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JMPM (Jurnal Material dan Proses Manufaktur)
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 25803271     EISSN : 26565897     DOI : 10.18196/jmpm
Core Subject : Engineering,
Engineering Mechanical Engineering
Jurnal Material DAN Proses Manufaktur focuses on the research and research review in the field of engineering material and manufacturing processes. The journal covers various themes namely Design Engineering, Process Optimization, Process Problem Solving, Manufacturing Methods, Process Automation, Material research and investigation, Advanced Materials, Nanomaterials, Mechanical solid and fluid, Energy Harvesting and Renewable Energy.
Arjuna Subject : -
Articles 275 Documents
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Design and Analysis of Finger Prosthetics Using Finite Element Methods
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 8 No. 1 (2024): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v8i1.22283

Abstract

According to the Central Statistics Agency (BPS), the total number of physically disabled people in Indonesia until 2020 reached 22.5 million people. However, only around 18% use assistive devices. 3D printing technology in the world of health can be used to print prosthetic materials. However, many previous functional prosthetic designs were still fabricated conventionally and did not pay attention to prosthetic standards and quality. One computational testing method that can be used to test prosthetic strength is the finite element method. The aim of this research is to produce a functional finger prosthetic design that has tested its strength through computational simulations using the finite element method to minimize prosthetic production costs so that the resulting prosthetics are more affordable.The tools needed in this research are a ruler for finger measurements and a computer or laptop with Fusion 360 software.Based on the analysis results, it shows that this model is able to withstand loads of up to 100 N with deformation, stress and safety factor values produced respectively of 0.016 mm, 27,605 MPa and 7.49.
Optimization and Testing of Young Coconut Peeling Machines for Productivity Enhancement
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 1 (2025): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research aims to develop and optimize a machine for peeling young coconut skin, increasing production efficiency and improving the quality of peeling results. The research background is based on the need for more efficient tools compared to manual methods, which are only capable of peeling around 45 coconuts per hour. Research methods include designing, assembling, and testing machines with various knife models and electric motors. The design process uses Autodesk Inventor software, and testing is carried out by measuring the stripping time and the quality of the stripping results. This study analyzes the impact of different knife models and motor power variations on the efficiency of young coconut peeling, using a machine with a 1/2 HP electric motor at 1400 RPM capable of peeling 68 coconuts per hour, achieving a 51% increase in production compared to manual methods not only increases time and energy efficiency but also produces more consistent products. The conclusion shows that this young coconut skin peeling machine is able to increase productivity and the quality of peeling results, providing an innovative solution in the young coconut processing industry. This research suggests the use of peeling machines to increase efficiency and quality in processing young coconuts, optimize production, and reduce the risk of work injuries that often occur with manual methods.
The Effect of Banana Frond Waste Fibers Compared to Glass Fibers on The Mechanical Properties of Composites
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 1 (2025): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study investigates the mechanical properties of composites reinforced with banana frond waste fibers compared to those reinforced with traditional glass fibers. The increasing environmental concerns and the need for sustainable materials have driven the exploration of natural fibers as viable alternatives to synthetic fibers in composite materials. Banana frond waste, a byproduct of banana cultivation, offers a renewable and biodegradable option for composite reinforcement.Composites were fabricated using both banana frond waste fibers and glass fibers, and their mechanical properties, including tensile strength, bending strength, and impact resistance, were evaluated and compared. The results indicated that while glass fiber composites exhibited higher overall mechanical performance, banana frond waste fiber composites showed competitive properties, particularly in terms of impact resistance and specific strength. The natural fibers demonstrated adequate bonding with the polymer matrix, contributing to the composite's overall integrity.Moreover, the use of banana frond waste fibers significantly reduced the composite's environmental footprint, making them a promising alternative for various applications where moderate mechanical performance is sufficient. The study highlights the potential of banana frond waste fibers as a sustainable reinforcement material, encouraging further research and development in this area to optimize their mechanical properties and broaden their application scope.
Improving the Bending Quality of SUS 201 1B Material by Optimization of the Processing Parameters using Taguchi Method
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 8 No. 2 (2024): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v8i2.23439

