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INDONESIA
ARMATUR : Artikel Teknik Mesin dan Manufaktur
Published by Universitas Muhammadiyah Metro
ISSN : 2722080X     EISSN : 27220796     DOI : https://doi.org/10.24127
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
ARMATUR : Artikel Teknik Mesin dan Manufaktur [ISSN (online) : 2722-0796, ISSN (cetak) : 2722-080X], merupakan jurnal terbitan berkala yang diterbitkan oleh Program Studi Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Metro. ARMATUR terbit 2 kali dalam setahun bulan Maret dan September, memuat hasil-hasil penelitian dalam bidang Teknik Mesin dan Manufaktur. Dalam sekali penerbitan, ARMATUR memuat 5-10 artikel dengan 5-10 halaman per artikel. Proses penerimaan naskah jurnal sepenuhnya dilakukan melalui Online Journal Sistem (OJS).
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 131 Documents
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Eksplorasi Komposit Sandwich Berbasis Polyurethane sebagai Alternatif Material Struktural dalam Industri Kelautan Widityo, R. Puranggo Ganjar Widityo; Sumarji; Dani Hari Tunggal Prasetiyo; Subhannaan Alif Rezeki
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.9461

Abstract

The use of lightweight structural materials, high mechanical strength, and resistance to corrosive marine conditions is very important for the marine industry. The properties of lightweight, strong, and corrosion-resistant materials can be fulfilled by one of the materials, namely polyurethane sandwich composites. The purpose of this study is to study how sandwich composites function mechanically with various types of reinforcing layers (skins), including Chop Strand Mat (CSM), Woven Roving (WR), and a mixture (CSM + WR) and two types of cores, namely polyurethane sheet and polyurethane foam. This study uses a hand lay-up technique to make sandwich composite specimens. Then, the specimens were tested with flexural and impact tests to measure the mechanical properties of the material. The flexural test results showed that the specimen with WR skin and polyurethane sheet core had the highest flexural strength of 94.78 MPa. On the other hand, the impact test, the WR composition also showed the best value, with an impact value of up to 0.34 J/mm² in the polyurethane foam core configuration. The results showed that the sandwich composite consisting of a WR skin and a polyurethane foam core had the best mechanical performance in terms of flexural strength and impact toughness. Therefore, this composite can be used as an alternative structural material in marine industry applications.
ANALISA VARIASI SUHU PADA PROSES DESTILASI BIOETANOL DARI BIJI JAGUNG Bayu, Rangga; A’rasy Fahruddin; Rachmat Firdaus; Edi Widodo
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10158

Abstract

The increasing demand for renewable energy has encouraged research into the development of bioethanol from abundant local raw materials, one of which is corn kernels which are rich in starch. This study was conducted to determine the effect of variations in distillation temperature on the volume and purity of bioethanol produced from fermented corn kernels. The research process begins with material preparation, namely sowing corn kernels until they germinate, grinding, then fermenting with yeast (Saccharomyces cerevisiae) for 7 days. The fermentation results were then distilled for 30 minutes using a simple distillation apparatus with three temperature variations, namely 70°C, 80°C, and 90°C. The volume of bioethanol was measured using a measuring cup, while the ethanol content was tested using an alcohol meter. The results showed that at a temperature of 70°C a volume of 130 ml of bioethanol was obtained with a purity of 67%, at a temperature of 80°C a volume of 168 ml was obtained with the highest purity of 83%, while at a temperature of 90°C the volume increased to 191 ml but the purity decreased to 73%. The data demonstrates a trade-off between ethanol volume and purity, where higher heating temperatures increase volume, but purity does not always increase. This study concludes that the optimal distillation temperature is 80°C, as lower energy can produce bioethanol with a combination of a relatively large volume and the highest purity.
UJI EKSPERIMENTAL TIPE TWIN WATERJET THRUSTER MENGGUNAKAN MATERIAL STAINLESS STEEL 304 Hasdiansah, Hasdiansah; Ferzy Ersandy; Boy Rollastin; Muhammad Subhan; Faiz Maulana Akbar
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10172

