cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Michaud, Patricius F
Contact Email
jurnalmecomare@gmail.com
Phone
+6281360000891
Journal Mail Official
trigin@pelnus.ac.id
Editorial Address
Jl. Cikutra Baru, Bandung, Provinsi Jawa Barat
Location
Kab. bandung,
Jawa barat
INDONESIA
INTERNATIONAL JOURNAL OF MECHANICAL COMPUTATIONAL AND MANUFACTURING RESEARCH
Published by Trigin Publisher
ISSN : 23014148     EISSN : 29623391     DOI : 10.35335/MECOMARE
Core Subject : Engineering,
Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Mechanical Engineering
International Journal of Mechanical Computational And Manufacturing Research invites you to consider submitting original research papers for possible publication after peer review. The scope of this international, scholarly journal is aimed at rapid dissemination of new ideas and techniques and to provide a common forum for significant research and new developments in areas of Mechanical Computational And Manufacturing Research.
Arjuna Subject : Teknik (semua kategori) - Komputasi Mekanik
Articles 95 Documents
 6   7   8   9   10 
Study of the effect of wind direction on ship helideck using computational fluid dynamics Fauzi, AH Fauzi; Silalahi, NH Silalahi
International Journal of Mechanical Computational and Manufacturing Research Vol. 13 No. 4 (2025): February: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v13i4.235

Abstract

The safety and aerodynamic stability of a ship's helideck is a crucial factor in maritime flight operations, especially in variable wind conditions. One of the main challenges is the interaction between the airflow and the ship's structure which can create turbulence and recirculation zones that affect the stability of the helicopter during takeoff and landing. This study aims to analyze the airflow characteristics around the ship's helideck at various wind incidence angles using the Computational Fluid Dynamics (CFD) method. The simulation model includes ship and helideck geometry modeling, with boundary conditions set at 1 atm atmospheric pressure, 298 K temperature, and 10 m/s wind speed at angles of 0° to 180°. The simulation results show that the maximum pressure occurs at a 90° angle, while the maximum velocity of the airflow is recorded at a 0° angle. Recirculation zones and air vortices are significantly formed at small angles such as 150°, which can destabilize the helicopter. These findings emphasize the importance of helideck design optimization and aerodynamic mitigation strategies to improve flight safety. The limitation of this study lies in the lack of quantitative measurement of the intensity of the vortex, so further research is recommended to integrate experimental validation and more complex turbulence models to strengthen the reliability of the results.
Influence Use of Clay Soil With Additions Fly Ash (Rock Ash) Against Soil Classification Properties and CBR Laia, Rahmat Abadi; Nasution, Ridwan; Lubis, , Muhammad Yusuf Parlagutan
International Journal of Mechanical Computational and Manufacturing Research Vol. 13 No. 4 (2025): February: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v13i4.196

Abstract

Soil is the basis of a road foundation, building and also in a civil work where the material consists of an aggregate (granules) or solid minerals that are cemented (chemically bound) to each other from organic materials that have weathered (which particulate matter accompanied by liquid and gas that fills an empty space between the solid particles) The additive used in this research is fly ash. The method used in this research is the experimental method, namely a method carried out by conducting an experiment to obtain data. Based on the results of research testing on the use of clay soil and the addition of fly ash, the CBR value was obtained after being corrected with a percentage of 100% clay soil, and 0% fly ash obtained a CBR value of 6.06% with a soil classification of A-7-6. The use of 75% clay soil and 25% fly ash obtained a CBR value of 15.20% with soil classification A-5. The percentage of use of 50% clay soil and 50% fly ash results in a CBR value of 18.15% with classification A-4. The CBR value and soil classification are better for 50% clay soil and 50% fly ash.
Effect of Cutting Speed of Carbon Steel ST 41 on Cutting Temperature in Turning Process Larosa, Albert Hendi Yanto; Lubis, Yakmuri; Hafid, Burhan
International Journal of Mechanical Computational and Manufacturing Research Vol. 13 No. 4 (2025): February: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v13i4.197

Abstract

The turning process is one of the most widely used lathe machining techniques in manufacturing, involving the interaction between the machine tool, workpiece, and cutting tool. During cutting, friction between the chisel and the workpiece generates excessive heat, with most cutting energy converted into heat. This study examines the effect of cutting speed on temperature in chisels, chips, and ST41 carbon steel workpieces at various lathe speeds. Using an experimental method, cutting speeds of 260 RPM, 560 RPM, and 800 RPM were tested. Data collected included lathe rotation speed, specimen temperature, chisel temperature, chip temperature, cutting depth, and chip mass. Results show that temperature increases with cutting speed. At 260 RPM, the chisel temperature was 38.46°C, the workpiece 36.83°C, and the chip 36.21°C. At 800 RPM, the highest tool temperature was 65°C, the workpiece reached 62.33°C, and the chip 48.56°C. This indicates that higher cutting speeds generate more heat, making the turning process more thermally intensive.
Comparative analysis of mechanical strength in aluminum welding joints of AA 5052 and AA 6061 plates Telaumbanua, Safitiar; Derlini, Derlini; Lubis, Yakmur
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 1 (2025): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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

