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JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY
Published by Universitas Medan Area
ISSN : 25496220     EISSN : 25496239     DOI : -
Core Subject : Science, Engineering,
Energy Industrial & Manufacturing Engineering Mechanical Engineering
This journal is a publication media of research results in the field of machinery that has been carried out by academics or practitioners by following predetermined rules. The research areas include: manufacturing, engineering materials, energy conversion and renewable energy, as well as other machinery fields, such as: mechatronics, hydraulics, plantation tools, and engine maintenance management systems. Each paper that has been sent will be reviewed by a team of experts in their field, and published online through the http://ojs.uma.ac.id/index.php/jmemme url address. This journal was founded in 2017 and has been registered with a print version of ISSN 2549-6220 and the online version of ISSN 2549-6239.
Arjuna Subject : -
Articles 226 Documents
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Performance Analysis of Centrifugal Pump Head in Series and Parallel Circuit Wilarso; Rendi Reshudin
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 2 (2025): December 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i2.16083

Abstract

When the pump starts working and the fluid flow capacity is different from the pump capacity, an analysis is performed on the head value obtained from the pump whose value is insufficient to the required capacity. Analysis of the pump head capacity value is necessary to ensure that the pump can operate efficiently and according to system requirements. The method used to calculate the pump head value includes a theoretical approach and quantitative calculations. The pump head calculation is carried out by applying the Reynolds equation and other fluid mechanics principles, as well as considering factors such as flow velocity, pipe diameter, and fittings or supporting components used. The purpose of this analysis is to determine and calculate the optimal pump head value in a series or parallel arrangement so that the system can work under ideal conditions. The results of this study indicate that the pump head in a series arrangement is 3.9 m, while the Head value for a parallel arrangement is 2.2 m. The head loss value for the series arrangement is 0.000007108 or 71.08 {\times10}^{-6}, while the head loss value for the parallel arrangement is \ 0.000001197 m or 11.97 {\times10}^{-6}. Pumps with a series configuration are used to obtain higher pressures. Pumps with a parallel configuration are used to obtain larger flow rates.
Preliminary Engineering Study of Titanium Carbide and Nickel Foam as Electrodes for Urea Fuel Cells (DUFC) Aufar Fadhlir Rahman; Hijrah Muhammad; Jauhari Amanina Muhammad; Yoky Edy Saputra
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15656

Abstract

The utilization of sustainable alternative energy is a major focus in the development of future technologies. One innovative approach is the utilization of urea as a fuel in Direct Urea Fuel Cells (DUFCs), which is environmentally friendly and low-cost. This study aims to synthesize Ti₃C₂ (MXene) material combined with nickel foam substrate (Nickel Foam, NF) as an active electrode in DUFCs. Ti₃C₂ was synthesized through a selective etching process against Ti₃AlC₂ with HF solution and then combined with NF using a hydrothermal coating method. The synthesis and fabrication processes were carried out based on engineering principles, which emphasize efficiency, work safety, quality control, and material sustainability. The results of structural and morphological characterization using SEM, XRD, and FTIR showed that Ti₃C₂ was evenly distributed on the surface of the nickel foam and formed a large active surface. Electrochemical tests using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques show that the Ti₃C₂/NF electrode has high electrocatalytic performance in the urea oxidation reaction. The resulting output power is significantly increased compared to conventional electrodes. This reflects the successful application of nanotechnology-based material design principles in an engineering context. By integrating the principles of professionalism, sustainability, and technological innovation, this research contributes to the development of clean and sustainable energy systems relevant to future energy needs. The Ti₃C₂/NF electrode has great potential for use in industrial-scale environmentally friendly fuel cells.
Characterization of HDPE Waste-Bentonite Clay-Jute Fiber Composite Materials: Impact Strength and Density Analysis Thoriq Bintang Fadillah; Kriswanto; Kaleb Priyanto; Immanuel Eltian Sudjana
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15732

Abstract

This study evaluates composite materials' impact strength and density from recycled high-density polyethylene (HDPE) waste reinforced with woven jute fibers and filled with bentonite clay at varying volume fractions (2%, 4%, 6%, and 8%). The composites were fabricated using a hot press molding technique. Density was measured following ASTM D792, while impact strength was assessed using the unnotched Charpy method based on ISO 179. Results showed that increasing bentonite content raised the composite's density due to the higher specific gravity of the clay. Impact strength exhibited a non-linear behavior, peaking at 4% bentonite with a 13.5% increase compared to the 2% variant. However, further increases in clay content led to a significant drop in impact strength, primarily due to filler agglomeration and reduced matrix-fiber interfacial bonding, which resulted in brittle fracture modes. Macro-photographic analysis of fracture surfaces confirmed this trend, revealing ductile failure, fiber pullout at low clay contents, and sharp, brittle fractures at higher contents. These findings highlight the importance of optimizing filler content to balance density and mechanical performance, offering insights for developing sustainable composite materials for structural and industrial applications. Keywords: recycled HDPE, natural fiber composite, bentonite clay, impact strength, density
Effect of Eggshell Waste Filler Content on Impact Strength and Physical Properties of Jute Fiber Reinforced Recycled HDPE Composites Ikhsan Eka Pramudya; Kriswanto; Kaleb Kaleb Priyanto; Muhammad Eka Rizky Ramadhan
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15739

Abstract

This study investigates the influence of eggshell waste-derived calcium carbonate (CaCO₃) filler content on the impact strength and density characteristics of jute fiber reinforced recycled high-density polyethylene (r-HDPE) composites. The research addresses the dual challenge of plastic waste management and agricultural waste utilization by developing sustainable composite materials suitable for automotive applications. Eggshell waste was mechanically processed to produce CaCO₃ filler particles passing through 300-mesh screens, while r-HDPE was sized to pass through 50-mesh screens. Jute fibers in plain weave configuration were subjected to alkaline treatment using 5% NaOH solution to enhance fiber-matrix adhesion. Composite specimens were fabricated using compression molding technique with CaCO₃ filler content varied systematically at 0%, 2%, 4%, 6%, and 8% by volume fraction. Impact testing was conducted according to ISO 179 standards using Charpy impact testing, while density measurements followed ASTM D 792 procedures. Macroscopic failure analysis was performed through stereomicroscopic examination of fracture surfaces. The results revealed complex relationships between filler content and mechanical performance. The addition of 2% CaCO₃ produced marginal impact strength improvement of 0.5%, while higher filler loadings of 4%, 6%, and 8% resulted in progressive deterioration of 1.1%, 1.8%, and 1.9% respectively compared to the baseline composite. Density measurements showed systematic increases of 5.1%, 13.2%, 16.3%, and 23.2% for 2%, 4%, 6%, and 8% CaCO₃ content respectively, confirming successful filler incorporation. Macroscopic failure analysis revealed a transition from ductile to brittle fracture behavior with increasing filler content, characterized by reduced fiber pull-out lengths and cleaner fracture surfaces. The findings indicate that while eggshell-derived CaCO₃ offers environmental benefits through waste utilization, optimal mechanical performance requires careful control of filler content and surface modification strategies to achieve effective particle-matrix compatibility in sustainable composite systems
Production and Properties of Alternative Fuels from the Pyrolysis of Used Plastic Bags and Buckets Ida Bagus Alit; I Made Mara
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15903

Abstract

This study aims to examine the properties of liquid fuel produced from the pyrolysis of two types of plastic waste: plastic buckets and plastic bags. The pyrolysis method is used to convert plastic waste into fuel oil (BBM) at high temperatures in the absence of oxygen. Experimental results show that 0.736 to 0.863 kg of fuel oil can be obtained from 1 kg of raw material. The color of the resulting fuel oil is influenced by the original color of the plastic material, indicating an effect of the chemical composition on the final product. Physical analysis shows that the density and kinematic viscosity of the fuel oil from plastic buckets are slightly lower than those of the fuel oil from plastic bags. However, both have values close to the characteristics of gasoline. The calorific value of the fuel oil from both types of plastic waste is still lower than that of gasoline and diesel, but sufficiently high for use as an alternative fuel. The ash and lead content in the pyrolysis fuel also remains below the maximum allowable limits for motor vehicle use. Thus, the fuel produced from plastic waste pyrolysis has the potential to be an environmentally friendly and sustainable alternative energy source.
Production Process of Making Custom Part Rotary Housing on Milling Machines at PT. Anugrah Petrindo Moratama Johannes Pietra Simamora; Oleh; Tee Boy Jhonson Simamora
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.16406

Abstract

This internship was conducted at PT. Anugrah Petrindo Moratama, a company engaged in engineering and manufacturing. The purpose of this activity was to understand the production process of manufacturing a custom Rotary Housing part using lathe and milling machines. The methods applied included direct observation, primary data collection, and comparative analysis between theoretical knowledge and field practice. The main material used was Gray Cast Iron due to its suitable mechanical properties for Rotary Housing components. The production process consisted of client request handling, product design using software, raw material selection, engineering processes using lathe and milling machines, and quality control stages. The calculation results show that cutting speed and spindle rotation significantly affect production time; the higher the RPM, the shorter the machining duration. This internship provided practical experience for students to understand the real application of production process theory and broaden their knowledge of manufacturing industry operations.
Analysis of the Effect of Changes in Ignition Timing to Improve Engine Performance on a 155cc Automatic Motorcycle Muhammad Fikri Aprilyansyah; Aripin; Deri Teguh Santoso
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.16425

