Evrimata: Journal of Mechanical Engineering

The Effect of Pin Length and Compression Force in Double Side Friction Stir Welding on Tensile Strength of AA1100

Mochamad Andiansyah — 2024-12-31

Friction Stir Welding (FSW) is solid state welding without additives and does not produce pollution. There are two FSW welding methods, namely single side (FSW) and double side (DFSW). The FSW process in previous studies using aluminum materials, especially AA 1100 type, has not obtained optimum joint strength. Therefore, it is necessary to conduct a research study on improving the quality of tensile strength of welding results using the DFSW method on AA1100. The purpose of this study is to determine the effect of variations in pin length and compressive force on the maximum tensile strength of the results of Double Side Friction Stir Welding Aluminum Alloy 1100 welding joints. The method used in this research is experimental. The welding process uses Double Side Friction Stir Welding, by varying two independent variables namely pin length 1.5 mm, 2 mm, 2.5 mm and compressive force 30 kg, 35 kg, 40 kg, 45 kg. The controlled variables used include travel speed (10 mm/min), heating temperature (250℃), shoulder diameter (25 mm), heating plate width (10 mm), and Aluminum AA1100 plate thickness (3.5 mm), with butt joint type welding. The data analysis used is Factorial Design of Experiment (DOE). The results of this study indicate that pin length and compressive force affect the tensile strength of AA1100 material welds. The maximum tensile strength value of DFSW welding results is 90.16 MPa or 80.5% of the tensile strength of the parent material. The maximum tensile strength value was obtained from the interaction of 2 mm pin length and 45 kg compressive force.

SINGLE PROPELLER DESIGN OF FLYING ELECTRIC VEHICLES

Abbi Ewton Syahyogi — 2024-12-31

The development of passenger drone technology has opened up new opportunities in the air transportation industry, offering innovative and efficient mobility solutions. One of the key components in eVTOL vehicle design is the propeller, which functions to produce the thrust required for takeoff, hovering and flying. Efficient and optimal propeller design is very important to improve the performance and energy efficiency of these vehicles. The method used in this research includes computational fluid dynamics (CFD) simulation analysis to model the interaction between the propeller and air flow. The methodology used includes computational fluid dynamics (CFD) simulations to analyze the air flow and forces acting on the propeller, as well as prototype testing to validate the simulation results.

ANALYSIS OF THE APPLICATION OF 3D PRINTING TO DESIGN A WATER THRUSTER JET BOAT

LAZUARDI LAZUARDI — 2024-12-31

This study analyzes the application of 3D printing technology in designing and building a water jet propulsion for boats. 3D printing technology provides significant advantages in terms of design flexibility, cost reduction, and the ability to produce components with high complexity that are difficult to achieve with traditional manufacturing methods. The research process begins with creating a digital design using CAD (Computer-Aided Design) software. The material used is ABS (Acrylonitrile Butadiene Styrene) filament, which is known for its strong mechanical properties and resistance to maritime conditions. The prototype of the water jet propulsion was then produced using a 3D printer. The results showed that 3D printing of ABS filament allows it to be used as an impeller component with a maximum tensile strength of 24 Mpa which is stated to be safe because the maximum stress that occurs in the impeller when working is 18.73 Mpa. The performance analysis of the resulting water jet propulsion reached 571 cm/s indicating increased efficiency and operational stability. The conclusion of this study is that 3D printing technology is effective and efficient in designing and building water jet propulsion, offering an innovative solution that has the potential to improve the performance and efficiency of the maritime industry.

Sustainable Power Generation through Dual-Axis Solar Tracking for Off Grid 100Wp Photovoltaic Systems

Widjanarko — 2024-12-31

This study investigates the development and implementation of a dual-axis solar tracking system for off-grid 100Wp photovoltaic (PV) systems to enhance energy harvesting efficiency and ensure sustainable power generation. The research addresses the limitations of fixed-tilt PV systems, which often underperform due to suboptimal solar alignment, especially in regions with dynamic weather conditions. The results demonstrated a significant increase in energy output, achieving up to 13,75% higher efficiency compared to static systems under similar operational conditions. This improvement is attributed to the system's ability to maintain optimal solar panel orientation throughout the day, facilitated by an advanced tracking algorithm and real-time sensor integration. The distinctive features of the developed system include its cost-effective design, adaptability to various geographical locations, and robust performance under fluctuating environmental conditions. The findings suggest that the dual-axis tracking system is wellsuited for deployment in remote or off-grid areas where reliable and efficient power generation is critical. Practical applications of this system are particularly relevant for rural electrification, agricultural irrigation systems, and other decentralized energy solutions in regions with abundant solar resources.

The Effect of Combustion Chamber Volume and Engine Rotation on Temperature and Compression Pressure of Single Cylinder Diesel Engine

Sigit Prasetyo — 2024-12-31

The effect of combustion chamber volume and engine rotation on the temperature and
compression pressure of this single-cylinder diesel engine aims to convert the use of diesel
fuel in diesel engines into gasoline fuel by utilizing high compression without using the
help of spark plugs during ignition. The main focus of the study is to understand the effect
of variations in combustion chamber volume and engine rotation on temperature and
compression pressure in order to find optimal operating conditions. The General 170fd
single-cylinder diesel engine was used as the object of research. The testing tools used
include the TC-08 Thermocouple sensor module, the thermocouple sensor, and the
pressure gauge to measure the temperature and compression pressure. The research was
carried out using various gasket thicknesses, namely 0.6mm, 0.8mm, 1.4mm, 1.6mm, and
1.8mm to vary the volume of the combustion chamber. The data collected was analyzed
to determine the relationship between changes in the volume of the combustion chamber
and engine rotation to the temperature and compression pressure. The results of the study
are expected to provide insight into the ideal conditions for gasoline ignition in diesel
engines without the use of spark plugs, as well as contribute to efforts to optimize the use
of alternative fuels. The results of the experiment showed that variations in the volume of
the combustion chamber and engine rotation had a significant impact on the temperature
and compression pressure. The determination of the appropriate temperature and
compression pressure is expected to improve the efficiency and performance of diesel
engines when using gasoline fuel, thereby reducing operational costs and increasing the
flexibility of engine use in various applications. This research makes an important
contribution to the understanding of diesel engine modifications for gasoline fuel use,
which can be applied without testing exhaust emissions, with a focus on ideal temperature
and compression pressure.