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All Journal Jurnal Elementer (Elektro dan Mesin Terapan) Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) ARMATUR : Artikel Teknik Mesin dan Manufaktur
Eko Wahyu Saputra
Universitas Lampung
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Pemodelan dan simulasi pengeboran pada proses pengeboran tulang dalam pembedahan ortopedi Eko Wahyu Saputra; Yanuar Burhanuddin; Suryadiwansa Harun
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol 4 No 1 (2023): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v4i1.3359

Abstract

Dalam pembedahan ortopedi, mata bor berfungsi sebagai alat bantu membuat lubang untuk sekrup dalam upaya perbaikan fraktur atau pemasangan perangkat prostetik. Selama proses pengeboran berlangsung akan meyebabkan peningkatan suhu pada area pengeboran, kenaikan suhu melampaui batas yang diijinkan akan mengakibatkan matinya sel-sel tulang akibat kehilangan suplai darah yang disebut dengan nekrosis. Untuk mencegah peningkatan suhu berlebihan tersebut, salah satu cara yang dapat dilakukan adalah dengan melakukan pemilihan geometri mata bor menggunakan finite-element analysis model tiga dimensi untuk mendapatkan nilai temperatur pengeboran tulang yang serendah mungkin. Penelitian ini berfokus pada nilai point angle 118°, yang dikombinasikan dengan nilai helix angle 13°, 20°, 28° dan 30°. Dari kombinasi tersebut menghasilkan nilai temperatur optimal pada helix angle 28° dengan suhu maksimum pada 38.814° C.
OPTIMIZING MAINTENANCE FREQUENCY ON INSTRUMENTATION WITH THE RELIABILITY CENTERED MAINTENANCE METHOD AT PT X Mochammad Resha; Eko Wahyu Saputra; Chandra Salim
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 6 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i6.4514

Abstract

In facing maintenance challenges in offshore oil and gas operational platforms, determining instrumentation components based on Safety and Environment Critical Element (SECE) with the Reliability Centered Maintenance (RCM) method requires component repair data in the 2019-2023 time interval. So far, maintenance intervals have been carried out conventionally without considering historical reliability data, which has led to over-maintenance and under-maintenance. This study aims to optimize the maintenance frequency of SECE instrumentation with the RCM approach to improve technical, operational, and economic efficiency, as well as ensure compliance with safety and environmental standards. The methodology used includes data collection, technical document analysis, reliability calculations, and the development and re-implementation of maintenance work in the system. The calculation results show that several instruments have a high level of reliability, such as the pressure transmitter at 99.86%, while the shutdown valve recorded the lowest reliability of 97.86%, which based on a significance test can be extended to a 12-month maintenance interval. Optimizing the maintenance interval resulted in a significant reduction in man-hour requirements, up to 27% on the entire platform while maintaining system reliability. Technical recommendations were also proposed, including the use of statistical approaches such as the Weibull distribution for further analysis. This research shows that a data-driven RCM approach not only improves system reliability but also resource efficiency and overall occupational safety.
Structural Optimization of H-Type Press Table Design Parameters Using Taguchi Method and Finite Element Analysis Eko wahyu Saputra
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 12 No 1 (2026): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v12i1.6945

Abstract

This study aims to analyse the influence of load variation, material type, and thickness on the Von Mises stress values of an H-type press table using Design of Experiments (DOE) based simulation approach. This study was conducted to determine the maximum strength of the press machine table design as an effort to prevent structural failure during the operation of the press machine. The “Smaller is Better” signal-to-noise (S/N) ratio criterion was applied to obtain the minimum stress value under loading conditions. Lower stress values indicate a safer load distribution, which can improve the safety factor of the H-type press machine table design. In this study, three load levels were used: 10, 20, and 30 tonnes; three material types: Mild Steel, High-Strength Steel, and Alloy Steel; and three variations in press table thickness: 30, 40, and 50 mm. The simulation results show that as the applied load increases, the Von Mises stress also increases. Changes in the thickness of the press table have the greatest influence on stability or response variation, while the material type has a relatively small influence compared to the other factors. Changes in thickness affect the Von Mises stress value depending on the material type, and vice versa. This indicates that the three parameters interact, meaning a change in one factor can produce different results depending on other conditions. The highest average stress value was obtained on the press table at 104.45 MPa for the combination of High-Strength Steel with a thickness of 30 mm and a load of 30 tonnes, while the lowest stress value of 21.97 MPa was obtained for Alloy Steel with a thickness of 50 mm and a load of 10 tonnes.
Co-Authors Chandra Salim Mochammad Resha Suryadiwansa Harun Yanuar Burhanuddin