,029 Rupiah.
EXPERIMENTAL INVESTIGATION ON THE MECHANICAL BEHAVIOR OF VACUUM INFUSION CFRE COMPOSITE WITH VARYING ORIENTED CARBON FIBER AND ITS APPLICATION ON ACTUAL COMPONENTS Mujiyono, Mujiyono; Utomo, Yoga Wahyu; Nurhadiyanto, Didik; Wibowo, Heri; Arifin, Achmad
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2010

Abstract

Carbon fiber-reinforced epoxy (CFRE) has better performance properties and is commonly used in the aviation industry. The placement of carbon fiber will affect the mechanical properties of the resulting composite material. The specific application to actual components has yet to be discovered regarding the mechanical capabilities of the CFRE utilization. Therefore, it is essential to investigate further the mechanical behavior of CFRE composites with varying oriented carbon fibers, especially those produced using the vacuum infusion method with a volume fraction of 40%. This study presents an experimental investigation of the CFRE composite with varying oriented carbon fibers in unidirectional, bidirectional, and forged. The result shows composite materials' mechanical characteristics, particularly in the properties of Young's modulus, Poisson ratio, and shear modulus. The unidirectional fiber composites are only suitable for tensile loads in line with the fiber, while bidirectional fiber composites should be cautiously undertaken, as tensile loads applied to the Z-axis may lead to adverse effects; conversely, shear forces can be safely applied to all three axes. The forged fiber direction results in each loading direction having separate capabilities, which are challenging to anticipate. The application of CFRE on an actual component should entail the integration of diverse fiber orientations within a single composite layer, particularly in highlighting manufacturing folding arm components and their adaptability. The test results demonstrate that the maximum load that can be tolerated by the folding arm before failure fulfills the requisite strength criteria, thus allowing for a safety factor of 7.8, which confirms the safety of the CFRE with combined fiber orientation in producing folding arm components.
STRUCTURAL ANALYSIS OF SEMI-SUBMARINE MONOHULL SHIP FOR TOURISM APPLICATIONS BY USING FINITE ELEMENT METHOD Hutagalung, Christian Imanuel; Bahatmaka, Aldias; Aryadi, Widya; Putrananda , Musdika Bagas Satria; Puteri, Berliana Ayarent
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2020

Abstract

The research assesses the structural integrity of a semi-submersible monohull glass-bottom vessel designed for tourism, featuring a hull length of 9 meters. Finite Element Analysis (FEA) was employed to simulate five loading scenarios: full load, 75% capacity, 50% capacity, 25% capacity, and no load. The ship's structural basis was designated as the boundary condition. The peak equivalent stress under full load was 297.58 MPa, with validated values at 293.93 MPa. Additional scenarios demonstrated comparable concordance between FEA simulations and validations, with stress values spanning from 296.85 to 297.4 MPa and validation results ranging from 293.4 to 293.79 MPa. All calculated safety factors surpassed 2.25, guaranteeing adherence to SOLAS Chapter II-1 rules. The results validate that the ship's hull design complies with structural integrity norms under operational loads, instilling confidence in its performance for tourism purposes.
KARAKTERISASI KEKERASAN DAN KEKUATAN TARIK BAJA TAHAN KARAT SS304 DENGAN VARIASI ELEKTRODA LAS BUSUR LISTRIK Wisnujati, Andika; Mudjijana, Mudjijana; Sutoyo, Sutoyo
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2029

Abstract

This study examines the hardness and tensile strength characterization of SS304 stainless steel welded using different electrode variations in the Shielded Metal Arc Welding (SMAW) process. The research focuses on three types of electrodes: NSN 308, NSN 309L, and NSN 312, to evaluate their influence on the mechanical properties of the weld metal. Hardness testing was conducted using the Vickers method with a 200-gf load, while tensile strength testing was performed to assess ultimate tensile strength (σu), yield strength (σy), and elongation (ε). The results indicate that the selection of electrodes significantly affects the hardness and tensile properties of the welded joints. NSN 312 exhibited the highest hardness values, particularly in the weld metal and filler areas, suggesting the formation of hard phases such as martensite or chromium-rich ferrite, making it suitable for wear-resistant applications. NSN 309L demonstrated moderate hardness, indicating a more balanced microstructure that provides good toughness and ductility. NSN 308 showed the lowest hardness values, which can be beneficial for applications requiring greater deformability. In the tensile test, NSN 309L achieved the highest ultimate tensile strength 47.77 Kg/mm² and elongation 45%, suggesting an optimal balance of strength and ductility. NSN 312 exhibited the highest yield strength 46 Kg/mm², indicating better resistance to plastic deformation. Meanwhile, NSN 308 had lower tensile properties compared to the other electrodes.  Overall, electrode selection should align with specific application requirements. NSN 312 is recommended for wear-resistant applications, NSN 309L for structures requiring both strength and ductility, and NSN 308 for applications with lower mechanical stress.
OPTIMALISASI MATERIAL DAN PROFILE REINFORCEMENT BEAM GUNA MENINGKATKAN ENERGI SERAP BENTURAN BERBASIS SIMULASI FEM Sukoco, Leonardo Paksi; Tohom, Frans; Pranoto, Ethys
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2106

