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Perum Graha Garuda Mas Blok II No. 39 Dusun V Desa Sigara-Gara Kecamatan Patumbak Kabupaten Deli Serdang Provinsi Sumatera Utara, Indonesia, Kode Pos: 20361.
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IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Published by CV. IRA PUBLISHING
ISSN : -     EISSN : 29624290     DOI : https://doi.org/10.56862/irajtma
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) fokus pada artikel ilmiah hasil penelitian dan review dalam bidang teknik mesin dan aplikasinya yang antara lain meliputi: 1. Konversi energi 2. Mekanika 3. Material 4. Manufaktur 5. Lain-lain yang relevan
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 257 Documents
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Evaluasi Kinerja Pompa Sentrifugal P.100/03 Berdasarkan Head Losses dan Deviasi terhadap Kondisi Desain Moh Solikhul Umam; Hisyam Ma’mun; Aan Burhanuddin
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.420

Abstract

Pumping systems play a pivotal role in crude oil distribution; however, performance studies are often conducted in laboratory settings that often fail to represent actual field operations. This study evaluates the performance of the P.100/03 centrifugal pump in the crude oil distribution system at PPSDM Migas Cepu by comparing actual conditions with design specifications, using head-loss analysis. The methodology employs field studies integrated with technical calculations utilizing operational data, including suction and discharge pressures, flow rates, fluid characteristics, and piping configurations. Key analyzed parameters encompass head losses, total pump head, hydraulic power, and pump efficiency. The results demonstrate a total pump head of 56.78 m. A significant finding reveals a drastic efficiency decline from 60.28% under design conditions to 23.1% in actual operation. This performance degradation is attributed to pump operation deviating from the Best Efficiency Point (BEP), substantial head losses within the piping system, and early indications of cavitation on the suction side. This research underscores that actual operational conditions significantly influence pump performance, necessitating regular evaluations and maintenance to optimize the efficiency of field pumping systems.
Analisis Pengaruh Parameter Pengelasan terhadap Heat Input pada Proses GTAW Multipass Pipa ASTM A36 Maryadi Maryadi; Muhammad Zulfikar; Arifiansah Arifiansah; Tugiman Farudin
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.423

Abstract

This research aims to evaluate heat input calculations in multipass Gas Tungsten Arc Welding (GTAW) on ASTM A36 steel pipe. The primary parameters investigated include current, voltage, and welding speed, incorporating a process efficiency factor (η = 0.7). The research methodology employs an experimental approach where heat input values are systematically calculated for each welding layer. The results indicate that increases in current and voltage are directly proportional to the rise in heat input, whereas an increase in welding speed is inversely proportional to it. Specifically, the highest heat input was observed in the root layer at 2.43 kJ/mm, followed by the filler layer (2.20 kJ/mm), capping layer (2.08 kJ/mm), and hot pass layer (2.00 kJ/mm). Metallurgically, these findings indicate that excessive heat input can trigger grain growth in the Heat Affected Zone (HAZ), while insufficient heat input can lead to lack-of-fusion defects. This study significantly contributes to understanding thermal energy distribution across multipass welding layers, providing a fundamental basis for determining optimal parameters to ensure high-quality weld joints.
Simulasi Pengaruh Variasi Beban Produk pada Tegangan, Displacement dan Factor of Safety pada Bearing Sabuk Konveyor Abdul Mu'is Sulaiman; Hisyam Ma’mun; Muhammad Budi Haryono
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.427

Abstract

Continuous production processes can lead to sudden bearing failure in conveyor belts, potentially stopping operations. This study aims to analyze stress, displacement, and the factor of safety (FOS) of a bearing using the Finite Element Analysis (FEA) method. Static simulations were conducted using SolidWorks to model the bearing under conveyor operating conditions. The applied loads were 94.49 N, 94.76 N, and 95.04 N, with a conveyor speed of 3 m/s. The results show that the maximum von Mises stress ranges from 17.36 MPa to 17.39 MPa, which is far below the yield strength of chrome steel AISI 52100 at 2033.95 MPa. The maximum displacement is very small, at 0.0004798 mm, remaining within safe limits. The average FOS is 12.7, significantly exceeding the minimum standard of 1.25 according to Mott’s theory, indicating high structural reliability despite signs of overdesign. It can be concluded that the SKF 6003 bearing is safe for use under these operating conditions.
Evaluasi Variasi Kondisi Operasi Terhadap Perpindahan Panas Kondensor Pada Proses Destilasi Daun Serai Wangi Arga Daniel Pratama Sirait; Darianto Darianto; Iswandi Iswandi; Bobby Umroh; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.299

