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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 195 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.

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