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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 195 Documents
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Pengaruh Variasi Temperatur Artificial Aging terhadap Sifat Mekanik Sambungan Las Busur Tungsten Gas (GTAW) Pipa Aluminium 6063 Mu’min, Misbahul; Naubnome, Viktor; Siswadi, Siswadi; Fauzi, Rizki
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.v4i3.322

Abstract

Aluminum alloy series 6000, especially AA 6063, is widely used in pipe construction because of its light weight, corrosion resistance, and weldability with Gas Tungsten Arc Welding (GTAW) process. This study aims to determine the effects of variations in the heat-treatment temperature during artificial aging on the tensile strength and hardness of 6063 aluminum pipe weld joints. The artificial aging temperature variations used were 150°C, 175°C, and 200°C with a holding time of 30 minutes. The results showed that aging at 200°C produced the highest ultimate tensile strength (UTS) of 181 MPa and the highest hardness in the base metal (BM) area of 70.5 HV.
Simulasi dan Pembuatan Prototipe Generator Listrik Bertenaga Langkah Mekanis untuk Aplikasi Energi Terbarukan Nur Afiqoh, Nabella Sofa; Trisnoaji, Yuki; Novena, Nindia Nova; Atha, Muh Farhan
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.v4i3.329

Abstract

The design and fabrication of a Mechanical Footstep Power Generator was developed as an innovative approach to harness kinetic energy from footsteps and convert it into electrical energy. Using a fabrication analysis and Design for Assembly (DFA) method, the prototype was designed to be both efficient and easy to assemble. The system consists of nine primary components, including the top plate, bottom plate, gear plate, gear, pinion, spring, dynamo (DC), long bolt M12, and nut. Fabricated parts were processed through tapping, drilling, milling, grinding, shaping, and chamfering, while other components were commercially purchased. DFA analysis indicated a medium level of assembly complexity, with potential errors mitigated by applying error proofing and systematic assembly guidelines. Experimental testing demonstrated a consistent increase in electrical output corresponding to the number of steps applied, starting from 2.96 V and 0.0074 W at the first step, reaching 5.71 V and 0.051961 W at the twentieth step. These results confirm that the prototype can reliably convert mechanical energy into electrical energy, though its application is currently limited to low-power usage. Nevertheless, the system presents significant potential for future development aimed at improving efficiency, capacity, and broader applicability in renewable energy solutions.
Analisis Kondisi Spherical Roller Bearing terhadap Efisiensi Kinerja Mill Fan Nur Hidayat, Revaldo
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.v4i3.330

Abstract

This study analyzes the condition of the spherical roller bearings of the Mill Fan at a cement plant in the Finishing Mill Unit. Spherical roller bearings are important components that affect the smoothness and efficiency of Mill Fan operation. The objective of this study is to analyze the relationship between the condition of spherical roller bearings and Mill Fan efficiency, calculate their theoretical life, and compare it with their actual field service life. The method employed involves collecting operational data from the central control room, such as pressure, shaft rotation, flow capacity, and motor power, and then calculating the efficiency and estimating the service life of the spherical roller bearings. The results show that the theoretical service life of the spherical roller bearings is 16.3 years, while the actual service life is only 8.5 years, or 51.5% of the design life. The Mill Fan efficiency before spherical roller bearing replacement was 68.92%; it decreased after replacement and then increased to 76.95% in the subsequent period. The conclusion of this study is that the difference between the theoretical and actual service life of spherical roller bearings is affected by lubrication quality, operating load, operating temperature, and cement dust contamination. Periodic condition monitoring and preventive maintenance are necessary to improve reliability and extend the service life of spherical roller bearings. This research provides a basis for evaluating more effective maintenance strategies and operational efficiency of Mill Fans in the cement industry.
Desain Logika Fuzzy untuk Penilaian Kualitas Air Sumur Berdasarkan Parameter Salinitas, pH, dan Kekeruhan Burhanuddin, Aan; Mukhtar, Agus; Hermana, Rifki; Amirudin, Muhammad; Malik, Muchamad; Androva , Althesa; Ma’mun , Hisyam; Fadillah , Mohammad; Prihantono , Ezze Zhain Zhiqqi; Ma'mum, Subkhan
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.v4i3.333

