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Politeknik Negeri Semarang, Indonesia
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Jawa tengah
INDONESIA
Jurnal Rekayasa Mesin
Published by Politeknik Negeri Semarang
ISSN : 14116863     EISSN : 25407678     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Rekayasa Mesin(d/h MANDEGANI) diterbitkan sejak 1997, dengan frekuensi 3 kali setahun. Misi : media komunikasi bagi dosen, praktisi, dan ilmuwan tentang karya ilmiah (scientific article) hasil-hasil penelitian, survei, studi kasus dan telaah pustaka yang erat hubungannya dengan teknik mesin, meliputi topik/tema seperti perancangan mesin, instalasi, perawatan & perbaikan mesin, bahan konstruksi & komponen mesin, teknik pengerjaan logam, pembuatan komponen mesi n, pengujian bahan dan komponen mesin, teknik pengukuran & kontrol kualitas proses/produk industri manufaktur, manajemen & teknik produksi industri manufaktur, pembentukan dan pengembangan desain produk, aplikasi komputer dalam sistem kendali & operasi mesin, mesin-mesin kalor & fluida, sistem pembangkitan energi, mesin pendingin & pengkondisian udara, pembangkitan energi alternatif & terbarukan.
Arjuna Subject : -
Articles 495 Documents
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The Effect of Clay Tile Particle Addition on the Flame Retardancy and Impact Toughness of Ramie Fiber-Reinforced Polypropylene Composites Gibrail, Muhammad; Hastuti, Sri; Listyanda, R. Faiz; Saputra, Eko; Nugroho, Wahyu; Putri, Farika Tono; Indrawati, Ragil Tri; Salahudin, Xander
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7458

Abstract

Environmental concerns regarding polypropylene (PP) plastic waste have driven the demand for more sustainable alternative materials through composite development. This study aims to analyze the effect of adding Sokka roof tile particles as a filler on the flame retardancy and impact toughness of ramie fiber-reinforced composites. The composite materials utilize a polypropylene matrix, ramie fiber reinforcement, and Sokka roof tile particles as filler with concentration variations of 2%, 4%, and 6%. The results demonstrate that increasing the filler volume significantly improves the material's flame-retardant properties, with the 6% variation achieving the best thermal performance and the lowest burn rate of 214.27 mm/min. However, in terms of mechanical properties, a decline in impact toughness was observed as the filler content increased; the average energy absorption dropped from 1.075 Joules at 2% concentration to 0.735 Joules at 6%, which is consistent with the decrease in impact strength from 0.0364 J/mm² to 0.0204 J/mm². This phenomenon indicates that while inorganic particles effectively serve as a thermal barrier, excessively high concentrations increase material brittleness, thereby reducing the impact energy absorption capacity. In conclusion, a 6% concentration of Sokka roof tile particles is recommended for applications prioritizing fire safety, while considering the compromise in mechanical strength.
A Comparative Analysis of Epoxy Coating Quality on ASTM AH-36 Steel Plates Using Surface Preparation Methods Hidayat, Rahmat; Dewa, Rando Tungga; Utomo, Thaha Yassin Ramadhan; Rizky, Muhammad; Ramadhan, Mariyan Maritza; Kristiyono, Leander Berliano Farel; Rofiq, Ainur
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7507

Abstract

The shipping industry, vital to the global economy, faces significant challenges due to corrosion in marine environments, particularly affecting steel structures like AH36 grade used in ships. This study investigates the effectiveness of two surface preparation methods—Abrasive Blast Cleaning and Power Tool Cleaning—on the adhesion of epoxy coatings, which are essential for enhancing corrosion resistance. Employing ASTM standards, we assessed surface roughness and adhesion strength, revealing that Abrasive Blast Cleaning produced a superior average roughness of 106.34 µm compared to 17.67 µm from Power Tool Cleaning. The Tape X-Cut test further demonstrated that the former achieved a perfect adhesion rating of 5A, while the latter only reached 4A, indicating slight peeling. These findings underscore the critical role of surface preparation in optimizing coating performance, suggesting that adopting Abrasive Blast Cleaning can significantly extend the lifespan and operational efficiency of both commercial and military vessels. This research not only addresses the urgent need for improved protective measures in the shipping sector but also contributes to reducing economic losses attributed to corrosion, estimated at 3-4% of GDP annually.
The Influence of Asymmetric Load Distribution on V-Belt and Pulley Transmission in Belt Conveyor Systems Tauvana, Ade Irvan; Syafrizal, Syafrizal; Ramadhan, Gilang
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7515

Abstract

Belt conveyor performance is highly dependent on the uniformity of load distribution along the belt. In practical applications—particularly in industrial, retail, and airport environments spatial limitations often force systems to operate under asymmetric loading conditions. This situation introduces a technical problem because uneven load distribution can alter contact pressure, increase belt misalignment, and accelerate mechanical wear. Although numerous studies have explored belt tensioning, pulley design, and material durability, only limited research specifically addresses the influence of asymmetric loads on slip behavior, indicating a gap in understanding the dynamic response of pulley–belt transmission systems. This study aims to experimentally evaluate the effect of asymmetric load distribution on slip characteristics in a conveyor belt transmission. The experimental setup involved shifting the load to the left or right side of the belt, while pulley speed was measured using a PLC-based monitoring system integrated with an inverter controlling a three-phase induction motor. Measurements were conducted at operating frequencies of 5–8 Hz under both symmetric and asymmetric loading scenarios. Results show that under symmetric loading, slip decreased by 0.632% across the tested speed range. Under asymmetric loading, the slip reduction increased to 1%, demonstrating that lateral load shifts generate higher local contact forces and temporarily enhance local transmission efficiency. However, this condition also has the potential to cause belt instability and reduce the lifespan of mechanical components. In conclusion, asymmetric loading significantly affects slip performance, offering short-term efficiency benefits but posing long-term operational risks. These findings provide important practical insight for optimizing conveyor systems operating in environments with constrained or non-uniform load conditions.
Front Matter Jurnal Rekayasa Mesin Vol. 21 No. 1 April 2026 Jurnal Rekayasa Mesin
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7584

Abstract

Back Matter Jurnal Rekayasa Mesin Vol. 21 No. 1 April 2026 Jurnal Rekayasa Mesin
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7586

Abstract

Page 50 of 50 | Total Record : 495

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