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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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A Case Study of Risk-Based Inspection Implementation in Diesel Fuel Distribution Pipelines
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.v8i2.25689

Abstract

Distribution pipes play an important role in the oil and gas industry, allowing fluids such as crude oil, natural gas, and processed products to move. X Company, an oil and gas company, uses these pipelines to transport diesel fuel from the refinery unit to storage tanks. Proper inspection and maintenance of this pipeline is critical to avoiding issues such as corrosion, cracking, and material failure, which can jeopardize safety, finances, the environment, social stability, legal compliance, and business continuity. This study evaluates a risk-based inspection methodology for ten thickness measurement locations on diesel fuel distribution pipelines using the API 581 standard. The procedure includes a literature review, data collection, assessment of remaining life, calculation of the probability and consequence of failure, risk profiling, and the development of an inspection plan. The results indicate that the pipelines have an average remaining life of 13.14 years. Nine thickness measurement locations were classified as 1C and one as 2C, placing them in the medium-risk category. Every three years, a re-inspection plan is proposed that includes both a 100% visual inspection and targeted non-destructive testing using ultrasonic thickness readings. This study demonstrates how risk-based inspection concepts can be used in practice to improve pipeline integrity inspection procedures. The findings include practical recommendations for increasing safety and operational reliability while reducing inspection costs and risks associated with diesel fuel distribution pipelines.
Design of Paper Foil and Laminating Machine as Lining Material for Paper Bags
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.v9i1.26117

Abstract

In order to enhance the contribution of MSMEs as a key driver of Indonesia’s economic growth, the development of small- to medium-scale production machines is essential. This is particularly important as MSMEs face increasing competition and more complex customer demands. This study aims to design and develop a simple production machine using CAD software and Autodesk Inventor to improve productivity and quality in the paper bag manufacturing process. Currently, production is carried out manually, resulting in limited capacity and product quality. The machine being designed serves to perform the paper gluing and rolling processes with foil lamination. The design integrates the gluing and rolling mechanisms into a single unit equipped with an automatic rotating system. This setup significantly reduces production time, thereby increasing both capacity and quality compared to the manual process. Simulation analysis of force, stress, and safety factor was carried out assuming the frame receives a load of 120 N, based on conditions close to reality. The results show a maximum Von Mises stress of 97.91 MPa and a minimum of 0 MPa. The maximum displacement is 0.5844 mm, and the minimum is 0 mm. The safety factor at the top frame section is 2.55 ul. Meanwhile, for testing under a 12 kg load, the results show a maximum Von Mises stress of 108.8 MPa, a displacement of 0.6488 mm, and a safety factor of 2.3 ul.
Design and Simulation of a 12-Cavity Injection Mold with Optimized Runner System for Efficient Production of Sample Cups
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.v8i2.26118

Abstract

Injection molding is widely used in large-scale manufacturing due to its efficiency in producing plastic products. One such product is the sample cup, used in the medical field for liquid sample storage. An inefficient runner system in injection molding can cause uneven material distribution, leading to defects and material waste. This study aims to simulate the injection molding process for a 12-cavity mold, optimizing the runner system and designing a three-plate mold for sample cup production. Product and mold designs were created using Autodesk Inventor Professional, and injection molding simulations were performed using Moldflow Plastic Insight to determine the optimal runner layout. The simulation results indicated that runner layout 1 was superior, with improved performance in terms of fill time (0.8028 s), pressure at switchover (85.93), sink index (0.4359%), volumetric shrinkage (10.50%), and cycle time (50 s). Based on these results, layout 1 was selected for the three-plate mold.
Development of Standard Test Specimens for Competency Improvement of Non-destructive Test (NDT) Personnel—Industrial Radiography
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.26290

