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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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Analisis Pengaruh Kandungan Cobalt terhadap Densitas dan Kekerasan WC-Co Muhammad Sobron Yamin Lubis; Gerard Theodorus; 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.v5i2.447

Abstract

This study investigates the effect of cobalt content and sintering temperature on the density and hardness of tungsten carbide cobalt materials produced using powder metallurgy. This research aims to analyze how binder content variation and sintering temperature affect the material's physical and mechanical properties. This study used an experimental approach with cobalt contents of 4%, 7%, and 10% and sintering temperatures of 1200°C, 1300°C, and 1400°C. The fabrication process included powder mixing, 24-hour ball milling, cold compaction, and sintering in an inert atmosphere. We measured density using Archimedes principle and hardness using the Vickers method. The results show that the maximum density was obtained at 10% cobalt content and a sintering temperature of 1300°C, while increasing the temperature to 1400°C decreased density due to grain growth and pore coarsening. Hardness increases with sintering temperature but has not reached the optimum value because of porosity and microstructure distribution. The results show that the combination of binder content and sintering temperature strongly determines the final properties of the material, with optimum conditions achieved at specific parameters that balance densification and microstructural stability.
Perbandingan Filter Udara Kertas, Busa, Hybrid, Stainless Terhadap Torsi, Daya, dan Emisi Honda Vario 150 Abdul Aziz Aljabbar; Rendra Ananta Prima Hardiyanta; Bambang Sudarsono
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.v5i2.448

Abstract

This study compares the engine performance and exhaust emissions of the Honda Vario 150 using four air filters: paper (OEM), foam, hybrid, and stainless steel. The testing used a quantitative experimental approach with a chassis dynamometer and an exhaust gas analyzer. The results showed that the stainless steel filter produced the highest peak power but significantly reduced engine torque due to a disrupted scavenging effect. Furthermore, the stainless steel filter generated the highest levels of emission pollutants (CO and HC) as it triggered an overly lean air-fuel ratio at high RPMs. Conversely, the paper filter (OEM) proved to be the most superior in maintaining maximum torque. In conclusion, the paper filter (OEM) is the best choice for daily commuting as it provides an optimal balance between torque, combustion efficiency, and clean emissions. A stainless steel filter is effective only for maximum-speed use and requires injection-system recalibration.
Peningkatan Sifat Mekanik Komposit Aluminium yang Diperkuat dengan Material Berbasis Grafena: Tinjauan Metode dan Aplikasi Fabrikasi Angga Alfredo Purba; Hizkia Ginting; Ida Farida; Anang Setiawan; Rando Tungga Dewa
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.v5i2.452

Abstract

Graphene-reinforced aluminum matrix composites (AMCs) have strong potential as lightweight materials with enhanced mechanical performance. This systematic review examined fabrication methods, optimal compositions, and mechanical improvements in AMCs reinforced with graphene nanoplatelets (GNP), graphene nanosheets (GNS), graphene oxide (GO), and reduced graphene oxide (rGO). The review covered 25 indexed international journal articles published between 2012 and 2024 from Scopus, Google Scholar, and Web of Science, with article selection following the PRISMA framework. The findings show that planetary ball milling, powder metallurgy, sintering, friction-stir-based processing, wet coating, and High Pressure Torsion (HPT) vary in effectiveness in achieving graphene dispersion and interfacial bonding. Hardness increased by up to 43%, tensile strength by 317%, and yield strength by 25% with rGO contents below 1 wt.%. HPT increased hardness from 64 to 122 HV at 0.25 wt.%, while RFSSW improved shear strength by 31% and fracture toughness by 20%. Key research gaps include limited hybrid fabrication studies and the lack of standardized industrial-scale testing parameters.
Analisis Kinerja Pengering Putar Bertenaga Surya untuk Pengeringan Jamur Tiram Menggunakan Dua Kolektor yang Ditutup dengan Plastik UV Melvin Emil Simanjuntak; Farhan Habib; Paini Sri Widyawati; Prisca Caesa Moneteringtyas; Agnes Br. Manurung
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.v5i2.454

