cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ike Widyastuti
Contact Email
yazfara_k2@yahoo.com
Phone
-
Journal Mail Official
yazfara_k2@yahoo.com
Editorial Address
-
Location
Kota malang,
Jawa timur
INDONESIA
Transmisi
Published by Universitas Merdeka Malang
ISSN : 02163233     EISSN : 25802283     DOI : -
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering
Jurnal TRANSMISI dipublikasikan oleh Jurusan Teknik Mesin Universitas Merdeka Malang sebagai media diseminasi hasil penelitian dan karya ilmiah baik penelitian dasar maupun terapan di bidang teknik mesin. Berkala ilmiah ini memuat naskah dengan bidang kompetensi konversi energi, material (metalurgi), produksi dan manufaktur baik merupakan penelitian dasar ataupun rekayasa alat terapan.
Arjuna Subject : -
Articles 254 Documents
 21   22   23   24   25 
The Effectiveness of Centrifugal Pump Shaft Alignment Process Against Vibration Reduction Mulyadi, Rahmad; Darto, Darto; Iswantoko, Agus
TRANSMISI Vol 18, No 2 (2022): September 2022
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i2.9209

Abstract

Centrifugal pump is one of the most important components that is widely used by industry and functions to move liquids in the form of water or other liquid. One of the things that often happens on centrifugal pumps is the occurrence of high vibrations and abnormal sounds. High vibration in the pump is something that should be anticipated because it can cause damage to the bearings, seals, and shafts. If the pump continues to operate in this condition, it will also cause damage to other pump components and cause the pump to stop operating. Therefore, the condition of the pump must be monitored regularly to ensure that the pump can operate properly. One of the most frequently used methods to find out where high vibrations come from is to use the aptitude analyst application that will produce a unique vibrational spectrum. Vibration analysis is done by observing the amplitude and frequency of the vibration signal. Vibration spectrum analysis can detect pump damage without having to disassemble the equipment and can provide early warning before major damage occurs and takes a large repair cost. The results showed that the existence of high vibration at the 11-PA-7131A pump was caused by the parallel misalignment that occurred at the pump shaft and motor. This is indicated by the high amplitude of vibration on orders 1x, 2x and followed by the presence of amplitude on orders 3x. Vibration data retrieval after the alignment process on the pump shaft and motor also proves that there is a very significant change in vibration amplitude on orders 1x, 2x, and on order 3x. Overall vibration also experienced a very significant decrease so that the pump can be operated normally.
Isoconversional Analysis of Corn Silk Thermal Decomposition Fitting Model by Pyrolysis Process Himawan, Citrakara Upendra Sneha Bandhana Kusuma
TRANSMISI Vol 18, No 2 (2022): September 2022
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i2.9234

Abstract

The pyrolysis characteristics and kinetics of corn silk were studied through thermogravimetric analysis in the normal room temperature range of -900 oC under a nitrogen atmosphere at heating rates of 20, 30 and 40 oC/minute. The results show that the pyrolysis process of corn silk is divided into three stages which can be associated with the process of dehydration or loss of water at a temperature of 65-150 oC, followed by a second stage, namely the main devolatilization at a temperature range of 225-525 oC and the final stage, namely slow decomposition up to 900 oC. The activation energy in the active pyrolysis stage was calculated using the Arrhenius fitting model and the isoconventional model using the Flynn-Wall Ozawa model and the Vyazovkin model. The resulting activation energies from the Arrhenius calculations are in the range of 195-215 kJ/mol and Ea using the Flynn-Wall Ozawa and Vyazovkin free model calculations of 195,355 and 215,522 kJ/mol, respectively.
Utilization of Sunlight through Spot Charging Development Integrated Trash Can Purnomo, Purnomo; Tuwoso, Tuwoso; Suharmanto, Suharmanto
TRANSMISI Vol 18, No 2 (2022): September 2022
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i2.9474

