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INDONESIA
Traksi : Majalah Ilmiah Teknik Mesin
Published by Universitas Muhammadiyah Semarang
ISSN : 16933451     EISSN : 25799738     DOI : -
Core Subject : Science, Engineering,
Energy Engineering
TRAKSI (eISSN 2579-9738 / ISSN 1693-3451) adalah Majalah Ilmiah Teknik Mesin Universitas Muhammadiyah Semarang (UNIMUS) dengan cakupan bidang material teknik, konversi energi dan manjfaktur. Jurnal ini terbit 2 kali dalam satu tahun.
Arjuna Subject : -
Articles 220 Documents
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EFFECT OF WELDING CURRENT (SMAW) ON TENSILE STRENGTH AND MICROSTRUCTURE OF S45C STEEL Muhaemin Al Fikri; Iwan Nugraha Gusniar; Viktor Naubnome
TRAKSI Vol 22, No 1 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.1.2022.109-121

Abstract

Welding is a metal joining technique by partially melting the parent metal and filler metal with or without additional metal and producing a continuous connection. One type of welding that is often used is SMAW (Shieled Metal Arc Welding) welding. In SMAW welding, the influence of the current used plays an important role in welding. Because it affects the results of the strength of the welded joint. This research was conducted to determine the mechanical properties of tensile testing and microstructure under the influence of different currents. In this research, the test material is S45C steel and the current variation is 90 A, 110 A, and 120 A and the type of electrode used is E7016 LB57. The results obtained from the tensile test have the optimum value at 120 A with a tensile strength of 49.43 kg/mm while 110 A with a tensile strength of 43 kg/mm and 90 A with a tensile strength of 11.04 kg/mm. for testing the microstructure seen in the welded parts and the heat affected area. Keywords: variations in welding current, welding smaw, S45C, tensile strength.
INNOVATION OF CASSAVA CHOPPING MACHINE WITH A CAPACITY OF 15 KILOS PER HOUR BY ELECTRIC MOTOR Siswadi Siswadi
TRAKSI Vol 22, No 1 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.1.2022.94-108

Abstract

So far, cassava cutting is still done traditionally using simple tools and machines. There are several cassava chips entrepreneurs who use simple chopping machines but still do not meet their production capacity, it takes a long time, and the cassava cutting capacity is between 5 kg to 6 kg per hour. Based on the problems above, we aim to develop and innovate to change the cassava chopper system to be practical and efficient so that it can solve problems manually and be more time efficient. The purpose of this study, cassava chips entrepreneurs can use a cassava chopper machine with the result that the cassava cutting capacity increases. The result of this research is a cassava chopper machine with an electric motor specification of 0.5 pk. This chip machine uses a stainless steel blade plate with a diameter of 270 mm and a thickness of 5mm. The transmission system changes the rotation of the electric motor from 1400 rpm to 705 rpm, with components in the form of 2 pulleys, 76.2 mm and 156.2 mm in diameter and connected by a v-belt type A-70. The results of the performance test of the cassava chips machine are able to produce cassava chips 15 kg/hour.
TEMPORAL CHARACTERISTIC PSYCHOACOUSTIC ANALYSIS OF GENDING BAPANG MALANGAN PADEPOKAN MANGUN DHARMA VERSION Oeky Prasetio Widya Susanto; Akhmad Farid; Nurida Finahari
TRAKSI Vol 22, No 1 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.1.2022.80-93

Abstract

In the Malangan mask dance drama, the dance is accompanied by the strains of gending. Padepokan Mangun Darma Tumpang's version of Gending Bapang is the longest, according to the duration of the dance and the highest diversity of movements. This makes the Bapang dance and music version of the Mangun Darma hermitage a complete object of study, which can be used as a reference for other versions of Bapang research. This article aims to examine the temporal aspect of Bapang Malangan's music from the point of view of psychoacoustic studies. The temporal aspect is related to time-based vibration (sound) variables that are real time. Gending analysis is done using a sound processing application called Audacity. The research data will be converted into a temporal graph t (time) - A (amplitude). The temporal chart pattern will be analyzed for the strength and weakness of the voice, the dynamics of the sound, and the musical character. The results of the graphic analysis will be used as the basis for making a discussion about psychoacoustic gending. The results showed that the Bapang Malangan music version of Padepokan Mangun Dharma Tumpang Malang had a score of 4 which was the category of music therapy. Temporal characters represented by sound intensity have an average of 28.7 dB for the left sound and 30.1 dB for the right voice. This makes this gending does not include harmful noise.
DRUM BRAKE CALCULATION ON HONDA TIGER REVO 200 CC Bogie Reza Saputra; Kardiman .; Najmudin Fauji
TRAKSI Vol 22, No 2 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.2.2022.234-248