Abstract

This study aims to analyze the effect of using a Juken ECU with various settings on power, torque, fuel consumption, and specific fuel consumption on a motorcycle. Testing was conducted by comparing four conditions: the Standard ECU, the Juken ECU with standard settings, the Juken ECU with +2 settings, and the Juken ECU with -2 settings at speeds ranging from 30,000 to 70,000 mph.The test results showed that the highest power was achieved with the Juken ECU with -2 settings, with a maximum value of 10.07 hp at 70,000 mph. Meanwhile, the Juken ECU with -2 settings also achieved the highest torque of 9.19 Nm at the same speed. However, in terms of fuel efficiency, the Standard ECU demonstrated the lowest specific fuel consumption, indicating that this system is more efficient than the Juken ECU.Overall, it can be concluded that using the Juken ECU with -2 settings can improve engine performance in terms of power and torque, but at the same time, it also results in increased fuel consumption. The Standard ECU remains the most efficient choice for daily use that emphasizes fuel economy
Intergranular Corrosion Rate Analysis of UNS N06625 Overlay Material Based on ASTM G28-2024 Testing Adi Syahputra Purba; Mutia Amalia; Rona Cuana; Nur Fitria Pujo Leksonowati; Abdul Aziz Al Hakim Panjaitan
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.17259

Abstract

Intergranular corrosion is one of the degradation mechanisms that can reduce the reliability of nickel-based alloy materials in corrosive environments. UNS N06625 is well known for its excellent corrosion resistance due to the presence of alloying elements such as chromium, nickel, and molybdenum, which promote the formation of a stable passive layer. This study aims to determine the intergranular corrosion rate of UNS N06625 overlay material based on the ASTM G28-2024 Method A testing standard. Corrosion testing was conducted by immersing specimens in a corrosive solution at boiling temperature for 120 hours, and the corrosion rate was calculated using the mass loss method. The results indicate an intergranular corrosion rate of 0.454 mm/year, demonstrating excellent corrosion resistance. The low corrosion rate is associated with the stability of the microstructure and the effectiveness of the passive oxide layer in inhibiting corrosion processes. Therefore, UNS N06625 overlay material is considered suitable for applications in highly corrosive environments.
Effect of Automatic Robotic Clutch on Clutch Lining Wear Characteristics Based on Tribology Testing Billa Vandewa; Erwin Erwin; Didik Sugiyanto; Juan Pratama; Trisna Ardi Wiradinata
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.17283

Abstract

The development of semi-automatic clutch systems, such as Automatic Robotic Clutch (ARC), aims to improve driving comfort in manual transmissions. However, changes to the clutch pressing mechanism can affect slip, working temperature, and clutch pad wear rate, so a tribological evaluation is required to ensure the vehicle's durability and performance. This study aims to analyze the effect of ARC installation on the wear rate of manual four-wheeled vehicle clutch pads by measuring run-out, thickness, and keeling nail depth. Tests are carried out on manual vehicles before and after ARC installation. The clutch lining is measured using the indrunout dial based on run-out and rivet depth. The engine's RPM performance is analyzed through sensor readings. The data are compared to identify changes in the wear of the C mounting, indicating an increase in clutch lining wear. This study shows that ARC affects clutch working characteristics in manual vehicles by increasing clutch slip during certain phases, thereby accelerating clutch lining wear as measured by run-out and rivet depth. It has an impact on the stability of vehicle RPM performance. This research contributes to the field of automotive and clutch tribology by providing experimental evidence of the impact of ARC on clutch lining wear, serving as a reference for the development of a more reliable semi-automatic clutch system.
Design of Cassava Cutting Tool Based on Mechanical Calculation Analysis Wilarso; Aswin Domodite
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.17288

Abstract

This research focuses on the design, fabrication, and performance evaluation of a cassava and banana cutting machine prototype aimed at improving the uniformity of slice thickness and the efficiency of the chip production process. The design stages were carried out systematically using AutoCAD and SolidWorks software to produce geometric configurations and cutting mechanisms that suit the characteristics of the tuber and fruit materials. Next, the virtually validated design was realized through a fabrication process into a functional prototype. Machine performance testing was carried out using cassava test material with an average diameter of 50 mm. Each test condition was repeated five times (n = 5) to ensure data repeatability. The performance parameters analyzed included production rate (throughput) in kg/hour, slice thickness in millimeters which was statistically analyzed using the mean and standard deviation values, and electrical power consumption during machine operation. The test results showed that the machine was capable of producing an average throughput of 50 ± 3 kg/hour with a slice thickness of 2.0 ± 0.15 mm and a coefficient of variation of 7.5%, which indicates a good level of slice uniformity. Power consumption was recorded at 3.1 kW under standard operating conditions. Compared to manual cutting methods, the use of this machine reduced cutting time per kilogram of material by approximately 60%. Based on these results, it can be concluded that the developed prototype is effective in improving process efficiency and sliced ​​quality. Further research is recommended to optimize the material feed system and test the machine's performance on a wider variety of raw materials Keywords: Cutting machine; cassava; banana; slice uniformity; mechanical design

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