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Hamdan Akbar Notonegoro
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FLYWHEEL : Jurnal Teknik Mesin Untirta
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 24077852     EISSN : 25977083     DOI : https://doi.org/10.36055/fwl.v0i0.
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 10 Documents
 1 
Search results for , issue "Vol 11, No 1 (2025): April" : 10 Documents clear
Stress Analysis of Varian of Plastic Material for Fence Ornament Products Using Finite Element Method Hendra, Hendra; Ula, Shofiatul; Septiana, Reski
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.33959

Abstract

 Plastic is the most widely used material in Indonesia. The most commonly processed types of plastic are PET (Polyethylene terephthalate), HDPE (High-density polyethylene), and PP (Polypropylene). With advancements in materials technology, plastic is increasingly in demand as a material for fence decoration due to its advantages such as lightness, flexibility, weather resistance, and economy. Using composite materials makes it possible to optimize both strength, flexibility, and resistance to various environmental factors that occur, so as to produce more durable fence ornaments. This study aims to obtain the maximum stress and displacement values of fence ornament products using PP (Polypropylene), PET (Polyethylene Terephthalate), and HDPE (High Density Polyethylene) materials and different variations. And also compare the simulation results of the mechanical test of the fence ornament with the mechanical test conducted in the material laboratory. The finite element method is a numerical method for solving engineering problems of mathematics and physics. This method can be applied to problems with complex geometries, loads, and material properties, which cannot be solved analytically. Simulation results on fence ornament products with PP, PET, and HDPE plastic material composition with a thickness of 10 mm produced a stress value of 61.84 MPa, to the largest 70.26 MPa, and a displacement value of 0.038 mm, to 0.074 mm. In the experimental results obtained a stress value of 14.572 MPa, in the best simulation results obtained a stress value of 63.12 MPa, with a displacement value of 0.038 mm. This can occur due to factors that affect the results of simulation and testing. 
Tensile Strength of Packaging Materials Made of Rice Fiber with Gondorukem Coating Caturwati, Ni Ketut; Pinem, Mekro Permana; Visoka, Cri Kalki
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34128

Abstract

Packaging is one of the important needs in the food business that is difficult to avoid. Developing packaging products for food is an important thing that must be done to maintain cleanliness, health and the environment. Packaging waste that uses plastic as the basic material causes environmental pollution because it is not easily decomposed. Green packaging is one form of packaging that uses environmentally friendly materials such as rice straw. Bio-foam from straw combined with PVA, Glycerin, corn starch and distilled water is made into sheets for packaging. This sheet is tested with the addition of a coating derived from gondorukem which comes from plants. With this coating, it is expected to increase the tensile strength and hydrophobicity of the material surface. Testing was carried out with variations in the mixture of gondorukem and alcohol as the basic coating material, namely gondorukem concentrations of 20%, 40% and 60%. The tensile test results showed that a coating with a concentration of 60% gondorukem produced the highest tensile strength value. The increase in tensile strength reached 102% of the tensile strength of the sheet without gondorukem coating.
Development and Design of Portable 1 Phase Spot Welding Machine Kurniawan, Ipung; Pujono, Pujono; Pribadi, Joko Setia; Prabowo, Dian
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34064

Abstract

The design method used as an approach in designing portable spot welding machines is the VDI 2222 design method. Working drawings use ISO standards and the design application used is solidworks. From the design method used as an approach in designing portable spot welding machines, the results of image documents in the form of working drawings are obtained which will then be used in the production process. The result of maximum stress calculation result of the frame used is 0,301 N/mm2 ≤ ????izin = 166,67 N/mm2, therefore the results obtained show that the elbow profile size 40 mm x 40 mm x 2 mm is confirmed to be safe to withstand the given load. The spring calculation above τ max = 27,07 Kg/mm2 ≤ τa = 65 Kg/mm2, therefore the results obtained show that the spring with a winding diameter of 7 mm and a wire diameter of 1.2 mm is certainly safe to withstand the given load
The Effect of Mechanical and Electro-Chemical Treatment on the Corrosion Rate of Austenitic Stainless Steel Wahyudiono, Arif; Sulistiono, Dety Oktavia; Zain, Alex Taufiqurrohman
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34081

