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Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia
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INDONESIA
Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
Published by Universitas Mataram
ISSN : 2088088X     EISSN : 25021729     DOI : https://doi.org/10.29303/dtm.v14i1
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Mechanical Engineering Physics
The Dinamika Teknik Mesin is a peer-reviewed academic journal which publishes originally research papers or simulation/computational articles in all aspect of Mechanical Engineering such as energy conversion, materials, design and production/ manufacturing. The Dinamika Teknik Mesin publishes in two issues per volume annually appearing in June and December. Due to administrative constraints, then starting in January 2018, the Dinamika Teknik Mesin publishes the volume and issue in January and July. However, starting in 2020, the Dinamika Teknik Mesin publishes issues in April and October due to the new administration.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 452 Documents
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Wear evaluation of palm oil and SAE 15W 40 engine lubricants with a ball-on-disk tester based on an improvised drilling machine Alfian, D.G.C.; Silitonga, D.J.; Machzumy, F.M.Al; Oktaberi, F.; Triawan, L.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.679

Abstract

This paper introduces a modified ball-on-disk test, utilizing a drilling machine, to investigate the tribological behavior of wear on a plate surface under various lubrication conditions. The tribometer, based on the ball-on-disc principle, employs an improvised bench-top drill press machine. Despite its simplicity, it effectively facilitates wear-track experiments using engine oil (SAE 15W 40) and palm oil as lubricants. Tests are conducted at room temperature, maintaining a constant load at 8.83 N and rotational speed of 180 rpm for 2 minutes per sample. Microscopic analysis of wear scars on the plate samples reveals distinct wear patterns and characteristics for each lubricant, with measurements taken at multiple positions for accuracy. The current work focuses exclusively on wear scar analysis, with findings indicating that engine oil outperforms the counterpart, displaying a smaller wear track width, hence superior lubrication and wear protection capabilities. In contrast, palm oil exhibits a larger wear track, implying limitations in friction reduction and material preservation. This work has demonstrated the practical use of the cost-effective tribometer device for conducting preliminary studies of lubricant wear reduction performance. The test outcomes render valuable insights for lubricant formulators, particularly at the early stage of laboratory-scale development.
Komparasi sifat mekanik antara komposit epoksi berpenguat abu dan sekam padi Martijanti, M.; Sutarno, S.; Sukwadi, R.; Wahyu, M.B.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.649

Abstract

Indonesia is an agricultural country because most of the population works in the agricultural sector. One of them is from agricultural products, namely rice. The milled rice produces rice and rice husks. Rice is used by the people of Indonesia as a staple food. Meanwhile, rice husks and ashes have not been utilized optimally. Seeing the great potential of rice husk and ash, efforts have been made to optimize the use of rice husk and ash as composite materials. The research aimed to obtain tensile strength, bending strength and porosity analysis of each composite using 230 mesh size rice husk particles or rice husk ash. The different volume fraction variations are 25% rice husk particles or its ashes and 75% epoxy matrix for the first variation, while for the second variation, it is 40% rice husk particles or its ashes and 55% epoxy matrix. The process of making composite materials was carried out using the hand lay-up and vacuum bag method with the test sample size according to the test standards used, namely ASTM D3039 for tensile strength testing and ASTM D790-61 for bending strength testing. The results of the mechanical properties test obtained the greatest tensile strength value in the epoxy composite reinforced with rice husk ash (40% wt) of 12.73 MPa and the greatest bending strength was in the epoxy composite reinforced with rice husk (40% wt) of 63.87 MPa. Preliminary characterization of rice husk and ash-reinforced epoxy composites met SNI standards.
Efek Penambahan Etanol Pada Bahan Bakar Pertamax Terhadap Performa Motor Satria F 150 Suanggana, D.; Radyantho, K.D.; Puspitasari, D.A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.702

Abstract

A type of renewable energy is ethanol. One of ethanol’s advantages is its very high octane value so that the combustion process in the combustion chamber can burn perfectly and reduce knocking. This study aims to analyze the effect of adding ethanol to Pertamax fuel on the performance of the satria F 150 motorcycle. The research method used is the experimental method, where the fuel tested is EX0 (Ethanol 0%: Pertamax 100%), EX5 (Ethanol 5%: Pertamax 95%), EX10 (Ethanol 10%: Pertamax 90%), EX15 (Ethanol 15%: Pertamax 85%) and EX20 (Ethanol 20%: Pertamax 80%). Based on the research results, the torque and power produced by EX0 fuel are 13.78 Nm and 10.73 kW, EX5 fuel is 13.63 Nm and 11.45 kW, EX10 is 15.18 Nm and 11.79 kW, EX15 is 15.45 Nm and 12.01 kW, and the EX20 is 15.20 Nm and 11.94 kW. The results for EX0, EX5, EX10, EX15, and E20 with the lowest specific fuel consumption were 0.110 kg/kWh for EX0, 0.104 kg/kWh for EX5, 0.081 kg/kWh for EX10, 0.073 kg/kWh for EX15, 0.099 kg/kWh for EX20. For the best performance, EX15 fuel is the best combination.
Karakteristik komposit sandwich dengan inti (core) open cell foam bambu berlubang P.D. Setyawan; S. Sugiman; S. Sinarep; H. Hilwan
Dinamika Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.654