Abstract

The city of Blitar is geographically located at the foot of Mount Kelud. With these conditions, the city of Blitar has cool air with an average temperature of 24-340C, making it comfortable for studying and traveling. One of the cheap tours in Blitar City is Aloon-Aloon Blitar City which is located in the heart of Blitar City. Based on the results of observations, it was found that the level of awareness of visitors to environmental cleanliness was still low. This is shown by the large amount of garbage that is disposed of in any place, causing the beauty of Aloon-Aloon Blitar City to be affected. This study aims to develop appropriate technology that is able to increase visitor awareness of cleanliness. The research method used is development research by developing trash cans that are integrated with solar cell-based charging spots. The result obtained is the creation of a charging spot integrated with trash cans that can increase visitor awareness of waste. On the other hand, this solar cell-based charging spot technology is capable of charging 16 handphones with optimal duration of solar cell exposure to heat.
Design an Automatic Ph Controller Based on the Internet of Think Tuwoso Tuwoso; Purnomo Purnomo; Syamsul Hadi
TRANSMISI Vol 18, No 2 (2022): September 2022
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i2.9475

Abstract

The pH level in pond water has a very important role for the life of the fish in it. Moreover, the pond water functioned as a medium for fish cultivation. Appropriate pH levels have many benefits for fish farming. One of them is to increase fish productivity. This study aims to develop appropriate technology that can be applied to pond water. The result obtained is the creation of appropriate technology in the form of an automatic pH controller based on the Internet of Think (IoT). In simple terms, the workings of the automatic pH controller are that the pH sensor will detect levels of hydronium ion exchange (H+) in pool water so that the sensor can determine the pH level in pool water, then data from the sensor will be received by Arduino and will be processed so that it can be visualized on the display. LCD. The existence of this technology is able to make catfish grow optimally, so that freshwater aquaculture ponds become more productive.
Investigation of Thermophysical and Rheological Properties of Scallop Shell Powder/SAE 5w-30 Nanolubricant Purwanto, Muhammad Rizky; Puspitasari, Poppy; Permanasari, Avita Ayu; Abdullah, Muhammad Ilman Hakimi Chua
TRANSMISI Vol 19, No 1 (2023): March 2023
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i1.9638

Abstract

Nanolubricant is a type of nano fluid that contains base-fluid lubricant (water or oil) and nanoparticles. This study aims to analyze the thermophysical and rheological properties of lubricants with the addition of nanoparticles. The nanoparticles used are Calcium Carbonate (CaCO3) made from scallop shell waste. The base lubricant is SAE 5W-30 synthetic oil which has quite good performance. Synthesis of Calcium Carbonate (CaCO3) into SAE 5W-30 lubricant uses a two-step method. Variations in the addition of volume fraction of Calcium Carbonate (CaCO3) of 0.05%, 0.10%, 0.15%. Furthermore, the nanolubricant was tested for its thermophysical properties which included thermal conductivity, specific heat, density, viscosity, and sedimentation. After that, the rheology of the nanolubricant can be known from the viscosity data by calculating the shear rate and shear stress.
Identification of Thermophysical and Rheological Properties of SAE 5w-30 with Addition of Hexagonal Boron Nitride Reyhandi Katon Asmoro; Poppy Puspitasari; Avita Ayu Permanasari; Muhammad Ilman Hakimi Chua Abdullah
TRANSMISI Vol 19, No 1 (2023): March 2023
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i1.9639

Abstract

This research uses SAE 5W-30 lubricant base material with the addition of Hexagonal Boron Nitride (hBN) nanoparticle additives. This study aims to analyze the thermophysical and rheological properties of lubricants with the addition of nanoparticles. The method in this study uses a two-step method where nanoparticles are first prepared separately, then added with nanoparticles with varying volume fractions of 0.05%, 0.10%, 0.15% into the base fluid as a processing step. The next step is the stirring process using a magnetic stirrer, and ultrasonic homogenizer process.  Furthermore, the nanolubricant was tested for thermophysical properties including viscosity, density, thermal conductivity, and sedimentation.
Mechanical Properties of Composites Combination of Areca Fronds with Epoxy Resin Joni Joni; Enos Tambing
TRANSMISI Vol 19, No 1 (2023): March 2023
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i1.9618

