cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Eswanto
Contact Email
irajtma@irapublishing.com
Phone
+62895321333935
Journal Mail Official
irajtma@irapublishing.com
Editorial Address
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.
Location
Kab. deli serdang,
Sumatera utara
INDONESIA
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
 16   17   18   19   20 
Analisis Kekuatan Tarik Polimer Komposit Polyethylene Terephthalate Berpengisi Karbon Aktif Pada Aplikasi Fuel Cell Iswandi Iswandi; Djoko Setyanto
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.v4i3.319

Abstract

Bipolar plates made from polymer–activated carbon composites offer a lightweight, economical alternative but require a balance between mechanical strength and the amount of carbon filler. This is because a filler fraction that is too high can cause agglomeration and void formation, ultimately reducing the tensile strength and overall performance of the plate. This study aims to evaluate the tensile strength of PET (Polyethene Terephthalate) composites with varying levels of activated carbon. The compositions tested were 90/10, 80/20, and 70/30 (wt%). Specimens were fabricated using a hot press (compression moulding). Tensile testing was conducted in accordance with ASTM D638. The tensile strength value was calculated from the maximum load to the cross-sectional area of ​​the specimen. The test results showed that the composite with 10% activated carbon produced 2.84 MPa. The addition of activated carbon up to 30% decreased the tensile strength to 1.05 MPa. This trend indicates that increasing the activated carbon composition decreases the tensile strength of PET composites for bipolar plate applications.
Pengaruh Head dan Jumlah Nozzle terhadap Kinerja Turbin Pelton Skala Laboratorium Supriatno Supriatno; Djoko Setyanto
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.v4i3.320

Abstract

This experimental study examines the influence of hydraulic head and nozzle number on the performance of a laboratory-scale Pelton turbine. A closed-loop test rig was developed, enabling operation with one, two, and four nozzles. The turbine, consisting of 12 buckets, was mechanically coupled to an electrical generator through a belt–pulley transmission. Experimental results reveal that increasing the number of nozzles enhances turbine efficiency, with recorded values of 2.8%, 15.8%, and 17.7% for single-, double-, and four-nozzle configurations, respectively. Despite this improvement, the turbine failed to operate at its optimal efficiency, primarily due to discrepancies between the available head and the turbine design parameters, as well as energy losses and suboptimal jet impingement.
Pengaruh Variasi Temperatur Artificial Aging terhadap Sifat Mekanik Sambungan Las Busur Tungsten Gas (GTAW) Pipa Aluminium 6063 Misbahul Mu’min; Viktor Naubnome; Siswadi Siswadi; Rizki Fauzi
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 Nabella Sofa Nur Afiqoh; Yuki Trisnoaji; Nindia Nova Novena; Muh Farhan Atha
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 Revaldo Nur Hidayat
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 Aan Burhanuddin; Agus Mukhtar; Rifki Hermana; Muhammad Amirudin; Muchamad Malik; Althesa Androva; Hisyam Ma’mun; Mohammad Fadillah; Ezze Zhain Zhiqqi Prihantono; Subkhan Ma'mum
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 Iman Pradana A Assagaf; Ariyanto Ariyanto; Angger Bagus Prasetyo; Muhammad Aqdar Fitrah
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 Revvan Rifada Pradiza; Firnanda Risky Ramadhana; Muhammad Yusuf; Mochamad Asrofi; Yayang Permadi; Dwi Heru Siswantoro; Deny Tomy Andrianto; Alfi Hasan
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) Dwi Heru Siswantoro; Yayang Permadi; Revvan Rifada Pradiza; Sekar Sari; Rizka Yusvida
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) Syaiful Mansyur; Akhirul April Harahap
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.

Page 18 of 26 | Total Record : 257

 16   17   18   19   20 

Filter by Year

2022 2026


Reset
Filter By Issues
All Issue Vol 5 No 2 (2026): Agustus Vol 5 No 1 (2026): April Vol 4 No 3 (2025): Desember Vol 4 No 2 (2025): Agustus Vol 4 No 1 (2025): April Vol 3 No 3 (2024): Desember Vol 3 No 2 (2024): Agustus Vol 3 No 1 (2024): April Vol 2 No 3 (2023): Desember Vol 2 No 2 (2023): Agustus Vol 2 No 1 (2023): April Vol 1 No 3 (2022): Desember Vol 1 No 2 (2022): Agustus Vol 1 No 1 (2022): April More Issue