Article Per Year (5 Year)
p-Index From 2021 - 2026
1.203
P-Index
This Author published in this journals
All Journal Civil Engineering Journal Mechanical Engineering for Society and Industry
Eko Prasetya Budiana
Department Of Mechanical Engineering Universitas Sebelas Maret
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
Load Capacity and Bending Strength of Double-Acting Friction Stir Welded AA6061 Hollow Panels Nurul Muhayat; Muhammad Budi Utama; Ericha Dwi Wahyu Syah Putri; Eko Prasetya Budiana; Aditya Rio Prabowo; Yohanes P. D. S. Depari; . Triyono
Civil Engineering Journal Vol 10, No 8 (2024): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-08-018

Abstract

Aluminum alloy hollow panels are essential components in both civil and mechanical structures, such as building floors or large vehicle platforms. They enhance rigidity while staying lightweight and conserving material volume. In its application, this panel must be joined using welding methods. One common issue encountered in aluminum welding is the formation of porosity defects. Solid-state welding methods like Friction Stir Welding (FSW) can be a solution to address this problem. The FSW joining process on hollow panels cannot be completed in one welding operation due to their thickness. The FSW process must be performed on both surfaces, which requires a relatively long time. Therefore, FSW needs to be developed into a Double-acting FSW that utilizes two tools simultaneously. These two tools introduce two sources of heat input, pressing force, and friction-stirring, resulting in a novel response that needs further research. This study delves into the impact of welding speed variations in Double-Acting FSW on the load capacity and bending strength of AA 6061 hollow panel joints. Welding speeds of 20, 30, and 40 mm/min were tested alongside rotational speed (1500 rpm), tilt angle (2°), and shoulder diameter (24 mm). It was discovered that reducing welding speed enhances both load capacity and bending strength. Notably, specimens welded at 20 mm/min exhibited a load capacity of 15.61 kN and bending strength of 52 MPa, highlighting the potential of slower speeds for superior weld performance. Doi: 10.28991/CEJ-2024-010-08-018 Full Text: PDF
Temperature and material flow in one-step double-acting friction stir welding process of aluminum alloy: Modeling and experimental Eko Prasetya Budiana; Sekar Gading Happy Hapsari; Essam R. I. Mahmoud; Triyono Triyono
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12987

Abstract

Aluminum, known for its lower density compared to steel, is widely used in various applications. Welding is often required to form aluminum into technical structures. However, when fusion welding is used, it can lead to porosity in the weld. This occurs due to the significant difference in hydrogen gas solubility between liquid and solid aluminum, which traps hydrogen gas within the weld metal. Friction Stir Welding (FSW), a solid-state welding technique, has been proven to minimize porosity. However, for thick structures, FSW poses challenges, as welding must be done on both sides, increasing the welding time. To overcome this limitation, FSW has been modified into a one-step double-side FSW process, where two tools simultaneously work on both surfaces of the workpiece. This creates a unique condition with two heat sources and two stirring motion sources. To understand the temperature distribution and material flow in this process, modeling was conducted using Computational Fluid Dynamics (CFD). The upper and lower tools in the one-step double-side FSW process operate under identical conditions: a rotation speed of 1500 rpm, a welding speed of 30 mm/min, and a tilt angle of 0 degrees. The aluminum plate is treated as fluid, while the tools are considered solid in the model. The results of the temperature distribution modeling were validated against published studies, and the material flow was verified through macro- and microstructural observations of the cross-section. The validation showed that the model is accurate, with an error of only 4.07%.
The new modification of a solar still chamber with hollow glass: An experimental comparison between perpendicular and inline hollow glass configurations: Referred to by: https://doi.org/10.31603/mesi.17044 Eko Prasetya Budiana; Muhamad Dwi Septiyanto; Satria Auliansyah; Naufal Rizky Sayyid; Indri Yaningsih; Syamsul Hadi
Mechanical Engineering for Society and Industry Vol. 5 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.13238