Abstract

Technological advances in material aspects are always increasing, and one of the applications of natural fibers as a matrix in composite materials has begun to be widely used. Composite materials have mechanical properties that are sturdy, corrosion resistant, and concise, and can be used as a substitute for metal materials. Areca palm fronds are part of the areca palm tree which are widely used as storage media because they are durable and weather resistant. The aim of this study was to determine the tensile strength of areca nut composites without alkali treatment combined with epoxy. Tensile test based on ASTM D3039 test standard. The test results showed a maximum tensile strength of 4839886.67 N/m2 or 4.84 MPa, and a modulus of elasticity of 114148270.5 N/m2 or 114.15 MPa. According to the JIS A 5905 standard, it meets the specified requirements, namely elastic strength of 32 MPa and tensile strength of 0.4 MPa.
Crack Simulation on Diesel Engine Crankshaft using Finite Element Method Pradhana Kurniawan; Yusuf Prasetyo Gemilang
TRANSMISI Vol 19, No 1 (2023): March 2023
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i1.9800

Abstract

Crankshaft is a machine component that has a high stress value and failure usually occurs due to fatigue. Crankshaft in diesel engines found in certain vehicles that have performance specifications of 140 cv (cheveaux vapeur) at engine speed of 4000 rpm and displacement of 1963m3. Crankshaft failed on the crankpin and main bearing cap. The failure occurred after this vehicle traveled 180,000 km in use and through repairs during 8 years of use. Failure of the crankshaft is the root cause of internal damage to the combustion engine. Based on a simulation on a 4-cylinder diesel engine crankshaft using the finite element method using ANSYS Workbench 18.1 software, the equivalent (von mises) stress results are obtained with a maximum stress value of 445.72 MPa. Stress concentrations present in the crankshaft will result in the initiation of cracks which can propagate and result in fracture of the crankshaft. The stress concentration lies in the fillet web of the crankshaft where this part is very susceptible to cracking and fracture if the fillet design is not suitable or if an error occurs when the crankshaft is in the initial machining process. Stress concentrations at a certain point can also be caused by errors during the fabrication process.
Morphology Study of the Corrosion Rate on Weld Joint of Double Side Friction Stir Welding Aluminum Alloy AA6061 Simonne Andrean Crisdion; Poppy Puspitasari; Avita Ayu Permanasari; Danang Priyasudana; Diki Dwi Pramono; Majid Niaz Akhtar
TRANSMISI Vol 19, No 1 (2023): March 2023
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i1.9636

Abstract

DSFSW welding uses the rotating of a tool in the workpiece to create heat owing to friction between workpiece and tool to be connected. Corrosion is influenced by the presence of high heat owing to friction and a non-uniform cooling rate. The heat transforms the metal in the Heat Affected Zone (HAZ) and Weld Metal (WM) region, which can result in flaws such porosity, kissing bond, fractures, voids (from welding penetration), and flash as well as changes to the microstructure. Changes in the microstructure of welded joints can affect the resistance of welded joints to corrosion. The purpose of this study is to experimentally analyze the main causes of failure of AA6061 DSFSW joints based on welding temperature, weld defects, microstructure, corrosion rate and morphology of the corroded surface. Temperature testing using thermocouple to analyze the temperature, welding joint defects using DSLR camera and radiography test, microstructure using optical microscope, corrosion rate using AUTOLAB PGSTAT and morphology of corroded surface using SEM. The temperature analysis results show that the advancing side has a higher temperature than the retreating side, due to friction between the tool and base metal accompanied by the opposite welding direction. Visual inspection shows that all specimens and welding positions produce flash that is quite rough on the top (1G) and bottom (4G) surfaces and radiographic test results show incomplete fusion in 4 specimens. Microstructure shows a change in shape and size resulting in recrystallization in the form of fine grains. The highest corrosion rate is found in specimen B 1G welding position of 0.63856mm/year and the lowest corrosion rate in specimen A of 0.058567mm/year. SEM test results show the type of corrosion that occurs in DSFSW welding joints is pitting corrosion.
Effect of Cathode Distance, Anode and Electroplating Time on Aluminum Alloy Corrosion Rate Agus Dwi Putra; Dewi Izzatus Tsamroh; Yayi Febdia Pradani; Ratna Fajarwati Meditama; Ahmad Muflih
TRANSMISI Vol 19, No 1 (2023): March 2023
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i1.9572