Abstract

Sheet metal bending was a type of sheet metal forming process that produced sheet metal bending according to a certain angle and length using a die. The formed process caused elastic and plastic deformation, resulting in springback and sheet metal elongation. The research analysed used the Taguchi method to find the best arrangement of bending parameters that produced the best bending angle and side length. The bending parameters selected in the study were material cutting orientation factor, punch velocity, and holding time. The ANOVA method would follow the tested results to determine the contribution of each parameter tested. The results stated that the material cutting orientation 0-degree, punched velocity of 10 mm/s, and holding time of 5 seconds was the best parameter arrangement that produced the best bending angle with the smallest springback angle. The bending parameter arrangement for the best-bending side length was a material cutting orientation of 0 degrees, pressing speed of 15 mm/s, and holding time of 5 sec, it minimize springback, significantly optimizing the deformation process for SUS 201 1B materials. The studied results concluded that the material cutting orientation factor had the largest contribution to the angle and length of the bending side, with a percentage contribution of 98.105% and 98.499%.
Performance of the Turbocharged Engine Toyota Raize using Pertamax 92 and Pertamax Green 95
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 8 No. 2 (2024): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v8i2.23720

Abstract

The automotive industry has experienced rapid technological advances in the development of more developed and efficient vehicles. An example is the Toyota Raize, which is equipped with a 3-cylinder turbocharged engine. Along with technological advances, issues have arisen regarding the use of optimal fuel to maintain engine performance. In the Indonesian market, Pertamina fuel is the main choice for consumers such as Pertamax 92 and Pertamax Green 95. The difference in octane values between the two raises questions about their impact on the performance of the Toyota Raize engine with a Turbocharger. A study was conducted on what fuel is better to use in a 3-cylinder turbocharged engine at varying engine speeds using experimental and theoretical research methods. The results showed that at engine speed 6000 RPM, the torque produced by Pertamax 92 reaches 130.8 Nm, while Pertamax Green 95 reaches 145.1 Nm. At the same speed, Engine power produced by Pertamax 92 reaches 110.2 HP, while Pertamax Green 95 records 122.2 HP. At low engine speed, Pertamax Green 95 is more efficient in fuel consumption whereas Pertamax 92 is more efficient at high speed. Pertamax Green 95 also produces a lower average CO2 concentration compared to Pertamax 92. In conclusion, Pertamax Green 95 fuel is more consistent and efficient and provides more optimal performance compared to Pertamax 92.
Analysis Index of Retained Strenght on AC-WC Asphalt Mixture with the Addition of Cigarette Filter Waste as an Alternative for Asphalt Modification
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 8 No. 2 (2024): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v8i2.23832

Abstract

In order to provide an alternative asphalt mixture that is more durable, various efforts have been made to improve the quality of asphalt, therefore research is needed on polymer modified asphalt by replacing some of the asphalt with cigarette filter waste. In this study, cigarette filter waste was substituted into asphalt with proportions of 2%, 5%, and 8%. The purpose of this study was to determine the percentage of cigarette filter waste that affects the AC-WC mixture based on marshall characteristics and residual stability. The optimum asphalt content (KAO) used was 5.1%, with the results showing that the addition of cigarette filter waste affected the marshall characteristic values, namely the specific gravity value, Voids Filled with Asphalt (VFA), and the highest stability was at a variation of 2%, while the Voids in Mix (VIM), Void in Mineral Aggregate (VMA), and the highest flow. were at a variation of 8%. The residual stability index test showed that water affected the durability of the AC-WC mixture, as evidenced by the highest value in the 24-hour immersion variation with a cigarette filter content of 2% which decreased with increasing immersion time. The addition of cigarette filter waste into the AC-WC mixture has met the Bina Marga Specifications in the Marshall characteristic test, but the change in the residual stability index was only at a soaking time of 24 hours, while for other periods it did not comply with the Bina Marga specifications.
The Influence of Sea Water Immersion on the Mechanical Properties and Structure of Carbon Fiber/Polyester-PEG Composite Materials
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 1 (2025): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i1.24448