Abstract

The brake system is one of the components of the engine elements on the vehicle that can support the comfort and safety factor in driving. Brakes function to slow down or stop the movement of the wheels by means of friction. The kinetic energy lost from a moving object is usually converted into heat due to friction. The purpose of this report is to find out the functions, working principles and calculations as well as to know the things that must be considered in planning the drum brake. The method used to make this report is from direct observation of the object, literature study and guidance from the supervisor. From the drum brake specifications that have been described, we can find out the calculation steps needed to find the normal force on the rear wheels, the permissible frictional force, and the maximum use of the brakes. After several calculation steps, the torque on the brakes is 41.82kg.m, the gripping force on the drum brakes is 30.1 kg, the frictional force on the drum brakes is 14.45 kg, the braking capacity of the drum brakes is 2.023 kg. m, the number of braking contacts is 16856contacts. In one month it is assumed that 2500 times the braking contact will be obtained, so that the life of the drum brake pads is 6 months. The canvas can last longer or it can run out quickly depending on the user's usage and further research is needed if you want to get more accurate results because the different types of material and the difference in braking time will affect the lifespan of the brake pads.
DETERMINING COMPRESSION AND FUEL RATIOS FOR A MODIFIED 4-STROKE ENGINE Hedyan Restu Pratama
TRAKSI Vol 22, No 2 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.2.2022.294-306

Abstract

Motorcycles are one of the simple motorized vehicle transportation tools that are widely used by people today. The formulation of the problem in this research is what is the result of the compression ratio value that is obtained after the research and what is the compression value according to the machine. The purpose of this study was to determine the value of the compression ratio on a modified engine and to determine the fuel used in the compression ratio. The method used in this study is a literature study, calculating and determining the amount of compression. The results obtained from the calculation to get the compression ratio from 8.7 : 1 to 10.7 : 1 then the cutting height of the cylinder is 1.33mm, and To get the compression ratio from 10.7 : 1 to 11.3 : 1, then the cutting height cylinder is 0.31 mm. From the calculation of the Compression Ratio 1, 2, and 3, to achieve the final Compression Ratio value of 11.3: 1, a total block cutting of 1.64 mm is needed. And based on table B data, it can be seen that the compression ratio value of 11-12: 1 is using Pertamax Turbo or you can also use Shell V-Power and Performance 95. Therefore, it can be concluded that a 4-stroke motorcycle engine with a compression ratio of 11.3: 1 can use fuel with an octane rating of 95 with the type of fuel Pertamax Turbo, Shell V-Power, or Performace 95. With this compression ratio value, if you look at the ideal fuel table according to the compression ratio value, the octane value of the fuel increases to 95, and the fuel used is Pertamax Turbo, Shell V- Power, or Performance 95. The compression ratio value of 11.3 : 1 will be more in accordance with the specifications of the engine and also the needs of the user because the compression ratio value is not too high and not too low. Therefore this modified 4-stroke engine can be used for daily and long-distance purposes.
ANALYSIS OF THE EFFECT OF HOLE GEOMETRY ON THE CATALYST ON EXHAUST GAS EMISSIONS IN MOTORCYCLE EXHAUST Bintara Adi Putra; Oleh .; Farradina Choria Suci
TRAKSI Vol 22, No 2 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.2.2022.249-272

Abstract

The increasing number of motorized vehicles has a direct impact on air pollution caused by vehicle exhaust gases. A catalytic converter is a tool used to reduce exhaust emissions by reducing exhaust emissions. The catalyst is the main component in the catalytic converter which functions as a reducing agent. In this study, the material used as a catalyst is brass. This study aims to determine the effect of the geometry of the catalyst on the distribution of pressure, temperature, and velocity and to determine the exhaust gas emissions that come out of the combustion chamber into the environment after adding a catalyst, as well as to compare the results of testing exhaust emissions on a standard exhaust with an exhaust that has added a catalyst. The method used in this study is the simulation method using Solidwork 2019 software and experimental testing using agass analyzer. From experimental testing, the most optimal catalyst geometry will be sought to reduce exhaust gas emission levels such as CO, HC, and CO2 levels. The result of the largest pressure distribution occurs in the geometry of list IV and the smallest average pressure occurs in the standard exhaust The largest temperature distribution occurs in the geometry of the catalyst III standard exhaust. The largest average velocity distribution occurs in the standard exhaust and the smallest on the catalyst geometry IV. The results of the experimental test the most optimal percentage reduction in exhaust emissions occurred in the geometry of the alist IV which was compared with the results of the standard exhaust test with results of CO 15.153%, HC 19.713%, and CO2 9.275%.
PROPELLER SHAFT REDESIGN ON GRAN MAX 1.3 PICK UP VEHICLES Army Ardiyanto; Kardiman -; Iman Dirja
TRAKSI Vol 22, No 2 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.2.2022.175-191

Abstract

The car component that will be discussed is a Propeller Shaft. The Propeller Shaft that will be discussed is the Propeller Shaft for the Daihatsu Gran Max 1.3 Pick Up. The task of this machine element 1 aims to determine safe and good axle planning. The material used to design the shaft is carbon steel for machine construction of cold finished steel rods for the shaft with the symbol S55C with a tensile strength of 66 kg/mm2. The results of the shaft planning calculations show that the design power is 51, 744 kW, the torsional moment is 8399,775 kg.mm, the allowable stress is 5.5 kg/mm2 . The shear stress that occurs is 0.22269201 kg/mm2 , from the calculation results it can be seen that the shear stress that occurs is smaller than the allowable stress, so it can be concluded that the planned shaft size is quite safe.
CALCULATION OF CARBON EMISSIONS AND CAP AND TRADE/TAX SCHEMES AT CO-FIRING COAL POWER PLANTS Agus Noor Sidiq
TRAKSI Vol 22, No 2 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.2.2022.273-293

