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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 12 Documents
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Search results for , issue "Vol. 6 No. 2 (2025)" : 12 Documents clear
CHARACTERISTICS OF AGAVE SISALANA NATURAL FIBER COMPOSITES WITH SEAWATER TREATMENT Raviko, Johansyah; Purnowidodo, Anindito; Wahyudi, Slamet; Azmi, Muhammad
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 2 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.02.11

Abstract

This study focuses on the more environmentally friendly treatment (seawater treatment) than classical chemical treatments (natural fibers and a new trend of developing epoxy resin matrix composites with natural Agave Sisalana fiber reinforcement). The current study investigated natural agave sisalana fiber soaked in seawater for three days and seven days to increase the adhesion of the fiber-matrix interface on the epoxy resin composite with natural agave sisalana fiber. The best single fiber tensile strength test was caught on the 7-day treatment sample, where the loss was 898.49 MPa, and the modulus of elasticity was 1418.42 MPa. From the results of the SF composite tensile strength test, the highest tensile strength value was obtained in the 7-day seawater treatment sample of 103,734 MPa, the elongation at break value was 23,954 MPa, and the modulus of elasticity was 4,576 MPa. The data revealed that samples with the given treatment had higher mechanical properties than those without treatment. The loss of impurities in the sisal fiber after seawater treatment leads to a better bond between the fibers and the matrix, where the high value of tensile strength was influenced by the interface bond between the sisal fiber and the strong epoxy resin matrix acting as a load support. Furthermore, the macro photo data reveals that the results of the tensile testing fracture experienced a ductile fracture because it was marked that the fiber pull-out mechanism dominated in each specimen, piloting the reinforced sisal fiber composites experience slow cracking. In conclusion, seawater treatment may strengthen the fibers' mechanical surface properties by removing the outer layers of hemicellulose, cellulose, and lignin, causing the fiber-matrix interface to increase, leading to higher direct impact and tensile strength than composites with no seawater treatment.
INVESTIGATION OF SLEEVE BEARING FAILURES IN API 610 BB3 PUMPS FOR WATER INJECTION APPLICATION Machfud, Adam Aliyya; Kriswantoro, Yosep Joko; Nurrahman, Ardhi Febrian; Priambudi, Aris
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 2 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.02.12

Abstract

The reliability of multistage centrifugal pumps, particularly API 610 BB3 types, is critical in water injection systems commonly used in oil and gas operations. This study aims to identify and analyze the dominant failure modes in sleeve bearings used in water injection pump applications, considering comprehensively existing design, operational, and maintenance aspects. The investigation covers analysis using not only equipment condition data (vibration, temperature, oil analysis) but also material examinations, such as optical microscopy, SEM (Scanning Electron Microscope), and EDS (Energy Dispersive Spectroscopy). The results indicate that the root cause of the sleeve bearing failure is lubrication failure, which is attributed to several contributing factors, including improper ISO Code settings for oil analysis and inadequate bearing temperature protection settings. Low-effort and high-impact improvements are proposed, including changing the lube oil type from mineral-based to synthetic-based, using lube oil with higher viscosity, adjusting the ISO Code for oil analysis, and modifying the bearing temperature protection settings. The results of this study are expected to provide a deeper understanding of the sleeve bearing failure mechanism and its implications for equipment reliability, serving as the basis for developing more effective mitigation strategies.

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