Abstract

Oxy-Acetylene welding is a commonly used manual welding method due to its affordability and portability, as it does not require electricity. This process joins metal surfaces by heating them with a flame from burning a mixture of acetylene (C₂H₂) and oxygen (O₂), with or without filler metal, and without applying pressure. Aluminum, known for its lightweight, corrosion resistance, and good conductivity, is often alloyed with elements like Cu, Mg, Si, Mn, Zn, and Ni to enhance its mechanical properties. This study analyzes the mechanical properties and microstructure of Oxy-Acetylene welded aluminum alloys AA 5052 and AA 6061. Tests conducted include tensile, flexural (bending), and hardness tests. The tensile test showed AA 6061 had a higher tensile strength of 78.4 MPa, though still considered brittle due to the presence of weld defects. These defects were linked to the uneven melting and poor adhesion of the welding wire, resulting in gaps. The highest bending strength was also recorded by AA 6061 at 70.44 MPa with no fractures, while AA 5052 had the lowest at 50.1 MPa with fractures in the weld metal. Overall, Oxy-Acetylene welding on both materials showed imperfections due to inconsistent weld quality.
Effect of Sea Sand Addition on Liquid Limit, Plasticity Index, and CBR of Clay Soil Ndruru, Fajar Kurniawan; Nasution, Ridwan; Lubis, Yusuf Parlagutan
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 1 (2025): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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

Abstract

Soil is a composition of grains resulting from weathering of massive rock masses, where the size of each grain can be as large as gravel, sand, silt, clay and uncemented intergranular boxes including organic materials. Laboratory testing includes liquid limit tests, plastic limits, and plasticity index, soil specific gravity, compaction and laboratory CBR to determine soil strength. The method used in this study is the Experimental method, which is a method carried out by conducting experimental activities to obtain data. Based on the results of the research test using clay soil and sea sand, the CBR value with 100% clay soil and 0% sea sand was 5.41% with soil classification A-7-6, 85% clay soil and 15% sea sand obtained a CBR value of 8.82% with soil classification A-4 and 70% clay soil with 30% sea sand obtained a value of 10.55% with soil classification A-2-6. The better CBR value and soil classification are in 70% clay soil and 30% sea sand.
Comparison of cutting speed variations in the laser cutting process on the results of SS400 steel plate products Amalia, Mutia; Purba , Adi Syahputra; Rafly, Stevian; Cuana, Rona; Ritonga, Fatima Sari
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 1 (2025): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v14i1.258

Abstract

Computer Numerical Control (CNC) laser cutting as a manufacturing tool for plate cutting, where industrial players are encouraged to get maximum results. Laser cutting is one of the tools used by the industrial world to maximize cutting results. The aim of this research is to determine the results of differences using cutting speed parameters on SS400 steel plate with a thickness of 1 mm using CNC fiber laser cutting on the surface roughness of the material. The method used in this research is a real experimental research method and data analysis to analyze the parameters of cutting plates using laser cutting on surface roughness with the number of experiments being replicated 2 times for the research process by testing surface roughness using Surface Roughness.
Dimensional measurement calibration of dial calipers based on JIS B 7507: 2016 standard in the measurement laboratory Manurung, Agnes Br; Purba, Adi Syahputra; Manalu, Ari Angga; Juwita, Erna; Aryswan, Adhe
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 1 (2025): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v14i1.265

Abstract

Dial calipers are very frequently used by both measurement laboratories and production. Dial calipers need to be calibrated every 12 months. The purpose of this study is to provide an understanding of how to calibrate a dial caliper, using a method based on JIS B 7507:2016 Standard. The JIS standard itself provides guidance and reference for dial caliper calibration. Based on the calibration results obtained, it is known that the dial caliper has deviation or error values in each measurement (outside, inside, depth, and step) with values of 0.0200 mm and -0.01000, referring to an accuracy of +/-0.03mm. After evaluation based on the standard, these error values still meet the requirements of JIS B 7507-2016. The benefit of this calibration is dial calipers are important to calibrate both before and after use to ensure optimal accuracy and consistent measurement results and also this calibration performed is sufficiently valid and reliable.
Modification of the jig slider grinding hook design Andaresta, Windy; Purba, Adi Syahputra; Yuniarsih, Nidia; Marbun, Abri Andry Saresa; Saputra, Rangga
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 1 (2025): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v14i1.266