Abstract

The Implementation of co-firing on coal-fired power plants in Indonesia can reduce Greenhouse Gas (GHG) emissions that affect climate change. This reduction in Greenhouse Gas (GHG) emissions has the potential to avoid the carbon tax imposed on carbon-producing industries that exceed the upper limit of carbon emissions. The difference between the Carbon Emission Factor (????????????????2 ) in tons of CO2 e/MWh against the assigned Carbon Cap means the Carbon Economic Value (CEV) owned. CEV can be positive or negative depending on the difference between the results of the Carbon Cap. The opportunity for CEV to be traded depends on the amount of CEV that can be obtained from the co-firing. From this research, it was found that to get a good CEV, the minimum co-firing percentage is 7%. From the calculation results, the lowest value of ????????????????2 (????????????????) that can be achieved in the calculations in this paper is 0.993 tons/MWh at the co-firing percentage of 7%, while the maximum value of ????????????????2 (????????????) was 1.079 tons/MWh at 7% co-firing percentage. From this study, it was also found that the greater the percentage of co-firing used, the lower the value of ????????????????2 (????????????????) while the value of ????????????????2 (????????????) is getting  bigger.
NUMERICAL ANALYSIS OF THE EFFECT OF THE NUMBER OF TURBINE BLADES ON WIND TURBINE CHARACTERISTICS AXIS HORIZONTAL NACA 4412 Januar Ibrahim
TRAKSI Vol 22, No 2 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.2.2022.132-148

Abstract

The wind turbine is a device that can convert the kinetic energy in the wind into electrical energy. Wind turbine efficiency and performance depend on the design and angular shape of the wind turbine itself. The wind turbine used for analysis is a horizontal-axis wind turbine. This wind turbine performance analysis uses the Computational Fluid Dynamics (CFD) simulation method so that it can reduce the time and cost required. Aerodynamic simulations on airfoils used at the wind turbine angle are carried out to determine the aerodynamic characteristics of the airfoils used. Airfoil NACA 4412 is used as the basic form of the corner wind turbine. In conducting this research, computational simulation experiments on the design of the Horizontal Axis Wind Turbine NACA 4412 wind turbine by varying the number of turbine blades, 2 blades, 3 blades, and 4 blades and to find out which variant produces a greater torque and efficiency. Based on the simulation results, the 2-blade turbine gets the highest torque at TSR 6, which is 3,167 N/m with an efficiency of 53.3%, the 3-blade turbine gets the highest torque at TSR 5, which is 3,334 N/m with an efficiency of 46, 8% then the variation with the number of 4 blade blades gets the highest torque and efficiency among other variations, at TSR 5, which is 4.201 N/m with an efficiency of 58.9%.
ANALYSIS OF THE EFFECT OF FILLER WELDING ON ASTM A36 STEEL USING TIG WELDING AND SIMULATION WITH SOLIDWORK Andre Pradana; Viktor Noubnome; Oleh -
TRAKSI Vol 22, No 2 (2022): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.22.2.2022.192-212

Abstract

Welding is a technique that is widely used, such as in steel construction, the use of welding techniques can also save production costs. The extent of the use of this welding technique is due to buildings and machines that use jointing techniques to be lighter and simpler in the manufacturing process. TIG depends on the base metal to be welded. The filler rod is made of a metal whose composition is superior to that of the base metal. Because in the welding process there are some metal elements that are reduced or their structural transformations have an impact on reducing the mechanical properties of the metal. The purpose of this study was to determine the effect of filler on the microstructure of ASTM A36 steel welded joints and to determine the stress factor of safety on ASTM A36 steel using solid work software. The results obtained from the tensile testing process on the ER 70S -4 filler welding with an average strain of 2.2mm and a maximum tensile strength of 20.0 kg/mm2, and in the ER70S-6 filler welding the average tensile strain test results obtained 3 .1mm and an average maximum tensile strength of 28.1 kg/mm2. From the results of the Solidworks software simulation, it is known that the maximum tensile strength for specimens with filler ER 70S – 4 rods No. 1 is 21.71 Kg/mm2, rods No. 2 is 15.999 Kg/mm2, rods No. 3 is 22.12 Kg/mm2, for specimens with filler ER 70S – 6 rods No. 1 of 26.76 Kg/mm2, rods No. 2 of 36.63 Kg/mm2, rods No. 3 of 21.17 Kg/mm2 after calculating the error the maximum tensile strength test and simulation results obtained The biggest error value for ER 70S – 4 filler is 3.07% and for ER 70S – 6 filler is 2.97%. In this research, it can be found that ASTM A36 steel with ER 70S – 4 and ER 70S – 6 fillers is superior to using ER 70S – 6 filler from the higher tensile test results and the undoubted microstructure results in every part.

Page 18 of 22 | Total Record : 220

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