Abstract

Oyster mushrooms have a high moisture content, making them highly susceptible to postharvest deterioration. Solar energy-based drying offers an alternative way to extend shelf life while reducing energy use and environmental impact. This study evaluated the performance of a solar-powered rotary dryer equipped with two UV-plastic-covered collectors for drying oyster mushrooms. The experiment ran over two days, for a total drying time of 16 hours. The observed parameters included collector temperature, solar radiation intensity, moisture content, drying rate, collector efficiency, and dryer efficiency. The results showed that the average collector temperature reached 42.7°C, while the overall average solar radiation intensity was 351.6 W/m². The average radiation intensities received by the right and left collectors were 392.2 and 311.1 W/m², respectively. Drum 1 achieved the lowest final moisture content (5.00%), while Drum 3 reached 5.20%. Collector and dryer efficiencies were 74.92% and 12.55%, respectively. The system shows potential as an effective, environmentally friendly technology for drying oyster mushrooms.
Analisis Umur Pahat Karbida pada Pembubutan Baja AISI 1018 dengan Variasi Kecepatan Potong dan Gerak Makan Muhammad Farrell Mangkusubroto; Muhammad Sobron Yamin Lubis; Rosehan Rosehan
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.v5i2.455

Abstract

Turning is one of the most widely used machining processes in manufacturing. This study analyzes the effects of cutting speed and feed rate on carbide tool life during the turning of AISI 1018 steel using an experimental method. The experiments were conducted under dry turning conditions with cutting speeds of 44.6, 71.8, 113.2, and 178.6 m/min and feed rates of 0.14 and 0.16 mm/rev. Tool wear was evaluated based on flank wear (VB) until the wear criterion of VB = 0.30 mm, following ISO 3685. The results showed that increasing cutting speed and feed rate accelerated tool wear, resulting in shorter tool life. The maximum tool life was 27 min 52 s at a cutting speed of 44.6 m/min, while the minimum tool life was 7 min 3 s at 178.6 m/min (obtained by linear interpolation at VB = 0.30 mm). A cutting speed of 113.2 m/min and a feed rate of 0.16 mm/rev provided the best balance between machining productivity and tool life.
Pengaruh Variasi Rasio Gear Pada Motor DC 350 Watt Dan 400 Watt Terhadap Konsumsi Energi dan Jarak Tempuh Prototipe Kendaraan Listrik Fathurrahman Julda; Rendra Ananta Prima Hardiyanta; Alfian Ma’arif
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.v5i2.462

Abstract

This study compared the energy efficiency of 350 W and 400 W DC motors on the Niskala electric vehicle prototype under different gear ratios. Experimental testing was conducted using three gear combinations: 12T–17T, 12T–22T, and 12T–24T. The prototype was operated under each configuration, and energy consumption was measured with a Wh meter to determine efficiency as travel distance per unit of energy. The results showed that the 350 W DC motor combined with the 12T–17T gear configuration produced the lowest energy efficiency, at 248.3 km/kWh. This result indicates that the configuration did not provide optimal motor performance under the test conditions. In contrast, the 400 W DC motor with the 12T–24T gear combination achieved the highest energy efficiency, reaching 280.3 km/kWh. These findings indicate that higher motor power, combined with an appropriate gear ratio, can help maintain more optimal operating conditions. Therefore, the 400 W DC motor with the 12T–24T gear combination was the most optimal configuration for the Niskala electric vehicle prototype.
Laminasi Vakum dan Pengikatan Antar Lapisan pada Pelat Balistik Hibrida: Tinjauan Singkat Judika Landung Butarbutar; Eka Irianto Bhiftime; Haniel Christo Hong Sitorus; Angga Alfredo Purba; Alif Safril Hudya; Anang Setiawan
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.v5i2.464

Abstract

Multilayer hybrid ballistic plates have been developed to provide lightweight protection with high penetration resistance. In these structures, interlayer bonding is critical because poor adhesion can promote delamination and reduce ballistic performance. This article presents a mini review of studies published between 2015 and 2026, focusing on adhesive properties, surface preparation, vacuum lamination, void formation, and ballistic performance. The reviewed studies indicate that adhesive bonding and vacuum-based lamination techniques can improve consolidation and promote more uniform adhesive distribution in hybrid armor systems. Appropriate vacuum pressure can also reduce void formation, thereby improving interlayer bonding quality compared with conventional methods. In addition to processing conditions, adhesive elastic modulus and thickness, as well as surface roughness, affect delamination resistance. This review maps the relationship between vacuum lamination parameters, interlayer bonding quality, and ballistic performance, providing a basis for developing more reliable hybrid ballistic plates. The synthesis also highlights the importance of controlling bonding conditions to achieve consistent structural performance.
Pengaruh Fraksi Berat Serbuk Cangkang Kerang Perna viridis terhadap Tensile strength dan Kekuatan Impak Komposit Bermatriks Epoxy dengan Metode Degassing Fi Amalin Rosyada; Muhammad Budi Haryono; Muhammad Faesal Febriandyono
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.v5i2.467