Abstract

The sandwich composite used in this investigation has a bamboo open-cell foam core and a plywood skin. In this study, the density, flatwise compressive strength, flexural strength, and water absorption of sandwich composite materials will be determined. The volume proportion of fiber in the bamboo foam core was 15% in this investigation, and PVAc adhesive was employed. The open-cell foam core has a square-shaped hollow in the center and hole spacings of 30mm, 40mm, and 60mm. The tests included density testing (ASTM C271), flatwise compression testing (ASTM C365-05), flexural testing (ASTM C393), and water absorption testing (ASTM C272). According to the study's findings, compared to sandwich composites with core-opened cell foam without holes, sandwich composites with core-opened cell foam with holes have an average density, an average specific flatwise compressive strength, and an average specific bending strength that are smaller. The percentage of water absorption in the sandwich composite demonstrates the opposite. Comparing the sandwich composite with core-opened cell foam without holes (0.45 g/cm3) to the sandwich composite with core-opened cell foam with holes, the average density of the latter decreased by 6–13%. The decrease in the avarage specific flatwise compressive strength of the sandwich composite with a hollow core was 2-20% compared to the sandwich composite with an open-cell foam core without holes (41.22 MPa/cm3/gr). The average specific bending strength of the sandwich composite with the core opened cell foam with holes was reduced by 40–50% when compared to the sandwich composite with the core opened cell foam without holes (26.38 MPa/cm3/gr).
Analisis kinerja kincir air savonius poros vertikal dengan dua sudu pada beberapa variasi debit Duma, G.A.; Sule, L.; Hafid, H.D.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.656

Abstract

The Savonius waterwheel is a type of waterwheel with a vertical shaft rotation direction that can be used to convert the potential energy of water into energy of motion. This waterwheel works due to the difference in the force received at each blade. This test uses two semi-circular gutter blades which are paired oppositely to resemble the letter "S". The discharge variations given are opening valve 1 (damped 2), opening valve 2 (damped 1), and opening valve 3 (undamped). The results obtained show that opening valve 1 has the highest efficiency value of 18.97% with water power of 7.672 W and waterwheel power of 1.455 W.
Pengaruh muatan dan kecepatan kendaraan terhadap hasil emisi gas buang Gunawan, G.; Novianto, R.A.; Ayondya, R.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.683

Abstract

The government is promoting the enforcement of over-dimensional and over-loading vehicles. Overloaded vehicles usually require a lot of power so it affects the results of exhaust emissions. This study aims to determine the results of emission tests by providing variations in load and speed on gasoline motorized vehicles, namely the Daihatsu Granmax Pick-Up 1.5 produced in 2014. The method used is experimental to determine the effect of independent variables (variations of load and speed) on the dependent variable (emissions exhaust gas). Variations of payload used are 0 kg, 735 kg, and 1200 kg with variations in speed of 0 km/hour, 10 km/hour, 20 km/hour, 30 km/hour, and 40 km/hour. The result of the experiment is that when the vehicle is unladen, with variations in speed, the Carbon monoxide (CO) and Hydro Carbon (HC) levels will be higher with a CO value of 0.83% and HC 121 ppm at a speed of 40 km/hour. When the vehicle is loaded according to GVW and given a variety of speeds, CO and HC levels increase with a CO value of 1.43% and HC 362 ppm at a speed of 40 km/hour. Meanwhile, if the vehicle is given a variation of speed with overload, the CO value rises to 3.30% and HC becomes 516 ppm at a top speed of 40 km/hour. So it can be concluded that the load variable and speed variations affect exhaust emissions and the largest exhaust emissions occur in overloaded vehicles.
Penggunaan filter udara berbahan katun untuk meningkatkan efisiensi bahan bakar pada mesin bensin 1500cc Ardiyanta, A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.689