Abstract

Bumpers are critical structures in passenger vehicles, designed to absorb low-speed impact energy. This study examines the effect of profile combinations (C-Hat and Double-Hat Section) and materials (Steel Bare/E.G.-H.F.80Y 100T, CFRP T700S, Aluminium 2024-T86) on MPV bumper reinforcement beam performance under UN ECE R.42 standards. Finite Element Method (FEM) simulations using ANSYS Explicit Dynamic with longitudinal impact tests (4 km/h) and side tests (2.5 km/h) were conducted to evaluate deformation, stress, and energy absorption. Results revealed that C-Hat Section with Aluminium 2024-T86 delivered optimal performance: von Mises stress 194.40 MPa, deformation 1.2057 mm, and energy absorption 160.31 J at 4 mm thickness. The Weighted Sum Model (WSM) analysis confirmed this combination as the best choice (score 1.773). The proposed design meets safety criteria while maintaining weight efficiency for MPV applications.
STUDI COMPUTATIONAL FLUID DYNAMICS (CFD) UNTUK MENDIAGNOSA KEGAGALAN POMPA INJEKSI AIR Machfud, Adam Aliyya; Cahyapala, Reka Adiyasa; Nurrahman, Ardhi Febrian
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2131

Abstract

Multistage centrifugal pumps are the critical equipment in the water injection system in oil and gas processing facilities but often fail due to abrasive and corrosive fluids. This research utilized the Computational Fluid Dynamics (CFD) approach to analyze the effect of sand particle size, produced water characteristics, and cavitation on the performance of three-stages API 610 BB3 water injection pumps. CFD simulations were performed by varying the sand particle size (10 μm, 100 μm, 100 μm) and produced water characteristics from three locations. The standard k-ε turbulence model and the Eulerian granular flow approach were utilized to model the multiphase flow. The results showed a decrease in pump efficiency of up to 10.39% dan head of up to 19.08% in 1000 μm particles. Analysis of the corrosion rate based on water characteristics showed the highest value of 0.198 mm/year at the location with the highest chloride content and conductivity. Cavitation zones were identified around the leading edge of the impeller at each stage. This study provides an in-depth understanding of the failure mechanisms of the water injection pumps. It can form the basis for developing effective mitigation strategies, such as design improvement, material selection and overhaul program.
ANALISIS VARIASI INFILL PATTERN TERHADAP KEKUATAN TARIK MATERIAL KOMPOSIT SANDWICH BERLAPIS SERAT KARBON Pramudia, Mirza; Mubarok, Khamdi; Murodah, Nailatul
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2134

Abstract

Fused Deposition Modeling (FDM) technology plays a significant role in fabricating the core of sandwich composite structures due to its capability to manufacture complex geometries with various infill patterns, enabling the optimization of lightweight and high-strength structures. This study aims to investigate the influence of infill pattern variations on the tensile properties of sandwich composites composed of a PLA core and carbon fiber skins using the hand lay-up method. The infill patterns employed include cubic, gyroid, grid, and honeycomb, each with an infill density of 20%. Specimens were fabricated and assembled according to ASTM D3039 standards, followed by tensile testing to evaluate ultimate tensile strength, elastic modulus, and fracture behavior. The results indicate that the honeycomb pattern achieved the highest tensile strength of 49.85 MPa and stiffness of 1045 MPa, followed by grid (47.44 MPa; 1033 MPa), gyroid (44.75 MPa; 946 MPa), and cubic (43.46 MPa; 945 MPa), establishing honeycomb as the most optimal infill pattern for enhancing mechanical performance.
PERANCANGAN SISTEM MONITORING EVACUATED TUBE SOLAR DRYER STUDI KASUS PROSES PENGERINGAN RUMPUT LAUT Prasetyo, Teguh; Irawan, Ibnu
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2142

Abstract

This research applies the simples moving average (SMA) method with period of 5 and 10 to filter monitoring data from solar drying system using an evacuated tube collector. Data filtering was used to eliminate measurement noise. Data was collected at five-minutes intervals. These SMA periods were also suitable for measuring humidity both in the environment and inside the drying cabinet. However, for temperature measurements inside the drying cabinet, only the 5-period SMA method could be used, as applying a 10-period SMA resulted in deviations exceeding the specified accuracy limits. In contrast, the monitoring of seaweed mass data did not required the use of SMA method, since its application led to significant measurement deviation from the actual values.
SELECTION OF AN EFFECTIVE AND EFFICIENT DUAL-FUEL PROPULSION SYSTEM FOR LNG ISO TANK LCT SHIPS Palebangan, Hendra; Muhajirin, Muhajirin; Gutami , Nanda Itohasi; Kadir , Abdul
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i3.1536

Abstract

Flexible dual-fuel technology is becoming increasingly important in the marine market, where alternative fuels are receiving more attention due to increasing concerns over exhaust pollutant emissions generated by internal combustion engines, fluctuating fuel costs, crude oil depletion, and classification issuing specific rules or guidelines for propulsion systems applied to LNG carriers. Various solutions have been proposed, including the use of alternative fuels. LNG, as a fuel, has been proven and is a viable solution to replace fuel oil. Through this propulsion system technology, it can be more flexible and efficient in accommodating various shipping routes and operations. The study used Rhinoceros, Maxsurf Modeller, and Numeca Fine Marine to integrate the track plan. Calculations of speed and break BHP, and validation of speed-power predictions with HydroComp PropExpert for propeller-engine matching confirmed the selection of dual-fuel engines. Based on the gearbox configuration and LNG load capacity, a dual-fuel ME propulsion system is selected. For large loads, use high pressure, and for small loads, use low pressure with the advantages of better energy efficiency, lower initial cost, slim dimensions, and Tier III NOx standards.

Page 95 of 97 | Total Record : 965

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