Abstract

The aim of this research is to determine the effect of grid blasting and electropolishing on the surface roughness and corrosion rate of AISI 304 stainless steel. In this research, AISI 304 will be treated using surface treatment grid blasting with various variations in blasting time which is then combined with electropolishing. The gritblasting times used in this research were 3, 5, and 7 minutes, and the type of sand used was alumina. Meanwhile, for electropolishing, H2SO4 is used.  Before the grit blasting process is carried out, the material is polished using SiC paper no. 200 and then the surface roughness was measured to be 937 ± 10 µm.  After this the electropolishing process is carried out using an H2SO4 solution. The surface roughness test results showed that the surface roughness decreased with grid blasting time.  Likewise, the data obtained from the corrosion rate is where the corrosion rate also decreases with grid blasting time.
The Effect of Temperature in Cryogenic Treatment on the Mechanical Properties and Microstructure of High-Speed Steel SKH 51 Hasanah, Indah Uswatun; Alhamidi, A Ali; Andriyansyah, Hardy; Suprapto, Suprapto
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.31173

Abstract

High-speed steel SKH 51 has excellent mechanical properties, including high hardness and wear resistance. This material is widely used for cutting tools and drills. Service life is also a crucial factor that is often improved to extend the material’s usability. To enhance the service life of SKH 51, a heat treatment modification was applied, specifically cryogenic treatment, to increase its hardness and wear resistance. The process began with austenitization, followed by quenching using N₂ gas. Subsequently, cryogenic treatment was conducted at varying temperatures of -80°C, -110°C, and -140°C, with a holding time of 30 minutes. Finally, a tempering process was done at 540°C with a holding time of 3 hours. The microstructure and mechanical properties after the applied heat treatment were studied. In the as-received condition, the microstructure consisted of pearlite, ferrite, and coarse carbides. After the heat treatment, martensite and carbides formed in significant amounts, with only a small fraction of retained austenite remaining after the cooling process. X-ray diffraction (XRD) analysis revealed carbide phase peaks such as MC, M₂C, and M₆C. The hardness value increased as the cryogenic treatment temperature decreased over the 30-minute duration. Wear resistance was measured using the Oghoshi wear test method, showing an improvement as the cryogenic treatment temperature decreased. The increase in hardness and wear resistance of SKH 51 was attributed to the greater formation of martensite and carbides, which reduced the amount of retained austenite..
AMC Brake Pad Engineering: The Role of Reinforcement, Silica Sand, and Boiler Fly Ash on Friction Coefficient and Density Syahrizal, M. Razeev; Erwansyah, Erwansyah; Sukanto, Sukanto; Budi, Abdul; Wanto, Agus
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34298

Abstract

Innovations in making non-asbestos brake linings are increasingly being developed, asbestos materials which are less friendly to the environment and health are the main factors. This research utilizes recycled aluminum as a matrix and boiler fly-ash and silica sand as reinforcement. The aim of this research process is to determine the differences in variations in hot compaction pressure and powder volume percentage on shrinkage values and friction coefficients. The method used is the powder metallurgy method which includes mechanical alloying, hot compaction pressing and sintering. Mechanical Alloying is carried out using a ball mill machine with Ball Parameter-weight of Ratio (BPR) parameters of 10:1, rotational speed of 90 rpm, holding time of 6 hours with variations in the matrix percentage of 86%, 90%, 94% and the results of the mechanical alloying  will be weighed in variations, namely 25 gr. , 35 gr, and 45 gr. ASTM B962-17 density test and ASTM G99-05 coefficient of friction or wear test. The results obtained were the highest density value of 2.055 gr/cm3 with a reinforcement percentage of 94% compaction of 5600 Psi. The lowest density value is 1.848 gr/cm3 with a reinforcement percentage of 86% compaction of 5600 Psi. The friction coefficient test value is 0.147 gr with a reinforcement percentage of 86%, the powder weight is 45 gr. The lowest value of the friction coefficient test was 0.020 gr using a reinforcement percentage of 94% and a powder weight of 35 gr.
Utilization of Flywheel Generators with Inertial Loads To Produce Optimal Power Hidayat, Royan; Willis, Galuh Renggani; Farid, Ahmad
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.28851

