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Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia
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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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Pengujian konsumsi daya baterai litium-ion pada sepeda motor listrik dengan variasi kemiringan lintasan Zain, A.T.; Suranto, D.D.; Irawan, A.; Karimah, C.N.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.620

Abstract

The development of electric vehicles in Indonesia, especially the BEV (Battery Electric Vehicle) type, has received serious attention and support from the government. This is evidenced by the issuance of Presidential Regulation Number 55 of 2019 concerning the acceleration of the Battery-Based Electric Motor Vehicle Program for Road Transportation. Electric vehicles designed and developed in this study use an on-wheel BLDC type electric motor, