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All Journal Media Teknik Sipil Rotasi Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Jurnal Teknik Mesin Indonesia Journal of Industrial Engineering Agro Bali: Agricultural Journal Applied Research and Smart Technology (ARSTech) METAL : Jurnal Sistem Mekanik dan Termal Majalah Teknik Mesin
Sutisna, Nanang Ali
Universitas Presiden
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Analisis desain stamping die menggunakan FTI forming suite Nanang Ali Sutisna; Vicky Gufron Afandi
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.509

Abstract

This study was conducted on stamping die design for one of the car body parts using the FTI Forming Suite software. In general, the design process of existing stamping dies in the observed companies involves seven to ten trials before obtaining an acceptable die, which consequently increases the cost of the die. By using the software, it is expected that the number of trials will be reduced because the design is analyzed first to identify unwanted defects in the stamping process, such as wrinkles, splits, and springbacks. The study begins by comparing the stamped parts with the design. Using a 3D scanner, the geometry of the parts is obtained and compared to a original 3D CAD model to check for deviations of the parts from the original design. Comparison between the stamped parts and the original design shows discrepancies. This is most likely because the design has been modified to prevent stamping defects. Furthermore, the original design is simulated by applying a blank holder force of 109.7 kN. The first simulation on the original design showed that the thickness strain was -14.4% and had a strong wrinkling tendency, therefore the modified design was then simulated again on this modified part design. Modifications mainly focused on the essential corner radius, as well as on the blank holder force to 129.2 kN to prevent wrinkling and reduce springback. The second simulation produces good formability as shown by the forming limit diagram (FLD), safety zone, and better springback, even though the minimum thickness strain increases to -19.2%. Thus, by using simulation software, the correct die geometry can be obtained prior to die making to avoid unnecessary die modification costs during the trial run. In addition, the number of trials can be minimized so that the lead time for stamping dies production is shortened.
Pengembangan Mesin 3D Printing Sebagai Alternatif Pembangunan Rumah Yang Lebih Efisien: Pengembangan Mesin 3D Printing Sebagai Alternatif Pembangunan Rumah Yang Lebih Efisien riyanto adji; Nanang Ali Sutisna; Wan Sen Tjong
Media Teknik Sipil Vol. 19 No. 2 (2021): Agustus 2021
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

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

Abstract

Technological advances will always experience very fast changes, especially in 3D printing technology which is currently acceptable in various industrial worlds, the presence of 3D printing machines really helps humans in visualizing an idea and the results of their thoughts into a very profitable replica. The world of construction has not been fully touched by 3D printing technology, and only a few countries have made it, one of which is the People's Republic of China, which in 2014 succeeded in building a house using a 3D printing machine, with a house size of 40 m2 and 5 floors high. The advantages of building a house with a 3D printing machine include saving labor, saving time in house construction because the construction of a house is determined by the type of concrete and the machine as the main tool, besides that the construction waste generated can be minimized because there is no need to use scaffolding or other tools. the material that is installed is definitely installed neatly because it is arranged in layers. The use of this 3D printing machine will be very useful in Indonesia because it takes into account the high level of population, and the need for housing will be directly proportional to population growth.
Investigation of heat treatment strategies for improvement of production capacity of coin stamping dies Sutisna, Nanang Ali; Permana, Fahyudha
Applied Research and Smart Technology (ARSTech) Vol. 2 No. 2 (2021): Applied Research and Smart Technology
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/arstech.v2i2.405

Abstract

This paper presents a study on the production capacity of stamping dies for minting coins under different heat treatment processes, particularly austenite temperatures, using a vacuum furnace. In the study, the specimen material was made from Bohler K340 steel. The first heat treatment strategy included heating the specimens to a stable austenite temperature at 1080°C, then holding for 120 minutes and cooling rapidly with gas quenching media with a pressure of 5 bar. Tempered treatment was performed at 500°C. Another strategy was similar to the first one, except the heating temperature at 1060°C and double tempering at 575°C. After the heat treatment process, microstructure observation and hardness testing were carried out. Finally, the production of the die capacity testing on the coining machine was conducted. The results of the specimen surface photographs of the two heat treatment strategies show a significant difference in the microstructure, similarly with the hardness value obtained from single tempering is 61.98 HRC and from double tempering is 57.94 HRC. The production capacity test result indicates that the average capacity of first and second dies are 101,250 coins and 171,150 coins, respectively. It means that the second dies exceed the minimum standard production capacity of dies as determined by the Quality Control department, which is 150,000 coins.
CFD ANALYSIS OF OFFSHORE HAWT BASED ON WIND SPEED PROFILE AT 50 METERS ALTITUDE IN THE SOUTHERN WATERS OF UJUNG PANDANG, SOUTH SULAWESI Sutisna, Nanang Ali; Ritonga, Yehezkiel Kusmadi
Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Vol 9, No 2 (2024): Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mecha
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jtmm.v9i2.5534