Abstract

Air filters are an important component of internal combustion engines, especially gasoline engines. The air filter is responsible for filtering dust and dirt particles. The character of the air filter must have good filtering without reducing significantly the quality of the amount of air sucked by the pistons. The purpose of this research, to examine the used of cotton air filters on the average fuel consumption of 1500cc gasoline engine. The research method used experimental research type, with data analysis using a paired sample t-test. Data collection was collected by road tests with variations of mileage, such as 8 km, 100 km, and 120 km. The results of this research found, that with cotton air filters, the average fuel consumption range at 80km was 17.2 km/litre, at 100 km range was 17.7 km/litre, and at 120 km range was 17.4 km/litre. This is better result, while using paper based air filter resulted 80 km at 16,7 km/l, 100 km at 17, km/l, and 120 km at 16,9 km/l. Based on the results of the research, this concluded that the use of cotton air filters affects the average fuel consumption. The use of cotton air filters can increase mileage so that fuel consumption is more efficient.
Design and optimization of simple atmospheric water generator using thermoelectric module Ajiwiguna, T.; Kirom, M.R.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.663

Abstract

Atmospheric water generator (AWG) is a device for producing water from humid air. The water is produced by cooling the air until below its dew point temperature. This study presents the optimization of a simple thermoelectric AWG device (S-TEAWG) for emergency purposes. The designed S-TEAWG consists of a thermoelectric module and condensation plate as a cooler and condensation surface, respectively. The plate is attached to the cold side of the thermoelectric module to enhance the contact surface area with the ambient air. The thermoelectric module with the dimension of 4 cm × 4 cm is operated at 12 V of voltage and 50 oC of hot side temperature. The device is installed vertically thus the condensates flow down naturally due to gravity. Various surface areas of vertical plates, from 0.01 m2 to 0.09 m2, are evaluated theoretically to obtain the maximum water production. The results show that the lower temperature of the vertical plate is achieved at a smaller surface area. However, the optimum surface area is obtained at 0.03 m2 with 60.9 ml/d of water production.
Uji tarik komposit serat pandan alam sebagai komponen material bahan pengganti alternatif aluminium Bawono, A.; Suroso, I.; Utami, N.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.583

Abstract

Seaplanes are aircraft that can land in the waters, this can be done because seaplanes have floaters. Floaters have a role so that the aircraft can float on the water. However, due to the fairly frequent interaction with water, it is necessary to have anti-corrosion treatment, this is because the use of metal as the basic material for making floaters is still dominant. Corrosion can be minimized by using composites as the constituent material. Making composites that can use fibres from nature can also be done such as the use of thorn pandanus fibres so that it will add more material value. In terms of mechanical strength, it is necessary to test to find out how strong the composite material of thorn pandan fibres is. In this study, composite manufacturing was carried out using the vacuum bagging method. The variation for fibre treatment is the duration of soaking time in 3 types of solutions, namely seawater, household wastewater, and river water. Material testing uses tensile tests. The results of tensile show that the relationship of immersion time to tensile strength in household wastewater is the best, all graphs tend to rise as the duration of immersion time increases.
Pengaruh variasi aliran udara terhadap optimasi daya panel surya Pido, R.; Rahmat, B.H.; Wawan, R.; Rianto, D.R.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.661

Abstract

Solar panels are one of the most popular renewable energy technologies in this modern era. To optimize the performance of solar panels, many studies have been conducted to understand and improve the factors that affect the power generated by solar panels. In this experiment, the aim is to analyze the temperature setting for cooling solar panels using variations in air velocity to increase the performance of solar panels. In this study, solar panels were tested with variations in fluid flow velocity of 6.0 m/s, 5.5 m/s, and 4.4 m/s with an inclination angle of 15˚ solar panels facing north. with 60-minute intervals. The air blower is combined with an anemometer to provide variable air velocity for panel cooling. From the results of solar panel testing the maximum power generated at a wind speed of 4.4 m/s is 47.40 W, the power generated at a wind speed of 5.5 m/s is 47.55 W, and the power generated at a wind speed of 6 .0 m/s the maximum power generated is 48.65 watts. While the maximum efficiency produced at a wind speed of 4.4 m/s is 4.23%, and the minimum efficiency produced is 1.87%, the average efficiency is 26.56%. at a wind speed of 5.5 m/s, the maximum efficiency produced is 44.6%, the minimum efficiency is 1.95%, and the average efficiency is 27.86%. at a wind speed of 6.0 m/s, the maximum efficiency produced is 4.79%, the minimum efficiency is 2.07%, and the average efficiency is 29.29%.

Page 26 of 46 | Total Record : 452

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