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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 221 Documents
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Analisis Kinerja Struktur Crane Monorel 8 Ton Menggunakan Analisis Rangka dan Evaluasi Sambungan Baut Handoko, Ari; Aldori, Yopan Rahmad; Mislan, Mislan; Farsa, Fadhli; Setyanto, Nova Arief; Masrajuddin, Masrajuddin
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.359

Abstract

This study analyzes the structural performance of an 8-ton monorail crane using frame analysis simulation in Autodesk Inventor Professional 2012. The structure is made of ASTM A36 carbon steel, and the applied load is calculated with a safety factor of 1.67, yielding a load of 131,061.6 N. The evaluated parameters include bending moment, shear force, normal stress, and displacement. The results show a maximum bending moment of 1,538,000 N·mm, a maximum shear force of 97,063 N, and a maximum stress of 151.6 MPa, which is below the allowable stress of 250 MPa. The maximum displacement of 29.95 mm is also lower than the allowable limit of 30.5 mm according to SNI 03-1729-2002. In addition, bolt-connection evaluation confirms safe performance under loading. Therefore, the monorail crane structure is considered safe and suitable for lifting 8 tons.
Pengaruh Variasi Suhu Penekanan Terhadap Kualitas dan Sifat Mekanik Serat Daun Nanas Berbasis Resin Epoksi untuk Aplikasi Komposit Suhartono, Roni; Setiana, Yadi Hikmah; Komarudin, Didin
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.361

Abstract

This study aims to evaluate the effect of varying pressing times at a constant temperature, using the hot-press method and the same resin mixture, on the material's quality and mechanical properties. Tensile testing was conducted in accordance with ASTM D3039 using specimens measuring 250 × 20 × 2 mm to ensure accurate mechanical measurements on thin laminates. The process began with selecting healthy pineapple leaves, followed by extrusion. A chemical treatment was then applied by immersing the fibers in a 5% NaOH solution for 2 hours. The fibers were subsequently mixed with resin and pressed for 20, 30, and 40 minutes at 100 °C. The results showed that the first sample, pressed for 40 minutes, achieved a tensile strength of 55.25 MPa. The second sample, pressed for 30 minutes, reached 50.38 MPa, while the third sample, also pressed for 30 minutes, achieved 47.8 MPa. The 40-minute pressing time can be considered the recommended working point, as evidenced by the highest tensile strength of 55.25 MPa.
Analisis Saringan Terhadap Hasil Penepungan Rumput Laut dengan Mesin Disc Mill dan Penggerak Motor Bensin dalam Waktu Tertentu Mubarok, M. Zakki Hilmi; Androva, Althesa; Burhanudin, Aan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.362

Abstract

This study analyzes the effect of sieve size and operating parameters on seaweed grinding performance using a Disc Mill machine powered by a gasoline engine. The experiments were conducted using a constant initial material mass of 125 g with variations in sieve size (0.3 mm, 0.5 mm, and 0.8 mm) and rotational speed ranging from 2000 to 2400 RPM. The results indicate that sieve size significantly influences the amount and quality of flour produced. The highest flour yield of 79 g was obtained using a 0.8 mm sieve at 2200 RPM, while the lowest yield of 44 g was produced using a 0.5 mm sieve at 2400 RPM. Smaller sieve sizes improved particle fineness but reduced flour yield due to longer particle retention within the grinding chamber. The Disc Mill machine with a gasoline engine drive demonstrated good operational flexibility, particularly in areas without electricity access. Overall, the performance of the Disc Mill machine strongly depends on the appropriate selection of sieve size and operating parameters. These findings highlight the potential of Disc Mill technology to improve efficiency and product quality in seaweed flour processing.
Pengaruh Variasi Arus Dan Jenis Elektroda RB-26 Terhadap Kekuatan Tarik Sambungan Las SMAW Pada Baja AISI 1060 Husaini, Muhammad Alwi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.363

Abstract

This research was conducted to analyse the effect of welding current variation and electrode type on the tensile strength of SMAW welds on AISI 1060 high-carbon steel. Quantitative experimental methods were applied in the laboratories of the Medan State Polytechnic and the Al-Azhar University in Medan. AISI 1060 steel with a thickness of 8 mm and a carbon content of 0.60-0.70% was welded using RB-26 electrodes with current variations of 80A, 90A, and 100A. Tensile testing was conducted in accordance with ASTM E8/E8M to measure ultimate tensile strength (UTS), yield strength, and specimen elongation. The research results show that the best mechanical performance was obtained at a welding current of 100A with a UTS of 338.58 N/mm², a yield strength of 117.77 N/mm², and an elongation of 5.42%. Conversely, the lowest UTS of 123.4 N/mm² and elongation of 4.47% were produced at a current of 80A due to insufficient heat input. Increased tensile strength was found to be proportional to increasing welding current up to an optimal limit, but excessive current can cause detrimental microstructural changes. It is concluded that selecting appropriate welding current parameters is crucial for obtaining high-quality weld joints on AISI 1060 steel, with a current of 100A recommended as optimal.
Karakterisasi Metalurgi Camshaft Non-OEM Menggunakan Uji Komposisi Kimia dan Kekerasan Surface Hardening Setijo Budi, Sigit; Hendrawan, Andre Budhi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.366

Abstract

This study aims to evaluate the metallurgical characteristics of Non-OEM camshafts through chemical composition analysis and surface hardness testing, and to compare them with a reference camshaft manufactured from VCN150 steel. All samples were tested in the as-received condition to represent actual manufacturing quality in the market. Chemical composition was analyzed using Optical Emission Spectroscopy (OES), while surface hardness distribution was measured using the Rockwell C method in accordance with ASTM E18. The results show that the Non-OEM A camshaft exhibits the highest surface hardness (≈60–61 HRC) with a steep decrease toward the core, whereas the Non-OEM B camshaft reaches approximately 56–57 HRC with a more uniform hardness profile. The reference camshaft demonstrates a surface hardness of about 60 HRC with a gradual decrease toward the core. Variations in carbon and alloying elements contribute to differences in hardening response. These findings indicate variable material quality among Non-OEM camshafts compared with industrial-grade materials.
Analisis Pengaruh Penggunaan LPG sebagai Bahan Bakar Alternatif terhadap Performansi dan Efisiensi Mesin Bensin Dinata, Irvan Hendrawan Surya; Jufrizal, Jufrizal; Darianto, Darianto; Hermanto, Tino; Umroh, Bobby; Nurdiana, Nurdiana
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.260

Abstract

This study investigates the effect of using Liquefied Petroleum Gas (LPG) as an alternative fuel to Pertalite on the performance, energy efficiency, and operating cost of a 6.5 HP gasoline engine-driven water pump. Experiments were conducted at three engine operating conditions: minimum, average, and maximum engine speeds. The evaluated parameters included engine speed, water discharge, hydraulic power, shaft power, brake specific fuel consumption (BSFC), thermal efficiency, overall system efficiency, and fuel operating costs. The results indicate that the pump's hydraulic performance, as measured by water discharge and hydraulic power, is not significantly affected by the type of fuel used. However, engines that use Pertalite tend to have slightly better thermal and system efficiencies than LPG engines. From an economic perspective, LPG offers a substantial advantage, with lower operating and energy costs per unit of power. Therefore, despite Pertalite's slightly superior technical efficiency, LPG is a more economical alternative fuel for long-duration water pump applications.
Penelitian Perubahan Kinerja Mesin dan Karakteristik Emisi pada Remapping ECU pada Sistem Mesin 150cc Empat Tak dengan Satu Poros Nocken Atas Wicaksono, Dodo; Muhammad, Alief; Fathuddin Noor, Muhammad; Dewi, Indah Noor Dwi Kusuma; Helsinky, Mava Nurhaliza; Prasetiyo, Dani Hari Tunggal; Achmadin, Wahyu Nur 
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.374

Abstract

This study evaluates the effects of ECU remapping, ignition system adjustments, and air-fuel ratio (AFR) modifications on engine performance and emission characteristics. Tests were conducted over engine speeds ranging from 4000 to 9000 RPM with different configurations: ECU, ignition system, and AFR adjustments. Results indicate that AFR remapping combined with fuel system tuning enhances torque and power at mid-range RPM, reaching a maximum torque of 12.98 N·m and power of 12.25 HP. ECU and ignition modifications increased CO and HC emissions, whereas AFR optimization through the fuel system reduced CO and improved Lambda toward stoichiometric balance. These findings highlight the importance of balancing performance improvement with emission control.
Pengaruh Parameter Sintering terhadap Stabilitas Fasa dan Struktur Mikro pada Komposit Titanium-Hidroksiapatit dengan Teknologi Serbuk: Review Harwijayanti, Widyanita; Hidayat, Tubagus Adytia Syarief
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.v5i1.380