Abstract

Researchers around the world are conducting comprehensive studies on conventional single-slope solar stills (CS4). Recent trends have focused on minimizing heat loss and improving the productivity of these systems, particularly through modifications to the CS4 chamber. This present study examines the modified chambers of solar stills utilizing Perpendicular Hollow Glass Solar Still (PHGSS) and Inline Hollow Glass Solar Still (IHGSS). It provides a comprehensive analysis of the enhancements, highlighting key aspects such as productivity, energy balance, and efficiency, as well as introducing a potential new condensation site. To ensure accuracy and reliability, the results are validated using the coefficient he/hc from a previous study, which reported a margin of error of 7.76%. The application of hollow glass has proven its ability to produce distillate condensation due to the temperature gradient present between the inner surface of the hollow glass and the cavity it encloses. Moreover, the production and efficiency of both inline and perpendicular hollow glass highly exceeds those of conventional CS4.
Effect of tool rotation direction, pin overlap, and pin shape on material flow in one-step double-acting friction stir welding of stainless steel: A Modeling study Eko Prasetya Budiana; Rian Firmanda; Essam R. I. Mahmoud; Triyono
Mechanical Engineering for Society and Industry Vol. 6 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.13695

Abstract

Stainless steel is widely used in various industrial applications due to its excellent corrosion resistance and mechanical strength. However, conventional fusion welding of stainless steel often leads to several problems such as hot cracking, sensitization caused by chromium carbide precipitation, and large thermal distortion. Friction Stir Welding (FSW), a solid-state joining technique, has been developed to overcome these limitations by producing high-quality joints without melting the base material. Nevertheless, welding thick plates using conventional FSW frequently results in incomplete penetration. To address this limitation, a One-Step Double-Acting Friction Stir Welding (DA-FSW) technique is proposed, in which two tools operate simultaneously from the top and bottom surfaces of the workpiece. In this study, material flow behavior and heat distribution during DA-FSW of stainless steel are investigated using Computational Fluid Dynamics (CFD) simulation. The model considers variations in pin geometry (cylindrical, conical, triflate, and tapered triflate), tool rotation direction, and pin overlap. Stainless steel is modeled as a non-Newtonian fluid to represent its plasticized behavior under frictional heating. The simulation results show that complex pin geometries such as tapered triflate produce up to 15–20% higher material flow velocity and generate a more uniform temperature distribution (approximately 5–10% variation across the stir zone) compared with simple cylindrical pins. Furthermore, opposite tool rotation directions improve material mixing and reduce temperature gradients, while an optimal pin overlap increases heat generation by approximately 12%, leading to more stable material flow. These results demonstrate that the combination of complex pin geometry, opposing rotation direction, and appropriate pin overlap significantly improves thermal distribution and material flow stability, which are essential for achieving defect-free welds in thick stainless steel plates.
Energy, exergy, and economic (3E) of a single slope solar still by integrating hollow circular fins and soybean wax as a thermal energy storage system Irfan Santosa; Muhamad Dwi Septiyanto; Solikin Andriyanto; Eko Prasetya Budiana; Syamsul Hadi
Mechanical Engineering for Society and Industry Vol. 6 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.15162

Abstract

Energy, exergy, and economic value are examined for the efficiency and sustainability of a unique design for a single-slope solar still that utilizes hollow cylindrical fins and soybean wax as a phase change material (PCM). The three cases outlined, among others: case 1, a conventional single slope solar still (CS4); case 2, with hollow cylindrical fins (HCFS4), and case 3 with hollow cylindrical fins and soybean wax as PCM (HCFSWS4). Performance experimental evaluations of the three cases under the same meteorological conditions ensure a fair comparison of their performances and are carried out for 5 days of testing. The experimental results show that the distillate water yield over five days is 0.986 L/m2/day, 1.243 L/m2/day, and 1.364 L/m2/day for cases 1, 2, and 3, respectively. Also, the maximum energy efficiencies of cases 1, 2, and 3 are 48.9%, 66.1%, and 77.6%, respectively. It is observed that the average exergy efficiency in cases 1,2, and 3 is 33%, 40%, and 42%, respectively. Furthermore, economic analysis findings revealed that the costs per liter per square meter for cases 1, 2, and 3 are 0.06$/L/m2, 0.05$/L/m2, and 0.05$/L/m2, respectively.
Co-Authors . Triyono Aditya Rio Prabowo Agung Tri Wijayanta Budi Kristiawan Dwi Aries Himawanto Ericha Dwi Wahyu Syah Putri Essam R. I. Mahmoud Indri Yaningsih Indri Yaningsih Irfan Santosa Muhamad Dwi Septiyanto Muhayat, Nurul Naufal Rizky Sayyid Nurwijayanti Rian Firmanda Satria Auliansyah Sekar Gading Happy Hapsari Solikin Andriyanto Syamsul Hadi Syamsul Hadi Triyono Triyono Triyono Yohanes P. D. S. Depari