Abstract

Aluminum foil is used more often than actual aluminum in everyday life because aluminum is actually quite unstable and is not suitable for securing heavy containing objects. For car wheels, aluminum is mixed with manganese and then hardened to withstand the load. Using aluminum alloys requires an electroplating process to increase corrosion resistance, decorative value and friction resistance. The purpose of this study was to determine the properties of anodized cathode aluminum alloy and the required coating time. In this study, a quantitative experiment used 20 samples. The results showed that there were defects in the aluminum alloy lattice, but not too significant. Different corrosion rate values were shown using electrolysis periods of 30 minutes and 60 minutes combined with anode-cathode distances of 5 cm, 10 cm and 15 cm. The group with 30 minutes of coating time and 5 cm anode-cathode distance had the highest corrosion rate (0.853 mm/year), while the group with 30 minutes of coating time and 10 cm anode-cathode distance had the lowest corrosion rate (0.610). The group with 60 minutes of coating time and 10 cm distance between the anode and cathode had the highest corrosion rate of 1,564 mm/year, while the group with 60 minutes of coating time and 15 cm distance had the lowest corrosion rate. The anode-cathode distance partially affects the corrosion rate of aluminum alloy electroplating. The smaller the distance between the anode and cathode, the higher the corrosion rate of the aluminum alloy. The longer the coating lasts, the higher the corrosive rate of the Al alloy.

Page 23 of 26 | Total Record : 254

 21   22   23   24   25 

Filter by Year

2005 2025


Reset
Filter By Issues
All Issue Vol. 21 No. 1 (2025): March (2025) Vol. 20 No. 2 (2024): September (2024) Vol 20, No 2 (2024): September (2024) Vol 20, No 1 (2024): March 2024 Vol 19, No 2 (2023): September 2023 Vol 19, No 1 (2023): March 2023 Vol 18, No 2 (2022): September 2022 Vol 18, No 1 (2022): March 2022 Vol 17, No 2 (2021): September 2021 Vol 17, No 1 (2021): March 2021 Vol 16, No 2 (2020): September 2020 Vol 16, No 1 (2020): March 2020 Vol 15, No 2 (2019): Edisi September 2019 Vol 15, No 1 (2019): Edisi Pebruari 2019 Vol 14, No 2 (2018): Edisi September 2018 Vol 14, No 1 (2018): Edisi Pebruari 2018 Vol 13, No 2 (2017): Edisi September 2017 Vol 13, No 1 (2017): Edisi Pebruari 2017 Vol 12, No 2 (2016): Edisi September 2016 Vol 12, No 1 (2016): Edisi Februari 2016 Vol 11, No 2 (2015): Edisi September 2015 Vol 11, No 1 (2015): Edisi Pebruari 2015 Vol 10, No 2 (2014): Edisi September 2014 Vol 10, No 1 (2014): Edisi Pebruari 2014 Vol 9, No 2 (2013): Edisi September 2013 Vol 9, No 1 (2013): Edisi Pebruari 2013 Vol 8, No 2 (2012): Edisi September 2012 Vol 7, No 1 (2011): Edisi Pebruari 2011 Vol 6, No 2 (2010): Edisi September 2010 Vol 6, No 1 (2010): Edisi Pebruari 2010 Vol 5, No 2 (2009): Edisi September 2009 Vol 5, No 1 (2009): Edisi Pebruari 2009 Vol 4, No 2 (2008): Edisi September 2008 Vol 4, No 1 (2008): Edisi Pebruari 2008 Vol 3, No 2 (2007): Edisi September 2007 Vol 3, No 1 (2007): Edisi Pebruari 2007 Vol 2, No 2 (2006): Edisi September 2006 Vol 2, No 1 (2006): Edisi Pebruari 2006 Vol 1, No 2 (2005): Edisi September 2005 Vol 1, No 1 (2005): Edisi Pebruari 2005 Vol 1, No 1 (2005): Jurnal Transmisi More Issue