Abstract

Maritime is a vital sector that highly depends on ship propulsion systems to support mobility and maritime security. One of the developing propulsion technologies is the waterjet thruster, which provides advantages in maneuverability, efficiency, and resistance to cavitation for high-speed vessels. This study aims to experimentally investigate the performance of a twin waterjet thruster made of stainless steel 304. The prototype was designed using SolidWorks software with a configuration of 12-blade inlet, 3-blade impeller, and 12-blade outlet, and tested using a 22 HP combustion engine at 2,300 rpm in a water test tank. The results showed thrust values of 23 kg, 24 kg, and 25 kg with an average of 24 kg or 235.44 N. The variations were influenced by water flow conditions, pump pressure, and engine stability. Overall, the twin waterjet thruster made of stainless steel 304 proved to be effective, consistent, and has the potential for further development with higher engine speeds or different drive types for real ship applications.
Rancang Bangun Alat Bantu Pemasangan Metal Clip Terhadap Holder Plastik Dengan Menggunakan Sistem Pneumatik Mulyadi, Dodi; Ardianto, Nova; Amir, Amir; Karyadi, Karyadi; Khoirudin, Khoirudin
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10197

Abstract

Jig is a special tool that designed to hold, guide, and maintain the stability of a workpiece during the manufacturing process. In this study, the jig was used to hold a plastic holder so that it would not shift when a metal clip was pressed or installed. The use of a jig is expected to improve the work process efficiency and consistency.The objective of this study was to design and manufacture a pneumatic-based press jig for installing metal clips on a plastic holder. This design was developed through a calculation and construction process for optimal application in the production process. FluidSIM software was used to simulate the pneumatic wiring in the pneumatic system. This simulation helps ensure that the pneumatic circuit functions properly and serves as the primary reference for designing the pneumatic wiring in the press jig. The results showed that the press jig was successfully manufactured and operated satisfactorily. Air pressure was set as 0.2 MPa with variable speed control proved to be ideal and optimal. These conditions resulted in a product without defects and could be applied in production processes requiring high quality standards.
Analisis Pengaruh Temperatur Bahan Bakar terhadap Daya Keluaran GT 1.2 pada Beban Maksimal di PLTGU Blok 1 PT Nusantara Power UP Muara Karang Muhammad Fadly Purwanto; Muhammad Ridwan
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10223

Abstract

Efficiency enhancement in Combined Cycle Power Plants (CCPP) is a crucial factor for reducing operational costs and optimizing energy production. One of the key parameters influencing the performance of a gas turbine is the fuel temperature at the combustor inlet. This research aims to quantitatively analyze the effect of fuel temperature variations on the power output, specific fuel consumption (SFC), and thermal efficiency of the GT 1.2 gas turbine. The analysis was conducted using operational data from the Block 1 CCPP of PT Nusantara Power UP Muara Karang under maximum load conditions, with fuel temperature varied from 22°C to 300°C, and validated using Cycle-Tempo software simulation. The results indicate that pre-heating the fuel consistently improves the gas turbine's performance. It was found that the thermal efficiency increased from 32,25 % to 33,19 %, while the specific fuel consumption (SFC) was successfully reduced from 388.21 gr/kWh to 376.65 gr/kWh. It is concluded that fuel pre-heating is a proven and effective strategy for enhancing efficiency and optimizing gas turbine operations in a CCPP.
Analisis Pengaruh Compressor Washing terhadap Efisiensi Thermal pada Turbin Gas PLTGU Blok 3.3 UP Muara Tawar dengan Pendekatan Sankey Diagram Adam Wirya; Muhammad Ridwan
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10231

Abstract

Gas turbines are one of the primary technologies in power generation due to their ability to produce energy quickly and efficiently. However, the performance of gas turbines can decline over time due to fouling on the compressor, which negatively impacts the thermal efficiency of the system. One common maintenance method to address this issue is compressor washing. This study aims to analyze the impact of compressor washing on the thermal efficiency of gas turbines at PLTGU UP Muara Tawar Block 3.3 and to identify the influencing factors, using the Sankey diagram approach. The study uses both primary and secondary data collected between March and August 2024. The results show a slight improvement in thermal efficiency after compressor washing, from a range of 12.319%–13.215% to 12.295%–12.811%. The Sankey diagram reveals an increase in net output and a reduction in compressor work after cleaning. The main factors affecting thermal efficiency include compressor fouling, ambient temperature variation, and the non-operational status of the HRSG unit during the observation period. These findings confirm that compressor washing contributes to restoring gas turbine performance and enhancing overall system efficiency. Keywords: Gas Turbine, Thermal Efficiency, Compressor Washing, Sankey Diagram
Uji Performa Penggerak Perahu Dengan Tipe Twin Menggunakan Propeller 2 Blade Hasdiansah, Hasdiansah
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10293

