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Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Polimesin mostly publishes studies in the core areas of mechanical engineering, such as energy conversion, machine and mechanism design, and manufacturing technology. As science and technology develop rapidly in combination with other disciplines such as electrical, Polimesin also adapts to new facts by accepting manuscripts in mechatronics. In Biomechanics, Mechanical study in musculoskeletal and bio-tissue has been widely recognized to help better life quality for disabled people and physical rehabilitation work. Such a wide range of Polimesin could be published, but it still has criteria to apply mechanical systems and principles. Exceeding the limitation has been a common reason for rejection by those outside the scope. Using chemical principles more than mechanical ones in material engineering has been a common reason for rejection after submission. Excessive exploration of the management within the discipline of Industrial Engineering in the manufacturing technology scope is also unacceptable. The sub-scope biomechanics that focuses on ergonomics and does not study movement involving applied force on the bio-tissue is also not suitable for submission.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 503 Documents
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Vibration analysis for failure detection in clean water distribution pumps: A case study in an oil and gas training center Novianto, Hernawan; Sujono, Sujono
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5959

Abstract

The Clean Water Distribution Pump plays a crucial role in delivering clean water to consumers. Over time, increased noise levels indicate potential damage to pump components, which, if left unaddressed, can lead to severe failures and costly repairs. One of the analyzes of pump damage is vibration analysis. With vibration analysis, damage to the pump in the form of misalignment, mechanical looseness, bent shaft, bearing damage, worn gears, cavitation can be identified. The purpose of this research is to determine the characteristics of vibrations that occur in the pump, so that we can detect damage and failures that occurs and suggest maintenance action. Vibration analysis is carried out using a vibration analyzer to determine the vibration spectrum that occurs in the axial, radial and tangential directions, then analyzing the type of damage and appropriate maintenance to be carried out.  The results showed that this pump indicated: extreme motor free end bearing looseness with a severity score of 99/100, serious motor free end bearing wear with a severity score of 72/100, serious motor drive end bearing looseness with a severity score of 53/100, and moderate motor drive end bearing wear with a severity score of 37/100. and based on the ISO 10816-3 standard, it is recommended that the motor free end bearing be replaced because vibration will cause damage and for the drive end bearing motor it is only recommended to operate for a short time.
A framework for surface profile optimization in sinker-edm via response surface methodology Rohman, Rohman; Sukarman, Sukarman; Ulhakim, Muhamad Taufik; Supriyanto, Danang
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5741

Abstract

Sinker Electrical Discharge Machining (SEDM) is a powerful technique used for shaping hard materials and creating complex designs. SEDM effectively machines hardened steel, titanium, and tungsten carbide, materials challenging for conventional methods. This study aims to identify the optimal surface profile (Ra) as a response variable in the SEDM process. This study utilized hardened SKD11 as the workpiece and graphite as the electrode, employing Response Surface Methodology (RSM) for optimization. The investigation focused on the pulse current, spark-on time, and gap voltage as the input parameters. The findings revealed that Sample 7 achieved the smoothest surface (at Ra = 10 µm), while Sample 13 had the roughest (at Ra = 20 µm). The analysis of these results determined the ideal conditions for the pulse current at level 1, spark-on time at level 3, and gap voltage at level 3, resulting in a surface profile of 10.2 microns. The successful application of RSM optimization in SEDM significantly contributes to the precision machining of alloy steels, which plays a crucial role in material-processing operations.
Material selection for coal flow breaker plate based on fatigue life analysis using finite element method Lubis, Asnawi; Hadi, Kiagus Abdul; Akmal, Jamiatul; Badaruddin, Mohammad
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.5407

Abstract

Fatigue failure in the coal flow breaker plate of the CV507 screen at PT. Bukit Asam–Tarahan Port has led to production delays and increased maintenance requirements. This study investigates the optimal material selection for the coal flow breaker plate based on fatigue life under bulk impact loading. The structure, modelled as a fixed vertical plate, was analyzed using the Finite Element Method (FEM) with two material options: ST37 and ST52, each at thicknesses of 15 mm and 20 mm. Static structural and explicit dynamic simulations were performed in ANSYS, using an impact load of 15 kN measured from site conditions. The results indicate that ST52 with a 15 mm thickness experienced the highest von Mises stress (2,223.4 MPa) and deformation (14.41 mm). Increasing the thickness to 20 mm reduced stress to 1,465.4 MPa and deformation to 10.99 mm, extending fatigue life to 8.54 months, making it the most suitable option. These findings provide a basis for selecting materials that enhance durability and minimize downtime in coal processing operations.
Numerical simulation of the effect of synthetic jet actuators on aerodynamic performance in high-lift device configurations Yamin, Mohamad; Apriyadi, Kukuh Ivan; Firmansyah, Riyan
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6208