Abstract

Structural batteries are a crucial solution in dealing with issues related to vehicle electrification to achieve energy sustainability in the future. However, the development of structural battery technology for electric-powered ships is still very limited. In particular, there are limitations in evaluating the mechanical performance of carbon fiber/polyester-PEG based composite materials for structural battery applications in electrically powered vessels. The main focus of this research is to fabricate carbon fiber/polyester-PEG to further observe the performance of its mechanical properties and structure when interacting with sea water. The value of the addition of polyethylene glycol (PEG) to the fabrication carried out was varied by 0%, 10%, and 25%. The results show that addition of 10% PEG produces a composite with the highest tensile strength, increasing the toughness of the polyester material. However, all samples experienced a decrease in tensile strength after immersion due to decreased bond performance between the fibers and seawater. The addition of 25% PEG resulted in a significant decrease in mechanical properties because high levels of PEG content made the sample easily brittle and destroyed when interacting with seawater. This research can provide initial studies on the development of carbon fiber/polyester-PEG composite materials that can be used as structural battery building materials for future electric boat applications.
Design Improvement of Mold Bracket for Quarter Trim to Reduce Ejector Mark Defects
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 1 (2025): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i1.24939

Abstract

This study focuses on improving the quarter trim bracket mold in the mold making division to mitigate the risk of ejector marks, which were identified through long-term analysis. The author redesigned the mold by considering the ejector layout, cooling layout, clamping force calculations, and number of pressure plates, to ensure the product is free from defects. The addition of an ejector pin in the rib area is proposed as a solution to minimize this problem. The quarter trim bracket mold is designed using two pressure plates measuring 30 x 60 mm and four measuring 30 x 80 mm, with a total pressure plate area reaching 13,200 mm². Based on calculations, this part requires a clamping force of 14.5 tons to be produced on a 30 ton capacity injection machine. This clamping force is important to keep the mold tightly closed during the production process, and is calculated based on the cavity pressure in the mold and the shot area. All mold designs are created following company standards to ensure accuracy of sizes and calculations. This research is expected to improve production quality and operational efficiency.
Analysis of The Failure in Crude Oil Transmission Pipeline Segment BS CLM–BS CMS PT PQR
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 1 (2025): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i1.25616

Abstract

The pipeline refers to the API 5L Grade B standard, with a diameter of 8 inches and a length of 212 km. The design life of the pipeline is 20 years. However, after being in operation, it experienced two leak incidents in the same segment within one year. This condition disrupted the oil delivery from PT PQR's field. Therefore, a study is needed to determine the causes of the pipeline's failure before reaching its design life. The investigation involved visual observation of the pipeline samples, pipe thickness testing, chemical composition testing, and microstructural analysis of the leakage area. Additionally, characterization tests were conducted on the elements present in the corrosion product deposits. Process fluid testing was also performed to determine the anion, cation, and scale formation tendency based on Valone & Skillern's guidelines. The results showed visual thinning on the inner surface of the pipeline at the 6 o'clock position. Chemical composition testing revealed no differences from the standard API 5L Grade B composition. SEM analysis in the leakage area identified corrosion morphology caused by dissolved CO2. XRD analysis of the corrosion deposits indicated the presence of siderite (Fe2CO3), hematite (Fe3O4), and iron (Fe) compounds. The pipeline failure occurred due to the presence of corrosive substances, specifically produced water. This condition caused the pipe surface at the 6 o'clock position to be exposed to produced water, initiating the formation of hydrogen ions (H+) and bicarbonate ions (HCO3-).
Low-Cost Production of Ca(OH)2 Nanopowder Utilizing Chicken Eggshell as A Single Source
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 1 (2025): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i1.25634

Abstract

This article reports utilization of chicken eggshell waste as a single source for producing Ca(OH)2 nanopowder by ultrasonic-assisted precipitation method. The effect of heating treatment on the structure, morphology, and functional groups of Ca(OH)2 was investigated. Chicken eggshell waste was calcined to obtain CaO powder and then converted into CaCl2 by dissolving it in an HCl solution. Synthesis of Ca(OH)2 nanopowder was carried out by gradually dropped the NaOH solution into the CaCl2 solution while being irradiated with an ultrasonic wave. The heating treatment was carried out at 100oC, 200oC, and 400oC, respectively. Ca(OH)2 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and infrared spectroscopy. X-ray diffraction analysis showed that the Ca(OH)2 samples had a single crystal phase, and the crystal size varied with different heating temperature. Surface morphology showed the fine microstructure of Ca(OH)2 samples, finer as temperature increased. FTIR analysis showed that the functional groups appeared which indicated that the chemical structure of the Ca(OH)2 compound had been formed.

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