Abstract

Test specimens made of low-carbon SS400 steel in the form of plates and pipes will be manufactured for use by certification and training institutions. Currently, test specimens in Indonesia are imported, resulting in higher operational costs. Therefore, the domestic fabrication of test specimens is conducted to address this issue and improve the competency of NDT personnel. Radiographic techniques are applied to evaluate defects and verify acceptance criteria. Plate specimens with a geometry of 350 mm x 200 mm and pipes with a diameter of 2 "(50.8 mm) were welded using SMAW (Shielded Metal Arc Welding). Radiographic examinations revealed porosity and incomplete penetration (IP) defects on the plate specimens and four types of weld discontinuities on the pipe specimens: porosity, IP, external undercut, and spatter. The resulting density follows the acceptance standard, namely 2.12 on the plates and 1.91 on the pipes. Future evaluation using digital radiography methods such as computed radiography (CR) and digital detector arrays (DDA) is required to align with current technological advancements.
Analysis of Manufacturing Process on a Corn Husker, Corn Sheller, and Corn Cob Crusher Machine Method Screw Using Motor 0.5 HP
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.v9i1.26869

Abstract

Corn is one of the staple foods utilized by humans as a food source and for other products; the planting, harvesting, and processing of corn significantly affect its quality. Generally, the problem faced by corn farmers is during the harvest season, where corn that is ready for harvest requires a very complicated process to obtain corn seeds. Generally, farmers perform the tasks of husking and shelling corn using their hands or makeshift tools. From this complex process, this research was conducted with the aim of designing a corn husker, corn sheller, and corn cob crusher machine. The process used in this machine is based on the principle of transfer using a screw conveyor that will move from the peeling process to the shelling process and finally to the corn cob crushing process. This research uses the method of manufacturing process analysis of several components that make up the machine and the calculation of the production cost of goods manufactured. From the results of the analysis of the research on the manufacture of the peeling machine, corn sheller, and corn cob crusher, the production cost of goods manufactured was obtained at Rp. 4,066,919, and the machine processing time was 11.4 hours
Effect of Environmental Moisture on Surface Roughness of FDM and SLA Fabricated Components
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.v9i1.27238

Abstract

This study aims to analyze the surface characteristics and moisture contents of three different 3D printed materials, namely Polylactic Acid (PLA) filament, bio-based resin, and standard translucent resin, produced using two distinct manufacturing processes: Fused Deposition Modelling (FDM) for filament materials and Stereolithography (SLA) for resin material. The moisture content was measured using a Moisture Analyzer, and surface characteristics were examined by capturing images through a digital microscope. The results of the moisture content measurement indicated that all three materials exhibited hydrophobic properties with low water content under similar treatments. Among the materials, bio-based resin demonstrated the highest moisture content of 1.53%, followed by translucent resin with 1.26%, and PLA filament with 1.11%. Furthermore, a correlation between applied temperature and moisture content was observed, with translucent resin showing the most stable results, consistently increasing with higher temperatures. In contrast, bio-based resin and PLA filament exhibited unstable behaviours. Surface observation using surface roughness and the digital microscope revealed distinct patterns for the two manufacturing processes. For resin specimens, defects on the surface were evident at lower temperatures and increased with rising temperature. In contrast, PLA filament demonstrated a different surface change pattern, characterized by material melting, leading to a smoother surface. In conclusion, this study sheds light on the surface characteristics and moisture content of 3D printed materials produced through different manufacturing processes. The findings highlight the importance of material selection and processing parameters in achieving desired material properties for various applications in 3D printing.
CFD Study on Wire Mesh Inserts Enhancing Heat Transfer in Double Pipe Heat Exchanger
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.v9i1.27332

Abstract

The efficiency of heat transfer in conventional double pipe heat exchangers (DPHE) was often limited by low heat transfer coefficients. This posed a challenge for compact-scale industrial applications requiring enhanced thermal performance without increasing system dimensions. One potential solution was the insertion of wire mesh inside the pipe to induce local turbulence and intensify forced convection. This study was conducted numerically using Computational Fluid Dynamics (CFD) in ANSYS Fluent 2024 R2. The DPHE consisted of concentric copper pipes with a length of 1240 mm, inner pipe diameter of 26/34 mm, and outer pipe diameter of 68/76 mm. Water was used as the working fluid in counterflow mode, with inlet hot water at 70 °C (Re 4000–16000) and cold water at 31 °C (Re 2000). The parameters varied were wire mesh angle (30°, 60°, 90°), wire spacing (3 mm, 4 mm, 5 mm), and mesh spacing (4 cm, 5 cm, 6 cm), arranged using an L9 orthogonal array. Three-way ANOVA and Tukey HSD test were applied to identify significant effects. The configuration of 30°, 3 mm, and 4 cm was found to be the most optimal, yielding a 34.55% increase in heat transfer compared to the plain DPHE.
Analysis of Carbon Emission Calculation on Converted Electric Vehicles to Determine Emission Reduction Potential: Review
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.27875

