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All Journal Majalah Ilmiah MOMENTUM JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Rekayasa Material, Manufaktur & Energi APTEK JTTM: Jurnal Terapan Teknik Mesin Jurnal UNITEK Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) SAINSTEK
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Sekolah Tinggi Teknologi Pekanbaru
Aerospace Engineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)

 1 
The Effect of GTAW Welding Current on the Strength of AISI Steel 1045 Abdul Khair Junaidi; Machdalena Machdalena; Weriono Weriono; Hariman Hariman; Firdaus M
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 66 No 1 (2022): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (776.291 KB) | DOI: 10.36842/jomase.v66i1.279

Abstract

Welding is a process of joining materials by melting metal at high temperatures. Gas Tungsten Arc Welding (GTAW) is one of welding method to join metals. This welding process will affect the mechanical properties of a material. So, it is necessary to conduct a study on changes in mechanical properties that occur. This study aims to determine the mechanical properties of AISI 1045 medium carbon steel using the GTAW welding process with a current variation of 80 A and 100 A. The welding was used the AWS EWTh-1 tungsten electrode and ER70S-G filler wire. The type of connection was used a butt weld joint and a single V groove seam with an angle of 60o. The standard of ASTM E8 was used for the manufacture of tensile test specimens. The results of tensile testing with welding current of 80 A was obtained an average stress of 518.463021 N/mm2 and the strain of 19.55%. For welding with a current of 100 A, the average stress was 548.814727 N/mm2 and the strain of 26.44%. Based on the fracture that occurred in the specimen, the critical area for fracture was the Heat Affecting Zone (HAZ), which the area has undergone a phase change during the cooling process. The weld area of connection part in the welding process has higher strength than the HAZ area.
Effect of Gear Transmission System to Vibration Test Machine Abdul Khair Junaidi; Weriono Weriono; Nazaruddin Nazaruddin; Deden MS
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.347

Abstract

This research aims to investigate the vibration analysis for equipment test of chassis. The frame model of the gear transmission vibration test is developed. The prototype of the vibration and noise testing tool was constructed for the gear transmission system. The vibration equipment test consists of three gears that function as a gear transmission. The chassis is considered to be one of the vital elements of equipment. The rotation of gears and shafts can occur the vibration. The simulation with the 3D model using ANSYS was resulted in structure analysis. The simulation was resulted in total deformation, equivalent strain, and equivalent stress where the structure of the equipment was definitely safe and had good stability.
Effect of Venting Equipment Installation on Oil Production Stability Weriono Weriono; Abdul Khair Junaidi; Kabul Indarto
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 3 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i3.377

Abstract

Electric Submersible Pumps (ESPs) are one of the most prominent artificial lifting methods in the oil and gas industry today. In the operation of Electric Submersible Pumps on wells in the Ko-Pet field, a gas lock may occur when liquid and gas separate in the tubing above an electric submersible pump and inside the pump. This study aims to determine the effect of installing venting equipment on oil well production. Venting equipment was installed in three oil wells: KI090, KI183, and KI495 in the Ko-Pet oil field. From the production data, it was found that the installation of Venting Equipment affected production stability, namely by increasing the fluid that could be pumped by the ESP to the surface facility. The installation of venting equipment increased oil production by 1251 barrels or an increase of 8%. Electrical Submersible Pump performance was more stable because the gas lock problem can be overcome by continuously releasing the casing pressure with venting equipment.
Structural of Pedicle Screw on Biomechanical Characteristics of Spinal Scoliosis Correction Deformation Weriono, Weriono; Rusli, Meifal; Dahlan, Hendery; Sahputra, Roni Eka
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 1 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v69i1.529

Abstract

Scoliosis correction methods often involve orthopedic procedures such as implant placement to stabilize movement and correct spinal deformity. The choice of surgical method is highly dependent on the location and nature of the fracture. Fractures with significant damage require a different approach compared to cases of minor injuries. Three dimensional finite element model of C1–L6 spine was used to simulate conditions with single cylindrical implant fixation under a vertical downward loading force 50 N and cylindrical screw types made of titanium alloy. The human spine, encompassing the cervical, thoracic, and lumbar regions, exhibits a complex biomechanical response when subjected to physiological loads. Displacement that occurs due to axial force can be the result of pedicle screw movement with vertebrae of the spine. Installation of 4 (four) rows of pedicle screws reduces the release of pedicle screws from the spine. The use of more fixation can reduce the stress distribution on the vertebrae of the spine.
Investigating the Influence of Time Variation on Electric Motor Vibration Characteristics Rinaldi, Rinaldi; Weriono, Weriono; Hendri, Hendri
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 2 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v69i2.537

Abstract

This research aims to analyze vibrations in a 1750 HP Westinghouse electric motor. The electric motors have an important role in the company's operations. Hence, the vibration analysis may crucial to carried out for optimal performance and prevent potential damage. In this research is to find out the vibrations that occur according to the permitted vibration standards and to find out the parts of the machine that have an influence in order to minimize the vibrations that occur. Vibration test was carried out using the vibration analyzer as a measuring instrument and temperature testing. The results of the vibration analysis was obtained the vibration values ??on the Drive-End and Non-Drive End sides were still moderate and suitable for operation. The highest vibration value occurred in the first 10-minute test in the Non-Drive End (NDE) vertical direction with an rms value of 0.083 inch/s.
Co-Authors Abdul Khair Junaidi Achmad Jusuf Zulfikar Adi Isra Adi Isra . Aditya Sapta Nugraha Ahmad Marabdi Siregar Ahmad Rambe, Ibrahim Ajar Darmawan Akmal, Nasrol AMRU SIREGAR Bambang Prahoro Aji Candra Irianto Chandra Aditiya Darianto Darianto Darianto, Darianto Deden MS Din Aswan Ritonga Fadhli Palaha Felix Sigalingging Firdaus M Hakim Nasution, Lukman Hariman Hariman Harnis, Emri Juli Haryon, Tri Hendery Dahlan, Hendery Hendri Hendri Holyness Nurdin Singadimedja Husnadi, Andi Hypocrates Sihite, Hendra Indra Hermawan Indra Hermawan Irawansyah, Purnama IRWANSYAH Isra, Adi Joko Joko Julnaidi, Julnaidi Junaidi JUNAIDI Kabul Indarto Karo Karo, Septa Fernando Kurniawan, Mauliade M. Dalil M.Y. Yuhazri Meifal Rusli, Meifal Mirfaturiqa Mirfaturiqa, Mirfaturiqa Muhammad Idris Muhammad Idris Muhammad Idris N, Nazarudin Nasution, Lukman Hakim Nazaruddin Nazaruddin Nazaruddin Nazaruddin, Nazaruddin Pertiwi, Eka Pratiwi, Sheliona Rinaldi Rinaldi . Rinaldi Rinaldi Rinaldi, Rinaldi Sahputra, Roni Eka Sepfitrah, Sepfitrah Siswo Pranoto Sopyan Hadi Suripto, Heri Syafril Syafar Syafril Syafar TO Rajagukguk Yudi Aditya