Abstract

The aviation industry faces significant challenges in reducing environmental impacts, particularly fuel consumption and  noise pollution.  To  address  these  issues,  various  aerodynamic optimization and flow control technologies have been developed to enhance aircraft efficiency. One promising approach is Active Flow Control (AFC), particularly in wing-flap configurations. However, cambered flaps can induce flow separation, leading to increased drag and reduced aerodynamic performance. This study investigates the application of AFC using Zero Net Mass Flux (ZNMF) to mitigate flow separation and improve aerodynamic efficiency. Numerical simulations were conducted using ANSYS Fluent, employing the Delayed Detached Eddy Simulation –Spalart-Allmaras (DDES-SA) turbulence model to accurately capture flow separation and vortex structures. The research explores a novel ZNMF geometry, analyzing different frequency and velocity parameters to determine the optimal settings for suppressing flow separation. The results demonstrate that  the  Synthetic  Jet  Actuator  (SJA)  significantly enhances aerodynamic efficiency by optimizing the CL/CD  ratio through drag reduction without major lift loss. Optimal performance is achieved at frequencies of 150–300 Hz and jet velocities of ≥150 m/s, stabilizing airflow, reducing flow separation, and suppressing vortex formation. At an AOA of 0°, a frequency of 100 Hz provides the greatest CL reduction, while at an AOA of 10°, frequencies of 100–250  Hz  substantially improve  the  CL/CD   ratio.  This  study confirms that SJA is an effective strategy for drag reduction and aerodynamic optimization. These findings highlight its potential to improve aircraft performance, reduce fuel consumption and CO₂ emissions, and contribute to more sustainable aviation technology
Fabrication and mechanical characterization of binderless boards from sugarcane bagasse fibers Hasanuddin, Iskandar; Faurantia, Faurantia; Mawardi, Indra
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6078

Abstract

Agricultural   waste  management  is  a  pressing  environmental concern, as traditional disposal methods like incineration contribute to pollution. This study explores the fabrication and evaluation of binderless boards made from sugarcane bagasse fibers, eliminating the need for synthetic binders. Bagasse fibers were processed at mesh sizes of 20 and 40, then hot-pressed at 190°C under 9.6 MPa pressure for 15 and 25 minutes, achieving a targeted thickness of 10 mm. The physical and mechanical properties, including density, water absorption, thickness swelling, Modulus of Rupture (MOR), and Modulus of Elasticity (MOE), were analyzed. Results showed that particle size and pressing time significantly influenced board properties. The highest performance was  observed in  the  E25 sample (40-mesh, 25-minute pressing), with  a  density of  0.52 g/cm³, MOR of 2.69 MPa, MOE of 293.82 MPa, water absorption of 134.66%, and thickness swelling of 16.80%. These findings suggest that optimizing particle size and pressing conditions enhances binderless board strength and dimensional stability, making sugarcane bagasse a viable raw material for sustainable panel production.
Prediction of aluminum alloy mechanical properties using synthetic data generated by generative adversarial networks Utami, Lega Putri; Armijal, Armijal; Leni, Desmarita; Kasmar, Andre Febrian
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6084

Abstract

Machine learning models are widely used to predict the mechanical properties  of aluminum  alloys.  However,  their  accuracy  is  often hindered   by  the  scarcity  of high-quality   tensile  test  data,  as experimental   data  collection  is  costly  and  time-consuming.  To address this limitation, this study employs Generative Adversarial Networks  (GANs)  to  generate   synthetic   tensile  test  data  for aluminum alloys, improving the accuracy of predictive models. The dataset consists of 200 real samples containing the compositions of nine chemical elements and two mechanical properties-Yield Strength (YS) and Ultimate Tensile Strength (UTS). A trained GAN model   was  used  to  generate   1,000  synthetic  samples,  whose statistical similarity to the original dataset was validated using the Kolmogorov-Smirnov (KS)  test and Pearson  correlation  analysis. The results confirmed  that all synthetic variables  retained  similar distributions and correlation patterns to the original dataset. To evaluate the impact of synthetic data on predictive  accuracy,  three machine learning algorithms-Random Forest Regressor (RF), Gradient Boosting Regressor (GBR), and Ada Boost Regressor (ABR)-were tested under two training schemes: (1) synthetic data for training and real data for testing and (2) real data for both training and testing. The RF model showed the highest improvement in UTS prediction,  with reductions of 38.3% and 46.3% in Mean Absolute Error (MAE) and Root Mean Square Error (RMSE),  respectively. The GBR model exhibited notable enhancements in YS prediction, with MAE and RMSE reductions of22.5% and 28.3%. These results demonstrate that GAN-generated  synthetic data is highly effective in  improving  machine  learning  predictions   of aluminum  alloy properties, particularly when experimental data is limited.
Fabrication and mechanical properties of copper and silicon carbide-reinforced aluminum metal matrix composites processed by powder metallurgy Endramawan, Tito; Kusmayadi, Adi; Suwandi, Dedi; Hudayef, Ayatullah
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6238