Abstract

This study develops an integrated fuzzy-logic-based assessment system to evaluate well water quality using pH, salinity (via TDS conversion), and turbidity. The research aims to develop an adaptive system capable of handling uncertainties in water quality parameters in real-time monitoring across Semarang's coastal areas. The methodology incorporates sensor performance validation, fuzzy input processing, rule-based inference, and defuzzification implemented through MATLAB R2021a. Experimental results demonstrate exceptional metrological performance, with sensor linearity achieving determination coefficients (R²) of 0.9995 for pH, 0.9998 for salinity, 0.9996 for temperature, and 0.9993 for turbidity. Statistical validation confirmed measurement precision, with root-mean-square errors (RMSEs) of 0.018 pH units, 0.023 ppt salinity, 0.14°C temperature, and 0.027 NTU turbidity. Field implementation across 6 sub-districts revealed that 83.3% of samples complied with pH quality standards, 60% met turbidity thresholds, while 33.3% of samples in Genuksari exhibited seawater intrusion indicators with salinity levels exceeding 0.5 ppt. The study conclusively demonstrates that the developed fuzzy logic system provides accurate, consistent water quality evaluation and presents a viable framework for smart water monitoring infrastructure in coastal urban environments, particularly for detecting saline intrusion and maintaining water security.
Analisis Cacat Las SMAW dengan Elektroda Berbeda Posisi 2G pada Baja ST 37 Metode FTA Assagaf, Iman Pradana A; Ariyanto, Ariyanto; Prasetyo, Angger Bagus; Fitrah, Muhammad Aqdar
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.v4i3.334

Abstract

This study aims to analyze the types and causes of welding defects that occur during Shielded Metal Arc Welding (SMAW) using different electrodes in the 2G position on ST 37 steel. The research was conducted by students of the Diploma III Industrial Agro-Manufacturing Engineering Study Program at Politeknik ATI Makassar using both qualitative and quantitative approaches. A total of 10 welded samples were visually examined and tested using the liquid penetrant method to detect surface defects. The analysis employed the Fault Tree Analysis (FTA) method with a deductive approach to identify the top events representing major defect types, trace their root causes through the fault tree structure using AND and OR logic gates, and analyze the relationships among contributing factors. The results revealed five dominant defect types—spatter, stop-start, surface undercut, root concavity, and blow hole—which accounted for 61.7% of all detected defects. These defects were primarily caused by technical factors, including unstable arc control, improper welding angles and travel speeds, and poor cleanliness of electrodes and materials. Other defects, including root undercut, cold lap, excessive penetration, pin hole, and porosity, also affected weld quality. Based on the FTA findings, corrective actions were recommended, including operator retraining, proper parameter adjustment, equipment maintenance, and enhanced supervision to improve overall weld quality.
Sifat Mekanik dan Biodegradabilitas Biokomposit Berbasis Polyvinyl Alcohol dan Pati Kentang dengan Pennisi Serbuk Kulit Lemon Pradiza, Revvan Rifada; Ramadhana, Firnanda Risky; Yusuf, Muhammad; Asrofi, Mochamad; Permadi, Yayang; Siswantoro, Dwi Heru; Andrianto, Deny Tomy; Hasan, Alfi
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.v4i3.335

Abstract

This study aims to examine the mechanical properties, surface morphology, and biodegradability of polyvinyl alcohol-potato starch biocomposites with lemon peel powder as a filler. The biocomposites were produced by solution casting with 1%, 2%, and 3% fillers of lemon peel powder. Mechanical properties were tested to determine tensile strength in accordance with ASTM D882. The addition of lemon peel powder increased tensile strength as the percentage content increased. The highest tensile strength was 4.82 MPa in polyvinyl alcohol-potato starch biocomposites containing 3% lemon peel powder. This indicates that lemon peel powder effectively improves bonding with the matrix and produces stronger interfacial bonds. However, the flexibility of the biocomposites decreased with increasing lemon peel powder content, as indicated by a decrease in elongation. Furthermore, the biodegradation of the biocomposites showed that the biocomposite with the highest lemon peel powder content (3%) exhibited the fastest degradation rate, reaching 65.22% after 15 days of testing. These results indicate that the presence of lemon peel powder improves the mechanical properties of the biocomposite without reducing its biodegradability. These findings indicate that biocomposites made from polyvinyl alcohol and potato starch with lemon peel powder are a promising sustainable plastic alternative, combining strength, flexibility, and degradability.
Pengaruh Variasi Suhu Kondensor terhadap Kinerja Rotary Vacuum Evaporator pada Ekstraksi Meniran (Phyllanthus Niruri) Siswantoro, Dwi Heru; Permadi, Yayang; Pradiza, Revvan Rifada; Sari, Sekar; Yusvida, Rizka
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.v4i3.336