Abstract

The increasing demand for orthopedic implants has driven the development of metals as biomedical materials. However, metals exhibit limited bioactivity, necessitating modifications to enhance their biological integration. One widely developed method is the fabrication of Titanium-Hydroxyapatite (Ti-HA) composites via powder metallurgy, utilizing hydroxyapatite for its similarity to human bone composition. This review analyzes 16 articles from Scopus and Google Scholar (2005-2023) based on material types, powder metallurgy parameters, and the physicochemical characterization of Ti-HA composites. The powder metallurgy process involves mixing, compaction, and sintering, during which the final properties are significantly influenced by the atmosphere, temperature, and holding time. A critical challenge is thermal stability, as hydroxyapatite decomposes above 800°C and titanium undergoes crystalline structural transformation beyond 882.5°C. During sintering, interparticle bonding and diffusion processes occur, triggering new phase formations and alterations in surface morphology. This process results in a final Ti-HA composite composition consisting of Titanium (Ti), Calcium (Ca), Phosphorus (P), and Oxygen (O). This study underscores the importance of precise control of temperature parameters to maintain material integrity during fabrication.
Penerapan Teknologi Oven Pengering Cat Tipe Tertutup Dengan Isolator Aluminium Foil Pada UMKM Bengkel Otomotif Parenden, Daniel; Mangera, Paulus; Cipto, Cipto
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.v5i1.384

Abstract

Paint drying in small automotive repair workshops is commonly performed at ambient conditions, resulting in long waiting times and inconsistent film formation, especially for waterborne coatings. This limits daily throughput and repeatability. This study designs and evaluates a simple low-temperature (30-40°C) closed drying oven for paint specimens with a 0.60 m3 chamber (1.2 x 1.0 x 0.5 m), a 200 W electric heater, and on-off thermostat control. An internal aluminum-foil radiant barrier is applied to reduce wall heat losses. Thermal performance is assessed using analytical heat-loss estimation and warm-up tests to a 40°C setpoint. The predicted wall heat loss decreases from 648 W (without foil) to about 97 W (with foil), yielding an effective heating power of roughly 103 W. Experiments show the oven reaches 40°C within 4-6 min and maintains the setpoint with stable cycling. Thermal efficiency improves from 31% to 85%, indicating a low-cost, energy-saving solution for practical specimen drying in SMEs.
Pengaruh Variasi Kemiringan Front Wall Dan Perioda Gelombang Air Laut Terhadap Daya Udara Yang Dihasilkan Dan Efisiensi Pada Model Oscillating Water Column (Owc) Pembangkit Tenaga Gelombang Peldiansah Ismael , Alif Rahman; Supardi, Nurul Iman; Puspawan, Angky; Witanto, Yovan; Alqap, ASF
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.v5i1.391

Abstract

Ocean wave energy is a renewable resource with significant potential for development in Indonesia, given its vast coastal areas. One technology for converting wave energy into usable power is the Oscillating Water Column (OWC) system. This system utilizes the vertical motion of seawater inside a chamber to generate airflow, which then drives a turbine to produce energy. This study aims to analyze the effect of oscillating column tilt angle and wave period variations on the energy conversion efficiency of an OWC model, and to determine the optimal tilt angle for maximum efficiency in converting wave power into air power. The research was conducted experimentally using a laboratory-scale OWC model measuring 1500 mm in length, 300 mm in width, and 500 mm in height. The oscillating column tilt angles tested were 0°, 35°, 40°, and 45°. Artificial waves were generated using a motor drive at 30 rpm, 40 rpm, and 50 rpm, producing wave periods of 2.1 seconds, 1.6 seconds, and 1.2 seconds, respectively. Measured parameters included air velocity, motor speed, wave period, wavelength, and wave height. Calculations determined wave power, air power, and system efficiency. Results show tilt angle and wave period significantly affect OWC efficiency, with the highest efficiency reaching 41.00% at 40° tilt and 1.6-second waves.

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