Abstract

Metal-matrix composites (MMCs) offer superior mechanical properties, making them ideal for advanced engineering applications. However, achieving optimal strength and hardness remains a challenge. This study investigated the role of copper (Cu) reinforcement in enhancing the mechanical performance of aluminum-silicon carbide (Al-SiC) composites fabricated via powder metallurgy. Composites were synthesized with 5 wt.% and 10 wt.% Cu and sintered at 500°C, 550°C, and 600°C. The results indicate that increasing Cu content significantly improved hardness and bending strength, with the 80%Al–10%Cu– 10%SiC composition exhibiting the highest hardness (96.86 kg/mm²) and bending strength (29.08 MPa) at 600°C representing a 37.86% and 74.03% increase, respectively, compared to the 5 wt.% Cu composites. Microstructural analysis confirmed uniform Cu and SiC dispersion, improved matrix bonding, and reduced porosity at elevated sintering temperatures. These findings highlight the potential of Cu-reinforced AlSiC composites for high-performance applications, particularly in wearresistant and structural components.
Fabrication and characterization of antioxidant biodegradable plastic from mangrove starch, chitosan, and clove essential oil Syaubari, Syaubari; Dawood, Jimmy; Zaki, Muhammad; Bachtiar, Dandi
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6394

Abstract

The development of  biodegradable plastics offers a  sustainable alternative to conventional ones, reducing environmental impact. This research is the fabrication and characterization of biodegradable plastic films derived from large-leafed mangrove (Bruguiera gymnorrhiza) starch, chitosan, and clove essential oil (CEO)  as  an  antioxidant  additive.  Glycerol  was  used  as  a plasticizer, while carboxymethyl cellulose (CMC) and carrageenan were incorporated as thickeners. The effects of glycerol (2.7–9 ml), chitosan (4– 6% m/m), and CEO (0–8% m/m) concentrations on mechanical properties, morphology, and biodegradability were examined. Fourier-transform infrared (FTIR) spectroscopy confirmed the successful incorporation of chitosan and CEO. Scanning electron microscopy (SEM) revealed surface roughness and cavities due to incomplete chitosan dissolution. The optimized formulation (3% starch, 5 ml glycerol, 5% chitosan, and 5% CEO) exhibited superior mechanical properties, with a tensile strength of 710.98 MPa, Young’s modulus of 582.65 MPa, and elongation at break of 121.4%. Soil burial tests demonstrated complete degradation within 14 days. These findings highlight the potential of mangrove starch-based bioplastics for food packaging and eco-friendly applications.
Analysis of mechanical properties, microstructure, and distortion of Al6061-T6 alloys plate using GTA and GMA welding process Suherman, Suherman; Muharnif, Muharnif; Marzuki, Marzuki; Lubis, Yusuf; Pohan, Muhammad Ade syahputra; Aulia, Rakha Ramdan; Ali, Rizki M; Abdullah, Ilmi; Wan Hamzah, Azmi
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6261

Abstract

This study compares the effect of filler metal and welding current of gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) on Aluminium alloy Al6061-T6. Three different filler metals, ER4043, ER4047, and ER5356, were used with the GTAW welding process. The welded joints were created at three different welding currents (120, 130, and 140 A) by the GMAW with filler metals ER5356. Optical and scanning electron microscopy (SEM) is used to analyze the surface fracture of impact test welding joints. The results showed that the GMAW process had the most optimum Ultimate Tensile Strenght (UTS) compared to the GTAW welding joint, especially for welding current 130 A. The impact strength of ER4047 filler metal with the GTAW process is higher than other joints (61 J/cm2). Optimum conditions were obtained by the GMAW welding process using a welding current of 130 A with maximum tensile strength and impact strength of 350 MPa and 53 J/cm2, respectively. SEM analysis showed obtained Mg2Si a globular morphology in ER4047 and ER5356 filler metals, and the dimples fracture is indicated at all joints with the GMAW and GTAW processes. Furthermore, increasing welding current by the GMAW process causes higher angular distortion, reduced vickers hardness but does not significantly affect the weld bead. Overall, the GMAW produces better physical and mechanical properties of weld joint compared to GTAW for all types of filler metals but results in greater angular distortion
Design and efficiency optimization of off-grid solar-wind hybrid power systems in Bahuluang tourism village Hidayat, Akmal; Mudarris, Mudarris; Fakhri, M. Miftach; Iriandy, Iriandy; Rahman, M. Haristo
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.5636

Abstract

Access to reliable and sustainable energy remains a critical challenge in remote regions, limiting socio-economic growth and the development of tourism-based communities. In line with Indonesia’s Net Zero Emissions (NZE) targets and national energy equity initiatives, this study explores the planning and efficiency optimization of a Hybrid Renewable Energy System (HRES) for Bahuluang Tourism Village. The proposed off-grid system integrates wind turbines, solar Photovoltaic (PV) panels, and battery storage to minimize fossil fuel dependence and environmental impact. Using literature review and simulation-based analysis with HOMER software, the study identifies an optimal configuration comprising 172.77 kW of solar PV, 36.82 kW of wind turbines, 98 batteries (1.2 kWh each), and a 50-kW inverter. The system generates approximately 209,851 kWh annually—82.4% from wind and 17.6% from solar—efficiently meeting the local demand of 424.1 kWh per day. This hybrid system supports sustainable energy access, reduces carbon emissions, and promotes the energy transition in line with Indonesia’s clean energy goals.

Page 42 of 51 | Total Record : 503

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