Abstract

The increasing need for electrical energy encourages the development of more efficient alternative energy sources. This study aims to analyze the utilization of flywheel-based electric generators with inertial loads to produce optimal output power.The research method used is an experiment, by testing a flywheel-based electric generator with variations in flywheel mass, namely 26 kg, 28 kg, and 54 kg. Testing is carried out by measuring the rotational speed of the shaft, torque, and output power produced under various operational conditions.The results of the study showed that the use of a flywheel contributed to maintaining the stability of the generator rotation speed, so that the output power produced was more consistent. From the test results, a flywheel with a mass of 26 kg produced an optimal output power of 367.6 W compared to other flywheels. The flywheel is also able to store mechanical energy and release it as needed, increasing system efficiency. The conclusion of this study is that a flywheel-based generator with an inertial load can be a potential solution in the development of more efficient and sustainable alternative power plants.
Performance Analysis 2000cc Gasoline Engine by Using Hydrogen – Pertamax Fuel Mixture Caturwati, Ni Ketut; Sudrajad, Agung; Raditya, Putu Evan
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34187

Abstract

The use of motor vehicles has led to an increased demand for fossil energy sources as the main fuel and produce air pollution. Therefore, there is a need for alternative energy which is hydrogen. This research, we analyzes the performance of a 2000cc gasoline engine with hydrogen as a mixture with Pertamax fuel, varying the engine speeds at 2000, 2500, 3000, and 3500 rpm. The variable of hydrogen flow rates at 0.6, 1.2, and 1.8 lpm. The experimental results obtained that the addition of hydrogen as a dual fuel have an impact on the increase in the alternator power output in 15% at the difference 0 lpm and 1.8 lpm of hydrogen flow rates. The thermal efficiency also increases with the addition of hydrogen reach to 10.46%. The specific fuel consumption shows decrease at 2000 rpm on 34% between 0 lpm and 1.8 lpm. The emissions of HC and CO were decrease, while CO2 increases with the addition of hydrogen.
The Effect of Artificial Aging on Al 6061/SiC Composite Produced by Thixoforming Ula, Shofiatul; Alhamidi, A. Ali; Sunardi, Sunardi; Satria, Dhimas; Yusuf, Yusvardi; Setiawan, Ipick; Verdana, Narendra Putra
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34503

Abstract

Thixoforming improves material properties better than conventional methods through the formation of non-dendritic or rounded structures. This study aimed to optimize the mechanical properties of Al 6061/SiC composites by adding Mg as a wetting agent through stir casting, thixoforming, and artificial aging processes. The holding time during the artificial aging process was varied to investigate its effect on microstructure, hardness, and impact toughness. SEM analysis revealed a more uniform distribution of SiC particles with increasing holding time, indicating the effective formation of Mg2Si precipitates. The maximum hardness of 48.5 HRB and the highest impact toughness of 0.022 J/mm² were obtained at the longest holding time of 3 hours. This indicates that the formation of homogeneous Mg2Si precipitates during the artificial aging process significantly contributed to the improvement of the composite's mechanical properties.
Performance Improvement of Coal Dust Briquettes: Application of Taguchi Design and Pareto Analysis for Optimizing Key Processing Variables Dharta, Yuli; Wahyudie, ilham Ary; Sukanto, Sukanto; Husman, Husman; Yuliyanto, Yuliyanto; Oktriadi, Yudi
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 1 (2025): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i1.34541

Abstract

The main challenge in the briquette-making process is selecting the appropriate and proportionate reinforcement or adhesive. The chosen adhesive must not only provide strong adhesion but also be compatible with other components. Briquettes are alternative fuels in solid form, made from carbon-containing materials with a high calorific value, allowing them to burn for an extended period. Coal is one of the alternative materials that can be used for briquettes. The choice of adhesive type and composition directly influences the compressive strength, thermal stability, and durability of briquettes in various environmental conditions. This study aims to investigate how process parameters affect the compressive strength of briquettes produced from coal powder reinforced with molasses, to improve the efficiency of the briquette production process. The methodology used in this study is the Taguchi method. The process parameters include four factors, each with three levels, tested with three replications: the percentage of reinforcement or adhesive at levels of 10%, 12.5%, and 15%; pressure at levels of 8 MPa, 10 MPa, and 12 MPa; temperature at levels of 70 °C, 90 °C, and 110 °C; and heating time at levels of 60 minutes, 90 minutes, and 120 minutes. To enhance the comprehensiveness of the study, several factors, including the moisture content of the briquettes, have also been examined. The results indicate that the temperature during the drying process is the most significant factor influencing the production of these briquettes.

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