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Hamdan Akbar Notonegoro
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Department of Mechanical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa Jl. Jend. Sudirman Km. 3 Cilegon,
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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 243 Documents
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INVESTIGATION OF THE MECHANICAL AND PHYSICAL PROPERTIES OF COMPOSITE COCONUT COIR FIBER AND EPOXY RESIN Muhamad Fajar Sidiq; Irfan Santosa; Mustaqim mustaqim; Iqmal Aji Pangestu
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.42297

Abstract

This study aims to investigate the fabrication process, the mechanical strength characteristics, and the effect of fiber volume fraction variations on the mechanical and physical properties of the composites. The fabrication method was hand lay-up with coconut coir fiber-to-resin ratios of 10:90, 20:80, and 30:70. The process included fiber preparation (cleaning, alkalization, and drying), mixing the resin and catalyst at a 2:1 ratio, plate molding, and curing for 24 hours. Specimens were cut per ASTM D790 for flexural testing, ASTM D256 for impact testing, and prepared for friction coefficient evaluation. The results demonstrated that the variation in fiber fractions significantly influenced the mechanical and tribological properties of the composites. The results demonstrated that the variation in fiber fractions significantly influenced the mechanical and tribological properties of the composites. The 10:90 coconut coir fiber-epoxy resin composition yielded a flexural strength of 21.33 MPa, an impact energy of 0.018 J/mm², and static and kinetic friction coefficients of 0.39 and 0.38, respectively. Meanwhile, the 20:80 composition showed a flexural strength of 39.72 MPa, an impact energy of 0.031 J/mm², and static and kinetic friction coefficients of 0.48 and 0.45, respectively. The 30:70 variation showed a flexural strength of 30.10 MPa, an impact energy of 0.031 J/mm², and static and kinetic friction coefficients of 0.57 and 0.54, respectively. Overall, the 20:80 coconut coir fiber-to-epoxy resin variation was considered the most optimal composition, as it provided the best balance among flexural strength, impact resistance, and friction coefficients.
MANUFACTURING OF A PORTABLE MECHANICAL DOLLY JACK FOR FWD REAR WHEELS Okta Pianti Rahayu; Antonius Adi Soetopo; Nuhammad Farel
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.42512

Abstract

Front-wheel-drive (FWD) vehicles are widely used because of their simple construction, fuel efficiency, and relatively low maintenance costs. However, rear tire damage on the road often makes vehicle handling difficult because conventional jacks are less practical for moving the vehicle. This study aims to manufacture a portable mechanical dolly jack with a maximum load capacity of 400 kg to lift the rear wheel of an FWD vehicle, allowing the vehicle to be moved to the nearest repair shop. The manufacturing process included literature review, design development, material procurement, machining, assembly, and testing. The materials used consisted of hollow steel sections, steel shafts, steel plates, and steel pipes. The evaluation included manufacturing time and cost estimation, direct mobility testing on a vehicle, and structural strength analysis using Finite Element Analysis (FEA). The test results showed that the device was capable of lifting loads of up to 400 kg and moving properly without damage. Therefore, the developed portable mechanical dolly jack fulfilled the intended functional requirements and can be used as a practical and easy-to-operate device for lifting and moving vehicles in emergency situations.
INVESTIGATION AND ADAPTATION OF A PRECISION AIR CONDITIONING SYSTEM FOR PRACTICAL LABORATORY LEARNING Mutaufiq Mutaufiq; Hendri Sulistyo; Ega Taqwali Berman; Kamin Sumardi; Abdul Rohman Nuryadi
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.42775

Abstract

Precision Air Conditioning (PAC) is a type of advanced cooling machine with features that enable the cooling process to be carried out more efficiently and effectively. This tool is very suitable for use as a learning tool for practical work. However, PAC cannot be directly adopted, but needs to be conditioned so that it can be used as a learning medium for practical work. This study aims to investigate and adapt the PAC cooling machine so that it can be optimized as a learning medium. The PAC investigation aims to determine the feasibility of the performance of a used PAC cooling machine for use as a practical tool. Then the PAC adaptation aims to add the necessary tools and materials so that the PAC is ready for use for practical activities The research uses the R&D (Research and Development) method to produce PAC demonstration tools with the stages of concept, design, collecting materials, assembly, and testing. The trial was conducted to determine the PAC performance parameters, including air temperature, Refrigeration Effect (RE), Compression Works (CW), and Coefficient of Performance (COP). According to the test results, that the PAC cooling machine can operate well after being adapted as a practical demonstration tool. The PAC cooling machine can produce supply air with a minimum temperature of 16.4 oC. Furthermore, the PAC performance calculation results show an RE value of 136.65 kJ/kg, a CW value of 36.26 kJ/kg, and a COP value of 3.84.

Page 25 of 25 | Total Record : 243

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