Abstract

The transportation sector is a major contributor to carbon emissions in Indonesia, mainly due to the widespread use of fossil fuel-powered vehicles. To lessen these environmental impacts, converting conventional motor vehicles into electric vehicles is seen as an effective and cost-efficient solution. This study aims to examine the potential for reducing carbon emissions through the conversion to electric cars by reviewing national journals and conducting simple simulations. The research used a systematic literature review approach, comparing annual emissions of fossil fuel vehicles (Internal Combustion Engine/ICE) and electric vehicles (EV) based on energy consumption and yearly mileage. Results indicate that the potential for emission reduction ranges from 0.0036% to over 85%, with an average of around 37%, with the highest reductions observed in scenarios where renewable energy sources dominate. Simulations demonstrate that vehicle conversion can cut emissions by approximately 29% for an annual mileage of 10,000 km. The success of emission reduction depends heavily on the composition of the national electricity mix, which is still largely dominated by PLTU. Increasing the renewable-energy share to 50% could significantly boost emission reductions.
PV Array Simulation with Single Diode Equivalent Circuit Considering Series and Shunt Resistance
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.29291

Abstract

This study analyzes the output characteristics of solar panels using three modeling approaches, namely the Single Diode Model (SDM), the Ideal Single Diode Model (ISDM), and the Newton–Raphson (NR) method, and compares them with the reference model from the MATLAB library. The performance of each model is tested under various irradiation and temperature conditions. The results indicate that the ISDM model, implemented using MATLAB Simulink blocks, exhibits noticeable deviation from reference due to the neglect of shunt resistance (R_sh) and series resistance (R_s) effects. The SDM model with the Matlab Simulink block provides better accuracy but still shows slight discrepancies caused by algebraic loops during simulation. Among the three methods, the Newton–Raphson method yields results that match the reference most closely, demonstrating minimal error at the maximum power point. This confirms that the NR method more accurately represents PV characteristics and behavior compared to the SDM and ISDM. Therefore, this method can be relied upon for PV system simulation and optimization applications under varying operating conditions.
Thermal Behavior of Agricultural Waste in Microwave-assisted Pyrolysis: A Focus on Temperature Parameters
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.29302

Abstract

Temperature is a crucial parameter in microwave-assisted pyrolysis, as it serves as a basis for evaluating the thermal treatment of a material. This study aims to assess temperature-related parameters and identify the optimal mixture composition for the microwave-assisted pyrolysis of agricultural waste, specifically corn cob, groundnut shell, and rice husk, combined with charcoal. The research employed thermogravimetric analysis (TGA), with agricultural waste mixed with a microwave absorber in the form of charcoal at various composition ratios: 100:0, 75:25, 50:50, 25:75, and 0:100. The results indicate that the composition of feedstock significantly affects temperature parameters. The addition of charcoal was found to increase the maximum temperature and heating rate while simultaneously reducing energy consumption. For all tested agricultural waste, higher charcoal compositions at ratios of 75:25, 50:50, and 25:75 resulted in substantial improvements. Maximum temperature increased by up to 230%, heating rate by up to 497.90%, and energy consumption decreased by up to 80.45% compared to pure agricultural waste biomass. This indicates that 75:25 mixtures of corn cobs, groundnuts, and rice husks with charcoal can be recommended for the pyrolysis process, as they are capable of reaching the pyrolysis temperature range of approximately 400°C–800°C.

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