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Khairul Anam
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Redaksi International Journal of Mechanical Engineering Technologies and Applications (MECHTA), Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Published by Universitas Brawijaya
ISSN : -     EISSN : 27223213     DOI : https://doi.org/10.21776/ub.mechta
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering
International Journal of Mechanical Engineering Technologies and Applications (MECHTA) is published by Mechanical Engineering Department, Engineering Faculty, Brawijaya University, Malang, East Java, Indonesia. MECHTA is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. MECHTA accepts submissions from all over the world, especially from Indonesia. MECHTA aims to provide a forum for international academicians, researchers, and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of MECHTA is specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in the English Language.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 244 Documents
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EFFECT OF ALKALI TREATMENT ON MECHANICAL AND THERMAL PROPERTIES OF SISAL FIBER FOR COMPOSITE APPLICATIONS Parahdiba, Nursyahbani Putri; Anam, Khairul; Gapsari, Femiana; He, Rui-En
International Journal of Mechanical Engineering Technologies and Applications Vol. 7 No. 1 (2026): January - June
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//MECHTA.2026.007.01.7

Abstract

The demand for sustainable and high-performance composite materials has driven extensive research on natural fiber reinforcements, including sisal fiber, to enhance their mechanical and thermal properties. However, the inherent hydrophilicity and weak interfacial adhesion of sisal fibers limit their effectiveness in composite applications. In this study, untreated and alkali-treated sisal fibers were characterized using tensile testing, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The results showed that alkali treatment reduced tensile strength from 2080 MPa to 1142.1 MPa but slightly increased elongation at break from 2.5% to 2.9%, while XRD analysis indicated a higher crystallinity index, and TGA confirmed improved thermal stability with an increased decomposition temperature from 220°C to 260°C. These findings provide valuable insights into optimizing sisal fiber treatment for enhanced fiber-matrix interactions, contributing to the development of more durable and sustainable natural fiber composites.
PERFORMANCE MODELING OF PLTU PAITON 1 WITH VARIATIONS IN MAIN STEAM PRESSURE, TEMPERATURE, AND CONDENSER PRESSURE USING GATECYCLE Loasana, Okto Rosario Nisen; Iqbal, Muhammad; Soeparman, Sudjito; Yuliati, Lilis
International Journal of Mechanical Engineering Technologies and Applications Vol. 7 No. 1 (2026): January - June
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//MECHTA.2026.007.01.8

Abstract

Paiton Unit 1, 400 MW power plant, has been the subject of a detailed performance analysis utilizing modelling and simulation techniques employing GateCycle software. This study encompasses an evaluation of the impact of variations in main steam pressure, condenser pressure, and main steam temperature on key performance parameters, including thermal efficiency, heat rate, condenser duty, and power generation. The model underpinning this analysis was developed based on the heat balance scheme of Paiton Unit 1 PLTU, and its validity was confirmed through validation using operational data. The simulation results demonstrate that an increase in main steam pressure and temperature leads to enhanced thermal efficiency and output power of the plant, while an increase in condenser pressure results in reduced efficiency and net power generation. A decrease in condenser pressure increases the pressure difference between the turbine and condenser, thereby facilitating greater energy conversion to mechanical power. Heat rate analysis reveals that the heat rate value decreases with increasing main steam pressure and temperature and decreasing condenser pressure, indicating an increase in system efficiency. This study validates the hypothesis that optimization of key operational parameters at Paiton Unit 1 PLTU can enhance plant efficiency and reduce fuel consumption, thereby providing both technical and economic benefits.
SUSTAINABLE CORROSION INHIBITION OF COPPER USING SANTOL (SANDORICUM KOETJAPE) FRUIT PEEL EXTRACT IN ACIDIC MEDIUM Ainunsyah, Zul; Gapsari , Femiana; Darmadi, Djarot B.; Sasmito, Muhammad
International Journal of Mechanical Engineering Technologies and Applications Vol. 7 No. 1 (2026): January - June
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//MECHTA.2026.007.01.9

Abstract

Corrosion control is crucial to material protection, particularly in industrial applications where metal degradation leads to significant economic losses. One of the major challenges in corrosion research is finding effective and eco-friendly inhibitors that can replace traditional toxic chemical inhibitors. This study explores the use of Santol (Sandoricum koetjape) fruit peel extract as a potential green inhibitor for copper corrosion in a 1 M HNO3 solution. Electrochemical techniques, including potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS), were used to evaluate the inhibition efficiency of the extract. The results showed a significant reduction in the corrosion rate, with an inhibition efficiency of 77.33% from PDP analysis and 97.50% from EIS measurements. The corrosion current density decreased from 1408.30 microA to 319.25 microA, and the charge transfer resistance increased from 22.56 Ohm to 902.88 Ohm. Santol fruit peel extract effectively inhibits copper corrosion, promoting the development of sustainable corrosion inhibitors and using agricultural waste as an alternative to conventional chemical inhibitors.
DESIGN AND CONSTRUCTION OF A SIMPLE FATIGUE TESTING DEVICE FOR PUSH BUTTONS USING PNEUMATIC AND DC MOTOR SYSTEMS BASED ON PROGRAMMABLE LOGIC CONTROLLER Hidayah, Alfi Noer; Zaenudin, Mohamad; Saleh, Yasya Khalif Perdana
International Journal of Mechanical Engineering Technologies and Applications Vol. 7 No. 1 (2026): January - June
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//MECHTA.2026.007.01.10

Abstract

Button fatigue testing remains prohibitively expensive for SMEs due to commercial systems costing >$5,000. This study develops a low-cost tester of less than $500, PLC-controlled using dual actuation systems (pneumatic and DC motor) to evaluate pushbutton durability under 100–300 g loads. The pneumatic system maintained extensive pressure stability of ±0.00 MPa at 0.04 MPa for 200 g testing but exhibited 20.64% load deviation due to compressor-induced 600 g transient spikes during reservoir refills. Alternatively, the DC motor system achieved high-precision 100 g testing at 270 rpm with 3.98% deviation with stable speed around 260–278 rpm but failed operationally at 540 rpm for 300 g loads due to vibration-induced signal disruption after cycle 277. Moreover, pneumatic actuation proved more suitable for loads lower than 200 g, completing 10,000 cycles despite load spikes, while a DC motor maintains stability at lower than 200 g with near-constant force below 500 rpm. This study establishes a clear implementation framework: pneumatic systems for production-line screening where ±20% deviation is acceptable per ISO 9241-410 and DC motor systems for calibration-grade testing requiring <5% deviation. The prototype bridges the affordability gap for SMEs and educational institutions, with future work targeting vibration dampeners and pressure accumulators to achieve ASTM E467-21 compliance.

Page 25 of 25 | Total Record : 244

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