Evrimata: Journal of Mechanical Engineering https://evrimata.id/index.php/JME <p><strong><span style="font-size: 18.0pt;">Evrimata: Journal of Mechanical Engineering</span></strong></p> <p>The interdisciplinary research edition covers the following scientific areas:</p> <p style="margin: 0mm; margin-bottom: .0001pt;"><strong><span style="font-size: 0.875rem;">- Mechanical Engineering</span></strong></p> <p style="margin: 0mm; margin-bottom: .0001pt;"><strong>- Otomotive Engineering</strong></p> <p style="margin: 0mm; margin-bottom: .0001pt;"><strong>- Material Engineering</strong></p> <p><em><strong>Taking into account the interdisciplinary character</strong></em> of the journal, the authors in its materials should <em><strong>emphasize field of application </strong></em>of their research, always <em><strong>emphasizing the importance of the subject for</strong></em> the research community in related fields of knowledge.</p> en-US eko.yudiyanto@polinema.ac.id (Dr. Eko Yudiyanto, ST,MT.) hangga.wicaksono@polinema.ac.id (Hangga Wicaksono, ST,MT.) Mon, 20 May 2024 10:25:40 +0700 OJS 3.3.0.8 http://blogs.law.harvard.edu/tech/rss 60 Simulation of Heat Transfer Rate in Motorcycle Engine Cylinder with Variation of Distance Between Fins and Material https://evrimata.id/index.php/JME/article/view/12 <p>Cylinder blocks on motorcycles that do not use a radiator cooling mechanism generally use a fin mechanism around the motorcycle cylinder block. Fins on motorcycles are useful for spreading the heat from combustion from the inside out, so that the engine temperature does not heat up quickly. During the combustion process in the cylinder block can cause heat with a high temperature. If this heat is not immediately distributed around it will cause excessive heat and will cause over heating on the motorcycle, which can interfere with the performance of the motorcycle. Thermal analysis is often used to study heat transfer on many surfaces including fins, cylinder block of an internal combustion engine and also the material of the mold block. The engine cylinder with fins was designed using Autodesk Fusion 360 with different spacing between fins of 10 mm, 8 mm, 6 mm and 4 mm. The materials used for modeling in this study are Al 356 (cast alloy), AA 2014T6 (Wrought alloy), AA 1060 (Wrought alloy), cast iron with 2% nickel, AM60A-F (Cast alloy), Magnesium alloy (AZ63A), Aluminum 6061, Gray cast iron grade 20, Al 360 (cast alloy), Al 380 (cast alloy). The simulation results of the engine cylinder block made of cast iron with 2% nickel with fins having a spacing between fins of 4 mm and a cylinder perforation diameter of 4 mm on the fins are most suitable for a better heat transfer rate compared to the other materials used in this study</p> Mohamad Zainal Abidin Zainal, Sugeng Hadi Susilo Copyright (c) 2023 Evrimata: Journal Mechanical Engineering https://evrimata.id/index.php/JME/article/view/12 Thu, 14 Dec 2023 00:00:00 +0700 THE EFFECT OF PIN LENGTH AND COMPRESSIVE FORCE IN DOUBLE SIDE FRICTION STIR WELDING ON BENDING STRENGTH OF AA1100 https://evrimata.id/index.php/JME/article/view/16 <p>Many new welding methods have emerged to improve connection results, including friction stir welding (FSW). FSW is a welding method that is widely used in welding aluminium &nbsp;alloys. FSW method on AA1100 aluminium material has not yet obtained the maximum bending strength so it is necessary to study the improvement of the quality of FSW joints using the welding method on both sides or double side friction stir welding (DFSW). This study aims to determine the effect of pin length and downward force on double side friction stir welding (DFSW) on the bending strength of AA1100 aluminium . The independent variables of this study are pin length (1.5 mm, 2 mm, 2.5 mm) and downward force (30 kg, 35 kg, 40 kg, 45 kg). The controlled variables are shoulder diameter of 25 mm, machine table translational speed of 10 mm/min, spindle rotation speed of 1750 rpm, base plate temperature of 250ºC, and AA1100 plate thickness of 3.6 mm with butt joint type welding connection model. The method used in this research is experimental using the factorial design of experiment (DOE) data analysis method. The results of this study indicate that pin length and downward force have a significant effect on the bending strength of DFSW welded joints on AA1100. The maximum bending strength value of the welded joint was 289.59 MPa at a pin length variation of 2 mm and a compressive force of 35 kg. The percentage of weld defects including tunnel and flash in welded joints with maximum bending strength is identified as the least and the micro test results also show the least FeAl3 particle grains.