Abstract

Offshore wind turbines have many advantages over onshore wind turbines, with better wind speeds, fewer spatial constraints, and decreased visual and noise effects in densely populated areas. Indonesia's onshore wind energy potential for wind speeds exceeding 4.0 m/s is 60.65 GW. Moreover, Indonesia's offshore wind energy ability for wind speeds exceeding 6.0 m/s is 94.23 GW. Consequently, wind speeds in offshore regions are more promising than onshore areas, which can notably enhance renewable electricity generation and reduce the usage of fossil fuels. This research is conducted by modeling the 3D HAWT design in 2 domains, Stationary and Rotational, which will be combined in one interface. The simulation results indicate a significant increase in turbine performance parameters with increasing wind speed. It also successfully modeled the interaction between wind flow and the turbine, as shown in the velocity contours that display higher wind speed distribution at the blade tips and in the pressure contours that show higher pressure distribution on the front side of the blades and on the side of the blades relative to the direction of rotation
CFD Analysis Of Wind Turbine For 10 MW Electrical Power Generator In East Nusa Tenggara Sutisna, Nanang Ali
Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Vol 8, No 2 (2023): Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mecha
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jtmm.v8i2.4787

Abstract

Electrical energy has a vital role in daily human activities. The energy sources currently used in a generation are non-renewable energy sources. Wind energy is a renewable energy source that can be utilized as mechanical or electrical energy through a conversion called the Wind Energy Conversion System. In wind power plants, a somewhat important component is a wind turbine; the wind will drive the turbine and generate electricity from the generator. This study analyzed the suitability of turbine designs to be applied to wind power plants in East Nusa Tenggara, especially in three areas with a reasonably high wind potential compared to the surrounding area. Selection of appropriate wind turbine for electrical power generation in East Nusa Tenggara is the first phase of the study, it compared two wind turbine designs, namely Horizontal Axis Wind Turbine (HAWT) and Vertical Axis Wind Turbine (VAWT). Followed by analyzing the performance of the selected turbine using secondary data and analysis software, namely Ansys, to determine the torque generated by the wind turbine under study. The simulation results showed that the Horizontal Axis Wind Turbine produced power of 259.491 kW at a wind speed of 5.86 m/s and 271.447 kW at a wind speed of 6.13 m/s. Based on the results, the Horizontal Axis Wind Turbine needed for generating 10 MW is 56 units.
Experimental and Computational Analysis of UHMWPE-Based Multi-Layered Bulletproof Vests Under 9mm Projectiles Impact Timotius, Hizkia; Sastranegara, Azhari; Hernawan, Rendi; Sutisna, Nanang Ali; Anggraini, Lydia
METAL: Jurnal Sistem Mekanik dan Termal Vol. 9 No. 1 (2025): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.9.1.1-13.2025

Abstract

This study investigates the ballistic performance and energy absorption of multi-layered UHMWPE bulletproof vests against 9mm projectiles using experiments and finite element simulations (LS-DYNA). Two configurations were analyzed: a conventional structure and a sandwich-layered design incorporating UHMWPE, titanium (Ti6Al4V), and PVC. Ballistic tests, conducted per NIJ Level IIIA standards, were validated through simulations. The sandwich-layered vest exhibited superior energy dissipation, achieving BFS values of 12.03 mm (experiment) and 12.36 mm (simulation), effectively reducing blunt trauma risk. The multi-material approach enhanced penetration resistance and impact force distribution, while numerical models closely matched experimental findings, confirming reliability. Results demonstrate the feasibility of lightweight, high-performance ballistic armor. Future work will explore material optimization, configuration refinements, and testing with higher-caliber projectiles for broader applications.
COMPARATIVE ANALYSIS OF NOISE, EMISSION, AND PERFORMANCE OF SHIJIRO RACING EXHAUST WITH STANDARD EXHAUST ON A 2020 VESPA SPRINT 150 I-GET Sutisna, Nanang Ali; Ramadhan, Ibnu Abil
ROTASI Vol 27, No 2 (2025): VOLUME 27, NOMOR 2, JULI 2025
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.27.2.49-63