Abstract

The condenser plays a crucial role in determining the efficiency of lemongrass (Cymbopogon citratus) essential oil distillation by facilitating heat transfer and vapor condensation. This study analyzes the effect of varying operating conditions on the heat transfer rate, Log Mean Temperature Difference (LMTD), condenser effectiveness, and citronella oil production. The evaluation involved three test variations, comparing heat transfer parameters and condenser performance. The results indicate that the heat transfer rate increased from 152,438.27 W in Variation I to 170,963.54 W in Variation II, reaching 186,544.68 W in Variation III. This increase was accompanied by a rise in the LMTD value from 25.18°C to 29.74°C, an improvement in condenser effectiveness from 81% to 89%, and an increase in the conversion of condensate vapor mass into citronella oil from 28% to 36%. These results demonstrate that the increase in heat transfer rate is directly proportional to condenser effectiveness and the success of the condensation process. Variation III represents the optimum operating condition, as it yielded the most efficient heat transfer and the best condenser performance during the citronella leaf distillation process.
Analisa Getaran dan Geometri pada Mesin Pengaduk dan Pencetak Briket Jupri Yanda Zaira; Mustaza Ma’a; Agus Wijianto; Rio Hardyanto
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.386

Abstract

This study analyses the vibration characteristics of a mixing and briquette molding machine and the effect of frame geometry conditions on its dynamic response based on experimental measurements. This research aims to evaluate the vibration level caused by structural geometric misalignment. The methods used include vibration measurements using a vibration tester at critical points of the machine frame and flatness measurements using a spirit level. Vibration amplitude is determined from the maximum displacement at each point and measurement direction. The results show that the highest amplitude occurs at point 4 in the vertical direction, reaching 0.1027 mm, while the lowest amplitude is found at point 2 in the axial direction, measuring 0.0427 mm. The dominance of vertical vibration indicates the influence of gravitational forces and frame misalignment. Vibration amplitude varies with the position of measurement points relative to dynamic load sources and structural stiffness. No resonance is observed, indicating that the vibrations are forced vibrations caused by system imbalance. Flatness deviations of 0.0073 mm (horizontal) and 0.152 mm (axial) contribute to increased vibration amplitude, confirming that frame geometry significantly affects vibration levels.
Rekayasa Material, Desain Struktural, dan Mekanisme Disipasi Energi: Tinjauan Komposit Thermoplastic Polyurethane (TPU) Cetak 3D untuk Aplikasi Peredaman Tingkat Lanjut M. Alif Safril Hudya; Anang Setiawan; Dustin Kaban; Hizkia Ginting; Angga Purba; Fikri Muzhaffar; Haniel Sitorus
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.411

Abstract

Thermoplastic Polyurethane (TPU) exhibits good elasticity, impact resistance, and viscoelastic properties, making it promising for energy dissipation applications. Fused Filament Fabrication (FFF) enables the development of complex structures, including lattice, auxetic, and Triply Periodic Minimal Surfaces (TPMS). This systematic review analyzed 50 articles published between 2020 and 2026 from Scopus/ScienceDirect, Nature, and MDPI using the PRISMA 2020 approach. The review focused on energy dissipation mechanisms, TPU composite engineering, and structural design optimization. The synthesis showed that TPMS improved energy dissipation efficiency by 30–40% compared with honeycomb structures, while auxetic structures increased impact energy absorption by up to 45%. Adding graphene, carbon nanotubes, and TPU/PLA blends increased mechanical modulus by 20–60% but could reduce the damping ratio by 5–15%. Material engineering supports manufacturing stability, whereas geometric optimization primarily determines energy dissipation performance. Key research gaps include multifunctional materials, functionally graded TPMS, and machine-learning-based optimization.
Analisis Kuantitatif Timbulan Limbah dan Potensi Ekonomi Bengkel Mobil di Soloraya Zaky Darojatun Hanif Rabani; Onery Andy Saputra; Utomo Ramelan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.436