Abstract

Perna viridis shell powder is an abundant biomaterial waste in coastal areas of Indonesia and has potential for use as a reinforcement in composite materials. This study investigated the effect of varying the weight fraction of Perna viridis shell powder on the physical and mechanical properties of epoxy resin composites fabricated through a degassing process. We used an experimental approach with filler contents of 0%, 25%, 35%, and 45%, with shell powder passing through mesh 100 (approximately 149 µm). Material characterization included macrographic observation, porosity measurement, Charpy impact testing, and tensile testing. The results showed that filler content variations affected the composite structure and mechanical properties. Increasing the filler content improved tensile strength, Young’s modulus, and impact resistance up to a certain composition, while elongation decreased. The highest impact resistance was obtained at 25% filler (0.071 J/mm²), whereas the optimum tensile strength of 32.56 N/mm² was achieved at 35% filler. The highest Young’s modulus, 14.32 N/mm², was obtained at 45% filler. These results demonstrate the potential of Perna viridis shell powder as a reinforcement for epoxy-based composites.
Pengaruh Penggunaan Sonicator Terhadap Karakteristik Mekanis Komposit Epoxy Berpenguat Serbuk Cangkang Kerang Anadara Granosa Bayu Prima Viadhi; Muhammad Budi Haryono; Muhammad Faesal Febriandyono
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.v5i2.468

Abstract

Anadara granosa shell waste is an abundant biomaterial in Indonesian coastal areas and has potential as a reinforcement for environmentally friendly composite materials. The manufacturing process influences composite quality, particularly filler distribution and porosity formation during mixing. This study aimed to investigate the effects of sonication methods using full wave, semi wave, and degassing modes on the physical and mechanical characteristics of epoxy composites reinforced with Anadara granosa shell powder. The composites were prepared using epoxy resin and hardener at a 2:1 ratio, then shell powder was added at 35% of the total mixture volume. The mixture was homogenized using a magnetic stirrer and subsequently subjected to the respective sonication treatments before molding and curing for 24 hours at room temperature. Material characterization included porosity measurement based on Archimedes’ principle, tensile testing according to ASTM D638, and Charpy impact testing based on ISO 179. The test results were used to evaluate the effects of the sonication methods on porosity, tensile strength, and impact toughness and to identify the most effective method for improving composite quality.
Analisis Komparatif Sifat Tarik dan Impak Komposit Resin Epoxy yang Diperkuat dengan Serbuk Cangkang Kerang Simping (Amusium pleuronectes), Kerang Dara (Anadara Granosa), dan Kerang Hijau (Perna Viridis) Afrizal Eka Nanda; Muhammad Budi Haryono; Muhammad Faesal Febriandyono
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.v5i2.469

Abstract

Shellfish waste is an abundant biomaterial in Indonesia's coastal areas, but its use as a value-added material remains limited. Its high calcium carbonate (CaCO₃) content makes it a potential particulate filler for epoxy resin-based composites. This study aims to analyze the effect of different shell powder types, namely Asian moon scallop (Amusium pleuronectes), blood cockle (Anadara granosa), and green mussel (Perna viridis), on the mechanical properties of epoxy resin composites. The composites were fabricated by mold casting using 100-mesh particles. Mechanical testing included tensile tests per ASTM D638 and impact tests per ISO 179. The results showed that shell powder type affected the mechanical properties of the composites. The composite containing green mussel (Perna viridis) shell powder exhibited the highest tensile and impact strengths compared with the other types. These results show that shellfish waste has potential as an environmentally friendly natural filler to improve composite mechanical properties, support sustainable material development, and increase the added value of fishery waste.

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