Abstract

This article presents a comprehensive comparative study of the standard and Shijiro Standard Racing exhaust systems on a 2020 Vespa Sprint 150 i-GET. This study aims to evaluate the efficacy of the exhaust system. The research objectives include a comparison of motorcycle performance, noise production and exhaust emissions, with adjustments made in accordance with Indonesian laws and regulations. The study also examines the airflow of the exhaust gas using Computational Fluid Dynamics (CFD) simulations. Testing procedures were conducted on the 2020 Vespa Sprint 150 i-GET, utilizing both standard and racing exhaust systems. These tests included performance, noise, and emission tests, conducted using a dynamometer, decibel meter, and gas analyzer, respectively. The data collected from these tests were analyzed to provide a comprehensive comparison between the standard and racing exhaust systems. The result is that even though it makes a louder sound, the racing exhaust still meets noise regulations in Indonesia. Both exhaust types met emission standards. The performance results revealed that standard exhausts outperformed in horsepower, while racing exhausts excelled in torque. The study also involved the use of reverse engineering to analyze the airflow in the exhaust and obtain design, dimension, and size information. The CFD simulations confirmed the influence of exhaust construction on sound, performance, and emissions. This research provides valuable insights into the performance of standard and Shijiro standard racing exhaust systems, contributing to the body of knowledge in this field. 
Analysis Of The Influence Of Spindle Speed And Feed Rate On The Surface Quality Of The CNC Lathe Machining Process Using SS400 Material With Taguchi Method Sutisna, Nanang Ali; Al Grage, Fathir Fajaryanto
ROTASI Vol 27, No 3 (2025): VOLUME 27, NOMOR 3, OKTOBER 2025
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.27.3.14-21

Abstract

The CNC lathe machining process is one of the choices in the manufacturing industry. The CNC lathe machining process usually makes machine components that are either flat or cylindrical. This process has a principle, namely a process of forming the outer and inner surfaces of the material by rotating the workpiece and then meeting it with a cutting tool with an axis parallel to the workpiece. A CNC lathe is a machine that can move a cutting tool by receiving command data and then processing it. This study will show the effect of variations in spindle rotation speed and also variations in feed rate on the CNC Lathe Liouy Hsing 450 machine on the surface quality of the workpiece. In this study, SS400 steel and WNMG-type cutting tools were used as fixed variables, with variations in spindle speed of 800, 1000, and 1200 rev/min and feed rates of 0.1, 0.2, and 0.3 mm/min. The methods that will be used are experiments and statistics, then data collection will be carried out using observation and documentation methods. The data that has been obtained will be processed using Microsoft Excel. This study concluded that feed rate has a greater influence than spindle speed, and the fourth experiment at a spindle speed variation of 1000 rev/min and a feed rate of 0.1 mm/min had the smoothest surface roughness value of 0.487µm.
DESIGN AND CFD ANALYSIS OF 1 KW PICO HYDROPOWER SIMULATOR WITH CENTRIFUGAL WATER PUMP AND FRANCIS TURBINE Sutisna, Nanang Ali; Aditama, Fauzan Yasa
Media Mesin: Majalah Teknik Mesin Vol. 26 No. 2 (2025)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v26i2.10390

Abstract

Simulation is essential for a design study. This article illustrates the result of a research aimed to design andbuild a Pico Hydro Generator simulation system using a water pump as a source of water flow. Pico HydroGenerator is a small-scale power generation technology that utilizes water energy as a renewable energy resource.Through this simulation system, the design and testing of the Pico Hydropower simulator design can be carriedout to determine the efficiency value of the design. The planning process begins by determining the specificationsof the water turbine to be used, including water discharge, headwater, and the required capacity. Based on thesedata, it is possible to select the type of water pump that is suitable for the needs of the turbine. Then the design ofPico Hydropower components such as turbines, generators, water tanks, water channels, and system panels isdesigned. The design process uses CAD (Computer Aided Design) software to design parts and assemblies on thesimulator. Then the design performance will be analyzed using Computational Fluid Dynamic (CFD) software.The final result of this study is a Pico Hydropower simulator design that has been optimized and can be simulatedby using a water pump as a flow source. This simulation system can allow research and development in the formof learning tools for students to understand how Pico Hydro power plants work and how to calculate theirefficiency.
Co-Authors Aditama, Fauzan Yasa Al Grage, Fathir Fajaryanto Aldhito Hardianto Amin, Grace Budi Sutrisno Farrand, Michael Quinn Filda Rahmiati Harist Fauzi Hariz fauzi Hernawan, Rendi Lydia Anggraini M. Fajar Aulia Ansela Akbar Muhammad Irfan Satria Muhammad Munajad Permana, Fahyudha Rahman Hakim Rakha Amrillah Fattah Ramadhan, Ibnu Abil Reza Alfarisi Firmansyah Ritonga, Yehezkiel Kusmadi Riyanto Adji Sapto Agus Nowoasto Sastranegara, Azhari Timotius, Hizkia Tjong Wan Sen Vicky Gufron Afandi Zairullah Azhar