</p> Sukma Satriawan, Agus Setiawan, Dwi Pebrianti, Zainah Binti MD. Zain Copyright (c) 2024 Evrimata: Journal Mechanical Engineering https://evrimata.id/index.php/JME/article/view/16 Mon, 08 Apr 2024 00:00:00 +0700 Characterization of the Bioenergy Potential of Corncob and Rice Husk mixtures in Biochar Briquettes https://evrimata.id/index.php/JME/article/view/22 <p>Briquettes are a form of solid fuel that is produced using waste from the agricultural, industrial and household sectors. For example, briquettes can be produced from biomass waste such as rice straw and corn cobs, which are potential resources that can be utilized to produce bioenergy in the form of briquettes. This study aims to develop and test the characteristics of biomass briquettes in order to evaluate the quality of the biochar briquettes and the calorific value they produce. The method used in this study was experimental, in which the adhesive and the composition of the mixed ingredients were varied as independent variables to affect the quality of the briquettes, while the moisture content, ash content, burning rate,put birds, calorific value is used as the dependent variable. In this study, the results obtained for water content ≤ 5%, volatile matter ≤ 10%, calorific value ≤ 6.553 cal/g, and a burning rate of 0.17 gram/minute which is expected according to the Indonesian National Standard (SNI) 01 6235 2000, namely the water content ≤ 8%, volatille matter ≤ 10%, calorific value ≤ 5,000 cal/g. The results of this study indicate that the biomass briquettes can meet the established quality standards, with appropriate moisture, ash and volatile matter content. In addition, the resulting calorific value also reaches the desired figure, indicating the potential of biomass briquettes as an efficient alternative fuel. The combustion rates found in this study also indicate that the biomass briquettes have characteristics that allow stable and effective combustion. Thus, this research succeeded in developing and testing the characteristics of biomass briquettes as an alternative fuel. The results of this study can contribute to the development of renewable energy sources and efficient use of biomass waste, as well as promote efforts to mitigate the negative impacts of the conventional energy sector on the environment.</p> Asrori Asrori, Mirza, Ach. Muhib zainuri, Eko Naryono Copyright (c) 2024 Journal of Evrimata: Mechanical Engineering https://evrimata.id/index.php/JME/article/view/22 Wed, 17 Apr 2024 00:00:00 +0700 THE EFFECT OF MIXING PLASTIC PYROLYSIS OIL WITH PERTAMAX AND VARIATION OF IGNITION TIMING ON PERFORMANCE AND EMISSIONS https://evrimata.id/index.php/JME/article/view/18 <p>One source of energy that has not been utilized optimally is waste. One of the abundant waste materials is plastic waste. Processing plastic waste in the form of plastic pyrolysis oil affects the performance and emissions of motor vehicles when mixed with Pertamax fuel, as well as variations in ignition timing. The purpose of this research is to determine the influence of changes in ignition timing on engine power, as well as to investigate the impact of using Pertamax mixed with pyrolysis fuel results on engine power. The fuel mixture is prepared based on volume ratios (0%, 10%, 20%, 30%, 100%) of pyrolysis to gasoline, with engine speeds ranging from 6500 to 9000 rpm. The experiment results, when the ignition timing was set at 6⁰, 8⁰, and 10⁰, there was a slight decrease in power and less stable results in some engine speed.</p> Naufal Hana Rizqullah, Ratna Monasari, Sri Utami Handayani, Candra Aditya Copyright (c) 2024 Journal of Evrimata: Mechanical Engineering https://evrimata.id/index.php/JME/article/view/18 Thu, 18 Apr 2024 00:00:00 +0700 ANALYSIS OF 3D PRINTING APPLICATIONS WITH ABS FILAMENT MATERIAL FOR DESIGNING UNMANNED AIRCRAFT BODYBUILS https://evrimata.id/index.php/JME/article/view/28 <p>This research applies 3D printing technology using ABS filament material in designing the body of an unmanned aircraft. A quantitative approach to the simulation results is used to highlight the technical superiority of unmanned airframes. The analysis includes aspects such as structural strength. These findings provide deep insight into the potential application of 3D printing technology in the aerospace industry, as well as its application to the design, production costs and performance of unmanned aircraft. The research results show that the use of 3D printing with ABS filament has the potential to produce a strong and light aircraft body. From the research, it was found that the ideal layer thickness parameter of 0.1 to 0.2 mm does not exceed half the size of the nozzle diameter of 0.4 mm to produce fine raster fibers on the aircraft body without a crew. From the research it was found that the ideal speed parameter for printing the aircraft body frame unmanned aircraft with ABS filament material at a speed of 30 mm/s to 50 mm/s to produce a stable raster fiber size on the aircraft body and the percentage parameter of a good fill for printing the body frame of an unmanned aircraft is at a value of 20% up to 40%. The research results found the best printing parameters for printing aircraft frames with the parameter formula of 0.15mm 3D layer height, 20% gyroid infill, with a speed of 30mm/s maximum tensile strength reaching 30.7 MPa. By considering the challenges and opportunities associated with the use of 3D printing technology, this research provides a solid foundation for further development in designing and producing unmanned aircraft bodies efficiently and innovatively.</p> Lazuardi Lazuardi, Muhammad Akhlis Rizza , Sugeng Hadi Susilo, Maryono Maryono Copyright (c) 2024 Journal of Evrimata: Mechanical Engineering https://evrimata.id/index.php/JME/article/view/28 Thu, 18 Apr 2024 00:00:00 +0700