Jurnal Konversi Energi dan Manufaktur UNJ
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ANALISIS TEGANGAN EKUIVALEN FENDER BENTUK SETENGAH PIPA DAN BENTUK PELAT H PADA KAPAL MENGGUNAKAN METODE ELEMEN HINGGA: Analysis of Equivalent Stress on Half-Pipe and H-Plate Shaped Fenders on Ships using Finite Element Method
Full text linkFenders are structures installed on the edges of ships to protect the ship's hull from impact with the dock. The main function of fenders is to absorb the collision energy generated by the ship's impact during berthing at a dock. The load applied to fenders on each ship results in stress distribution in the surrounding hull area, which can lead to various issues such as damage, cracks, deformations, and others. Additionally, the presence of fenders with different shapes can affect the stress distribution values in the surrounding hull area. Hence, a local stress analysis using finite element method software is necessary. The analysis focuses on static loads originating from the ship itself when docked at a port. However, only the fender section is analyzed, and it is not necessary to consider the entire ship's body. The objective of the analysis is to determine the stress characteristics and maximum stress values in the fender itself. The analysis results reveal that the highest stress value occurs in the half-pipe-shaped fender with a value of 0.22809 MPa. Based on these findings, it can be concluded that the stress values in the fender meet the allowable standards. In conclusion, this analysis provides an understanding of stress and the maximum stress value in ship fenders. This knowledge is crucial to ensure that fenders effectively fulfill their function of protecting the ship from impacts with docks
ANALISIS DESIGN CHASSIS ALAT ANGKUT BUAH SAWIT KAPASITAS 500 KG DENGAN METODE ELEMEN HINGGA: Chassis Design Analysis of Oil Palm Fruit Transportation Equipment Capacity 500 kg using Finite Element Method
Full text linkCurrently, the area of oil palm plantations in Indonesia is increasing. However, the condition of oil palm plantations generally has very minimal infrastructure. Therefore, a means of transporting palm fruit is needed that can move in plantation areas that have minimal infrastructure and have the ability to turn with a small turning radius. Chassis is the most important component in every vehicle. Chassis is a component used to support the load, vehicle body, engine, and driver. The development of technology in the field of engineering requires the chassis design of a vehicle to be light but strong. Therefore, this study aims to analyze the strength and safety factor of the chassis using the Finite Element Method. The software used in this analysis is SolidWorks 2018. By doing this analysis, the safety factors in the chassis design will be known. In this design, the magnitude of the factor of safety must be more than two. 3D modeling and material data are required to run the simulation of strength and factor of safety analysis. The material that will be used in the design of this chassis is ASTM A36 steel. From this research, it is expected that the chassis can withstand a maximum load of 500 kg and a maximum driver of 100 kg. From this research, it is expected that the chassis can withstand a maximum load of 500 kg and a maximum driver of 100 kg. From the simulation results using the SolidWorks 2018 software, it can be seen that the safety factor results when accelerating are 3, braking are 3.4 and when turning are 4.2. So it can be concluded that the chassis design is certainly safe
PENGARUH TEMPERATUR DAN TEKANAN TERHADAP HASIL CETAKAN POLYPROPYLENE MENGGUNAKAN MESIN INJECTION MOLDING VERTIKAL: The Influence of Temperature and Pressure on the Results of Polypropylene Molding Using a Vertical injection Molding Machine
Full text linkCurrently, the use of plastic products is increasing in various fields, due to their flexibility and low production costs. The injection molding process is a technique that is often used in the formation of plastic products. The focus of the problem of this study is the effect of heating temperature and hydraulic pressure on the results of box and gear molds using the injection molding process. The test method uses variations in temperature and hydraulic pressure to produce the maximum mold shape in the box and gear. From the results of the injection molding test for full yield gear products with a melt temperature of 368ºC, a mold temperature of 40ºC, and an injection pressure of 490 Psi, there was a failure in the test results due to the release of liquid which did not come out directly to fill the mold, because the pressure from the hydraulic jack must gradually
ANALISIS INDIKASI RESIKO POSTUR PENGGUNA DESAIN MEJA BELAJAR PORTABEL : Analysis of User Risk Posture Indication for Portable Study Desk