Abstract

Indonesia, as an archipelagic country, requiresefficient sea transportation systems, particularly forsmall to medium-sized fishing vessels. One innovationdeveloped to support this need is the twin propulsionsystem driven by a single engine. This study aims toevaluate the performance of a 2-blade propeller in atwin screw configuration, focusing on thrust, speed,efficiency, and vessel stability. The experimentalmethod was conducted through direct testing in awater tank using a 22 HP four-stroke gasoline engine,which transmitted power to two propeller shafts via achain and sprocket mechanism. The results show thatthrust increases with engine speed. At 2300 RPM, theaverage thrust obtained was 39.24 N, while at 4600RPM, it significantly increased to 78.48 N. Thesefindings confirm a linear relationship between RPMincrement and thrust production. Overall, the twinpropulsion system with a 2-blade propellerdemonstrated good performance, stability, andresponsiveness to engine speed variations. This studyis expected to serve as a reference for the developmentof propulsion systems for fishing boats and smallvessels that are more efficient and well-suited to theconditions of Indonesia’s archipelagic waters,particularly in the Bangka Belitung region.
Analisa Suhu Pembakaran Sampah Kering Sebagai Potensi Energi Panas Untuk Proses Pengeringan Angga Darma Prabowo; Hadi Prayitno; Dondi Kurniawan; Martinus; Ahmad Yonanda
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10423

Abstract

Waste management poses a significant environmental challenge, yet dry waste holds potential as a renewable energy source through Waste-to-Energy (WTE) technology. This study aims to analyze the potential of utilizing heat from dry waste combustion for drying applications using a hybrid approach of experimental methods and Computational Fluid Dynamics (CFD) simulation. The experimental stage was conducted by burning dry waste in a furnace to obtain the average hot gas temperature, which was measured at 295.33°C. This value was then used as a boundary condition in the CFD simulation of an integrated heat exchanger system within the furnace. Air at a temperature of 30°C was flowed into the heat exchanger with four mass flow rate variations (0.087, 0.092, 0.126, and 0.165 kg/s). The simulation results show that the system is capable of heating the air to a temperature range of 46.05°C to 58.05°C, which is ideal for drying applications. An inverse relationship was found between the mass flow rate and the outlet temperature, where a lower flow rate results in hotter air. This research proves that the heat recovery system from dry waste combustion is technically feasible and has the potential to be a sustainable alternative energy solution for drying processes.
Pengaruh Fraksi Volume dan Perlakuan Awal Terhadap Kekuatan Bending Pada Material Komposit Serat TKKS Candra, Nur Candra Dana Agusti; Aldo, Jefri; Gilang Prahara, Ayesha; Tri Noviyanto, Agung
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10546

Abstract

This study aims to evaluate the effect of fiber volume fraction and alkali surface treatment on the bending strength of composite materials reinforced with empty fruit bunch (EFB) fibers from oil palm (TKKS). The TKKS fibers were soaked in NaOH solutions with concentrations of 2%, 4%, and 6% for fiber fractions of 20%, 40%, and 60%, respectively. The composite was fabricated using the hand lay-up method with epoxy resin as the matrix and tested using the three-point bending method based on ASTM D790. The test results showed that the 20% volume fraction treated with 2% NaOH yielded the highest average bending strength of 39.59 MPa. Meanwhile, the average strength for 40% and 60% fiber fractions were 31.88 MPa and 30.07 MPa, respectively. These findings indicate that increasing fiber volume fraction does not linearly improve mechanical performance, particularly in flexural loading. It can be concluded that the combination of 20% fiber volume fraction and 2% NaOH treatment provides the best performance in terms of bending strength for TKKS-based composites.
Analisis Pengaruh Layer Height dan Printing Speed pada Proses FDM Terhadap Kekuatan Mekanik Filamen PETG Pristiansyah, Pristiansyah; Alvianto, Luthfi Maulana; Afriansyah, Soni; Suzen, Zaldy Sirwansyah
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10583

Abstract

The rapid development of manufacturing technology is marked by the emergence of Additive Manufacturing (AM) or 3D Printing technology. This study aims to analyze the effect of layer height and printing speed on the mechanical strength of PETG material using the Fused Deposition Modeling (FDM) method. The printing process was carried out using an Ender 3 Pro 3D printer with process parameter variations of layer height (0.2, 0.3, and 0.4 mm) and printing speed (40, 50, and 60 mm/s) arranged according to the Taguchi L9 (3²) experimental design. eSUN PETG filament was selected due to its compatibility with the test requirements. The test specimens were fabricated according to the ASTM E23 standard with dimensions of 55 × 10 × 10 mm for impact strength testing. The results show that printing speed has a more significant influence on mechanical strength compared to layer height. The Taguchi analysis indicates that layer height contributes the most to the mechanical performance, followed by printing speed. The optimal combination was obtained at a layer height of 0.2 mm and a printing speed of 40 mm/s. Overall, the study highlights the critical role of process parameter optimization in improving the mechanical strength of 3D printed PETG thermoplastic materials.

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