Abstract

This study analyzes the effect of condenser temperature variation on the performance of a rotary vacuum evaporator (RVE) in extracting Phyllanthus niruri solution. Three condenser conditions, 23 °C, 30 °C, and without cooling, were tested, each with five replications. Observed parameters included evaporation time, mass reduction rate, energy consumption, and flavonoid content, which were analyzed statistically using Analysis of Variance (ANOVA). Results showed that the 23 °C condenser achieved the highest mass reduction rate (3.78 g/min) and the lowest energy consumption (0.14 kWh). At 30 °C and without cooling, mass reduction rates decreased to 3.02 g/min and 2.24 g/min, while energy consumption rose to 0.19 kWh and 0.20 kWh. The 23 °C condenser also produced the highest flavonoid content (11.9 mg/mL), confirming optimal thermal efficiency. This work fills the research gap on the effect of condenser temperature on energy efficiency and extract quality in RVE systems and provides a basis for developing energy-efficient evaporators for small-scale herbal industries.
Sistem Otomatisasi Pengendalian Kelembaban menggunakan Sensor DHT21 dan Modul Peredup Arus Bolak-Balik (AC Light Dimmer) Mansyur, Syaiful; Harahap, Akhirul April
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.v4i3.339

Abstract

This study analyzes an environmental control system based on an AC Light Dimmer, integrating ADC values, AC voltage, and RPM for drying applications. The results reveal a strong linear relationship between ADC values and AC voltage, with blower RPM increasing proportionally to the voltage. The system successfully reduced humidity from 60% to 26.3% and increased temperatures from 35.6°C to 50.6°C automatically via DHT21 sensors. While the ADC performed well, potential saturation at high voltages requires careful design consideration. Overall, the microcontroller-based dynamic RPM control effectively optimizes drying processes with high precision and energy efficiency. This system is highly applicable to raw-material processing industries that require stable environmental control to minimize product damage and reduce power consumption.
Rancang Bangun Teknologi Smart Mixing Ice Cream Gelato untuk Pengembangan Bisnis UMKM Kekinian Widiyanti, Widiyanti; Nurmalasari, Riana; Marji, Marji; Tuwoso, Tuwoso; Sh Abdul Nasir, Sh Mohd Firdaus
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.v4i3.340

Abstract

Gelato has become a trendy dessert, gaining popularity in the market. However, few UMKM are involved in making contemporary gelato. One reason is the high cost of equipment and the need for special techniques. The success of a gelato product is largely determined by the dough used. Given this situation, UMKM should start using technology to produce gelato dough with higher quality and consistency. The design method for creating gelato dough mixer technology that meets UMKM needs includes problem identification, field studies, design, prototyping, assembly, and analysis. This technology is expected to create an effective, efficient, and high-quality production process. This technology serves not only for stirring but also as a chopper for fruit or other gelato ingredients. This gelato dough mixer technology chops the gelato topping ingredients, which then automatically fall into the gelato mixing chamber and are churned into gelato. The mixing chamber can accommodate a single production process of 30 kg. After mixing is complete, the gelato is removed from the mixing tube through the provided channel, and the results are stored in a container so the packing process can continue.
Optimasi Persediaan untuk Ketersediaan Perkakas Kerja di Bengkel Otomotif Pratomo, Hariyo P. S.; Hernando, Ivan Christian; Rudijanto, Matthew Jeffrey; Tandio, Joseph Wicaksono
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.v4i3.342

Abstract

Automotive workshops commonly face inefficiencies in special-tool availability due to manual and non-transparent tracking systems. This study addresses this challenge by examining the impact of limited tool quantities on operational performance, particularly the low average service level (86.18% vs. the 95% target). This study is among the first to integrate a digital tool management system with quantitative inventory-optimization methods, i.e., Safety Stock and Cost-Benefit Analysis (CBA), in an automotive workshop context. Borrowing-transaction records collected over 60 days were analyzed to identify critical tools with the highest demand variability. Although most tools achieved full availability, 15 high-demand tools contributed to reduced overall service level and were therefore prioritized in the optimization process. Application of Safety Stock analysis recommended ideal inventory quantities, while CBA revealed diminishing-return thresholds, preventing unnecessary investment. Key improvements include increasing service level from 71.27% to 99.51% and enhancing cost efficiency to 89.04%. The combined digital recording system and quantitative optimization framework have proved highly effective in improving tool availability and reducing operational costs. This approach offers a scalable model for automotive workshops seeking to enhance efficiency and sustainability through data-driven tool-management strategies.

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