Full text linkStudy portable desks can help people easily move from one another place. Using a study portable desk would make users fix the position once a few moments so that they risk experiencing bodily discomfort. Analysis indications of posture risk can be done by selecting launch rapid upper limb assessment (RULA) analysis from the ergonomic tools toolbar in CATIA software. This research aims to identify movements that occur when using a portable study desk and to analyze user posture risks that can be experienced when using a portable study desk. Based on the research results, it is known that the body posture of portable study desk users for group A on the upper arms is in the range of 20-45°, and the lower arms are in the range of 60-100°. The wrist enters the neutral position range. The rotation of the wrist can be seen that the hand is pointing inward. It has a degree of freedom of 90° with a maximum flexion angle of 160° and a minimum extension angle of 0°. Group B body posture for the stem body has a degree of freedom of 0°. The legs experience a slight downward movement with a degree of freedom of 6.061° and a maximum flexion angle of 135°. Posture analysis results for body parts. Details of the upper arm, forearm, wrist, and wrist twist have a score of 1, which means no posture needs to be corrected and the posture is acceptable. Details of body parts, namely neck, trunk, and legs, are indicated in green, which means no posture needs to be corrected and the posture is acceptable. The score results for body parts with the static posture option get an assessment score of 2 with a green color indication, so it can be concluded that the risk indication for this posture is acceptable
COVER AND PREFACE JURNAL KONVERSI ENERGI DAN MANUFAKTUR VOL. 9 NO. 1 (2024)
No full textSUMMARY. Rohmatin et al., in their paper, identified the movements that occur when using a portable study table and analyzed indications of user posture risks that could be experienced when utilizing a portable study table. Wahyudi and Kusuma, in their paper, analyze heat rate losses due to parameter deviations according to actual conditions and calculate cost savings and possible improvements to determine the performance of PLTU Banten 3 Lontar unit 2. Medikano et al., in their paper, innovate the wrench to simplify the machine maintenance process. Prasetyo et al., in their report, designed, developed, and tested a prototype of a grain drying machine based on hybrid PLTS technology. This research focuses on drying machine power calculations, thermal analysis, grain drying efficiency, and evaluation of PLTS systems. Sukarno et al., in their paper, developed an automatic water recirculation system to save clean water use and energy consumption in tilapia cultivation using a microcontroller based on pH and turbidity values (NTU). Wijianto and Alfitrah, in their paper, simulated the fluid flow in this downdraft-type gasification installation to determine the influence of heat distribution or temperature in the gasification equipment installation and the effect of the mass flow rate of cooling water on the airflow out of the reactor. Widodo and Golwa, in their paper, carried out an analysis using finite element methods (FEM) to simulate complex physical phenomena to obtain deformation and strain values for HSS chisels in the turning process with ST42 steel workpieces. Nuha and Golwa, in their paper, analyzed the wear value of carbide-type tool edges in the ST41 material turning process based on the friction force between the tool and the workpiece
EFEK PENGGUNAAN DOUBLE DAN SINGLE PISTON CALIPER TERHADAP WAKTU DAN JARAK TEMPUH PADA PENGEREMAN SEPEDA MOTOR 125 CC: The Effect of Double and Single Piston Caliper on Time and Distance of 125 cc Motorcycle Braking
Full text linkThis study aims to determine the distance and braking time on 125cc motorcycle vehicles by using two types of callipers, namely single-piston and double-piston callipers. The research method uses experimental methods. There this method will compare 2 variables to get the results of the study by sulking on SNI Braking. By varying the two callipers of different types and using the brake pressure gauge, stopwatch, and meter to find out the pressure, time, and distance when conducting the test, the results of the test are calculated by the formula of regularly changing straight motion force (GLBB) slowed down, braking force and braking efficiency formula in order to get more valid results. Based on the results of this research report, it was concluded that the 2-piston callipers are superior to the 1-piston callipers in terms of average mileage of 0.51 m (9.81 m – 9.30 m) in front wheel braking and average mileage of 0.42 m (4.63 m – 4.21 m) in rear wheel braking and average stopping time of 0.21 s (2.51 s – 2.30 s) with the average effect of braking efficiency value of 5% (57% - 52 %) on front wheel braking and the average time for 0.21 s (1.58 s – 1.37 s) with the average effect of efficiency value of 5 % (47 % - 42 %) on rear wheel braking. So that makes 2-piston callipers better used in 125 cc vehicles than 1-piston callipers in terms of braking aspects
COVER AND PREFACE JURNAL KONVERSI ENERGI DAN MANUFAKTUR VOL. 8 NO. 2 (2023)
No full textFirmansyah et al., in their paper, conducted local stress analysis using finite element-based software. The study is carried out on the static load that comes from the ship when it is anchored at the harbour. This analysis aims to determine the fender's stress characteristics and maximum stress value. Yuniadi and Kurniawan, in their paper, analyzed the strength and safety factor of the chassis using the finite element method to determine the safety factor in the chassis design that was made. Darmawan and Kurniawan, in their paper, determine the wear rate of the brake pad so that the prediction of the service life of the brake pad is known and the factors causing the difference in the wear rate of the brake pad installed on the trailer bogies and motor bogies. Yulianti et al., in their paper, discuss the hydrogen output monitoring system on Fuel Cell Electric Vehicles (FCEV) using the Node-RED software application and regarding flowmeters with RS 232 output. Syaka et al., in their paper, add injectors that aim to improve fuel delivery fuel at high speed, which is expected to boost the power and torque of the standard vehicle. The vehicle used is a motorcycle with a programmed fuel injection (PGM-FI) system for the fuel atomizer. Sugiyanto et al., in their paper, varied the heating temperature and hydraulic pressure on the box and gear moulds using an injection moulding process to produce the maximum mould shape for the box and gear shapes. Basori et al., in their paper, designed a storage rack capable of accommodating and holding a load of gas cylinders and their contents and can be mobilized at a certain height
PERBANDINGAN VARIASI DURASI INJEKSI DAN WAKTU PENGAPIAN TERHADAP PERFORMA DAYA MESIN MOTOR 4 LANGKAH MENGGUNAKAN BAHAN BAKAR PERTAMAX: Injection Duration and Ignition Timing Variations Comparison to Power Performance of 4 Stroke Engine Motorcycle Using Pertamax Fuel
Full text linkThe main component of the injection system is the electronic control unit (ECU) functions to optimize the performance of the vehicle engine. The ECU has the functions of injection duration and ignition time as an injector and ignition controller. The purpose of the study analyzed the comparison and differences in variations in the regulation of injection duration and ignition time of injection motor engines against the power output of the engine using pertamax fuel by experimental methods. There are comparisons and differences in power and torque in each variation of the programmable ECU and standard ECU settings. The highest average power and torque results at the standard ECU setting compared to the programmable ECU setting have lower average power and torque. Due to the different injection duration and ignition time of each setting, the power and torque generated by the motorcycle engine can be higher or lower per variation of the Programmable ECU setting. In addition to the difference in power output and engine torque, it also has differences in SFC values and the average Thermis Efficiency produced varies by variation of the programmable ECU settings
ANALISIS LAJU DEFORMASI PAHAT CARBIDE PADA SIMULASI PEMBUBUTAN BAJA ST41 DENGAN MESIN BUBUT KONVENSIONAL MENGGUNAKAN SOFTWARE ANSYS: Analysis of Carbide Tool Deformation Rate in Simulation of ST41 Steel Turning with Conventional Lathe using ANSYS Software
Full text linkIn the machining process, knowledge of the tool and workpiece is required to achieve maximum results between quality and productivity. Tool wear parameters are very important to know because the process of changing or sharpening the tool can be predicted. One thing that influences the tool wear rate is the friction force between the tool and the workpiece. This frictional force will produce vibrations and heat energy, causing the chisel grains to erode so that they will experience wear within certain standards. This research aims to analyze the wear value of carbide-type tool edges in the ST41 material turning process based on the friction force that occurs between the tool and the workpiece. Then, from the wear value, the recommended cutting speed is. The method used is simulation-based research using ANSYS software, especially ANSYS Mechanical, by entering predetermined parameters, including diameter and spindle rotation. From the simulation results, the total deformation of workpieces with diameters of 25 mm, 35 mm and 45 mm is 0.363 μm, 0.155 μm and 0.152 μm, respectively. It can be concluded from the simulation results that the largest total deformation is at a diameter of 25 mm
ANALISIS PENGARUH VARIASI CDI DAN BUSI TERHADAP PERFORMA DAN KONSUMSI BAHAN BAKAR PADA MOTOR VESPA STRADA: Influence Analysis of CDI and Spark Plug Variation on Performance and Fuel Consumption of Vespa Strada Motors
Full text linkIn current developments, CDI ignition systems are widely used in motorcycle vehicles. This study aims to determine the effect of using variations of CDI Limiter and CDI unlimiter with spark plugs on torque, power, and fuel consumption using pertamax fuel. The research method is an experimental research method, carried out on a Vespa Strada 150 CC motorcycle. Research data obtained from tests using a dynamometer to determine the value of torque and power generated which will later be analyzed by directly observing the experimental results then drawing conclusions and determining the results of research conducted in the form of tables and diagrams, while for testing fuel consumption using measuring cup and calculating fuel consumption. Based on this report, shows that there are differences in torque, power, and fuel consumption produced. The highest torque value is found in the CDI unlimiter variation with platinum spark plugs at a rotating speed of 11000 rpm producing a torque of 7.09 Nm, while the highest power value is also found in the CDI unlimiter variation with Platinum Spark Plugs at 11000 rpm of rotating speed producing power of 10.7 HP and fuel consumption (SFC) the highest value was obtained in the CDI Limiter variation with platinum spark plugs at 11000 rpm resulting in an SFC of 0.67 L/HP.h