Abstract

This study analyzes waste generation and the economic potential of waste produced by small- and medium-scale automotive repair workshops in Soloraya. This study used a quantitative and qualitative descriptive approach, drawing on 10 workshops selected through purposive sampling. Data were collected through observation, interviews, and documentation, and analyzed using descriptive statistics to determine waste generation and economic value. The Kata Kunci: timbulan limbah; bengkel mobil; ekonomi sirkular results identified five major waste types, namely used oil, used oil filters, used oil bottles, used brake pads, and scrap metal. Used oil was the dominant waste stream, accounting for 2,633 liters per month, or 48.3% of total waste generated. The estimated economic value of workshop waste reached IDR 9,502,300 per month, with used oil contributing the largest share. This study provides baseline data on waste generation and economic potential in automotive repair workshops in Soloraya. The findings indicate that waste utilization can support circular economy practices while improving sustainable waste management and resource efficiency in the automotive service sector.
Pengaruh Suhu dan Kecepatan Injeksi Terhadap Cacat Burn Mark Pada Proses Injection Moulding Ridhwan Hendrianto; Muhammad Sobron Yamin Lubis; Erwin Siahaan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.437

Abstract

Injection molding is a widely used manufacturing process in the plastics industry because of its high production efficiency and ability to produce components with high precision. However, defects such as burn marks may occur and affect product quality. Burn marks are characterized by surface discoloration caused by thermal degradation of polymer materials or trapped gases within the mold cavity. This defect reduces product quality and increases rejection rates, particularly in polypropylene products. This study aims to analyze the factors influencing burn mark defects using the Ishikawa diagram approach, which classifies causes into human, machine, method, material, and environmental factors. We conducted experimental tests by varying nozzle temperatures from 225°C to 250°C and injection speeds from 60.8 mm/s to 67.2 mm/s, with each condition repeated three times. The results indicate that higher temperatures increase the likelihood of burn mark defects. The optimal condition was obtained at 225°C with an injection speed of 67.2 mm/s, producing defect-free products. In contrast, the most severe defects occurred at 250°C with an injection speed of 60.8 mm/s. These findings highlight the importance of proper parameter control to improve product quality in injection molding processes.
Redesain Ergonomi Alat Sortasi TBS di PT. X Menggunakan Metode Rapid Entire Body Assessment (REBA) dan Nordic Body Map (NBM) untuk Mengurangi Beban Kerja Reakha Zulvatricia; Riana Puspita; Yasinta Yasinta
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.444

Abstract

Manual sorting of Fresh Fruit Bunches (FFB) using a conventional pointed tool requires prolonged bending and repetitive movements, which may increase the risk of musculoskeletal disorders. This study aimed to evaluate injury risk among five FFB sorting operators at PKS PT. X and redesign the tool to improve working posture. We assessed subjective complaints using the Nordic Body Map (NBM) and analyzed working posture using the Rapid Entire Body Assessment (REBA) method. The NBM results indicated complaints at six major body regions, particularly the back, forearms, and wrists, with symptoms predominantly categorized as painful to very painful. The initial REBA assessment produced a score of 11, indicating a very high risk requiring immediate improvement. The tool was redesigned based on the operators’ 50th-percentile anthropometric data, incorporating a 120 cm tool length, a 15° angled D-handle, and an additional footstep to improve load distribution. Simulation after redesign showed that the REBA score decreased to 3, corresponding to a low-risk level. The redesigned tool effectively improved working posture and reduced injury risk.
Analisis Kekuatan Tarik dan Tekuk Sambungan Las SMAW Baja AISI 1045 pada Rangka Go-kart Prototipe Mochamad Fahti Hawari; Muhammad Sobron Yamin Lubis; Abrar Riza
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.445

Abstract

The go-kart frame is subjected to static and dynamic loads, making welded-joint quality a critical factor in structural strength. This study aims to analyze the tensile and bending strength of SMAW welded joints on AISI 1045 steel with current variations of 70 A, 90 A, and 110 A (three specimens for each current variation) using E7018 electrodes through tensile testing (ASTM E8), bending testing (ASTM E190), and metallographic analysis on the base metal, weld metal, and Heat Affected Zone (HAZ). The results show that at 70 A, the tensile strength is 431.64 MPa and the bending strength is 677.66 MPa; at 90 A, they increase to 614.76 MPa and 1103.88 MPa, the highest values; and at 110 A, they slightly decrease to 601.68 MPa and 1084.21 MPa due to excessive heat input. Therefore, 90 A is the optimal parameter as it provides the best combination of strength and ductility.

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