Abstract

Tools such as jigs are becoming important in the production process. Jigs are often used in the cutting or shaping process in the form of making workpieces in production. However, ever-changing variations in demand can lead to changes in jig efficiency. Therefore, modifications are necessary to maintain accuracy and meet the demands of diverse markets. This research was carried out by modifying the design of the slider jig on the width of the rail slider which was enlarged from before and adding support to the clamping plate which aims to improve the accuracy and effectiveness in the drilling process. To find out the results of the difference before and after the modification of the slider jig, a test was carried out by conducting a visual inspection of the profile point hook that had been ground using a profile projector with a scale of 10 :1 which showed that the results of this modification were included in the value of the drawing tolerance value and in accordance with the specifications in the company and based on data taken from PT. XYZ in the engine working time of 3 hours and 3 minutes, a total output of 164 pcs was found out of the total target of 158 pcs. This resulted in a productivity percentage of 103.80%. This shows that this jig modification is effective when used.
Solid block to assembly block conversion on a welding Marbun, Abri Andry Saresa; Purba, Adi Syahputra; Ramadhan, M. Noviriandi; Andaresta, Windy; Cahyagi, Danang
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 2 (2025): August: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v14i2.267

Abstract

Block damage often occurs due to the pressing process and the presence of residual welding dirt on the slug so that a repair process is needed by means of grinding. If there is damage to the solid block, repairs are carried out on all sides of the block so that this is less effective and efficient in repair time. This research was conducted by changing the design of solid blocks into assembly blocks which aims to make the process of repairing blocks effective and efficient. To find out the results of the differences between solid blocks and assembly blocks, a trial was carried out by calculating the repair process time using a grinding machine with a depth of 0.04 mm. The results of the solid block repair process trials obtained an average of 397 seconds while the assembly blocks obtained an average of 248 seconds. Thus cutting the repair process time by 149 seconds. With this design change, the effectiveness and efficiency of block repair time is obtained.
Dimensional check of weld neck flange based on ASME B16.5 Ritonga, Fatima Sari; Purba, Adi Syahputra; Simanjuntak, Jefri Kemri Rodi Samuel; Fadilah, Nurul; Amalia, Mutia
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 2 (2025): August: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v14i2.268

Abstract

This study aims to verify that the dimensions of a weld neck flange conform to ASME B16.5 standards. The flange used is a raised face type made of carbon steel ASTM A105N with 16-inch NPS, selected for its corrosion resistance, and welded with UNS 006625, a nickel-rich alloy that enhances corrosion protection. Dimensional checks were performed on five samples, each measured three times, using both visual inspection and measuring tools, including a roughness comparator and vernier caliper. Key dimensions measured include outside diameter (705 mm, tolerance +4 mm/-1 mm), inside diameter (333.3 mm, ±1.5 mm), bolt circle diameter (616 mm, ±1.5 mm), flange thickness (88.90 mm, +3 mm), and hub thickness (30.43 mm post-welding, with tolerance not less than 12.5% of pipe wall thickness) the visual inspection assessed surface roughness within the acceptable range of 3.2 µm to 6.3 µm. The inspection results showed that all measured dimensions were within the permissible limits, confirming that the weld neck flange meets the requirements of ASME B16.5.

Page 9 of 10 | Total Record : 95

 6   7   8   9   10 

Filter by Year

2020 2025


Reset
Filter By Issues
All Issue Vol. 14 No. 2 (2025): August: Mechanical Computational And Manufacturing Research Vol. 14 No. 1 (2025): May: Mechanical Computational And Manufacturing Research Vol. 13 No. 4 (2025): February: Mechanical Computational And Manufacturing Research Vol. 13 No. 3 (2024): November: Mechanical Computational And Manufacturing Research Vol. 13 No. 2 (2024): August: Mechanical Computational And Manufacturing Research Vol. 13 No. 1 (2024): May: Mechanical Computational And Manufacturing Research Vol. 12 No. 4 (2024): February : Mechanical Computational And Manufacturing Research Vol. 12 No. 3 (2023): November: Mechanical Computational And Manufacturing Research Vol. 12 No. 2 (2023): August : Mechanical Computational And Manufacturing Research Vol. 12 No. 1 (2023): May: Mechanical Computational And Manufacturing Research Vol. 11 No. 4 (2023): February: Mechanical Computational And Manufacturing Research Vol. 11 No. 3 (2022): November: Mechanical Computational And Manufacturing Research Vol. 11 No. 2 (2022): August: Mechanical Computational And Manufacturing Research Vol. 11 No. 1 (2022): May: Mechanical Computational And Manufacturing Research Vol. 10 No. 4 (2022): February: Mechanical Computational And Manufacturing Research Vol. 10 No. 3 (2021): November: Mechanical Computational And Manufacturing Research Vol. 10 No. 2 (2021): August: Mechanical Computational And Manufacturing Research Vol. 10 No. 1 (2021): May: Mechanical Computational And Manufacturing Research Vol. 9 No. 4 (2021): February: Mechanical Computational And Manufacturing Research Vol. 9 No. 3 (2020): November: Mechanical Computational And Manufacturing Research More Issue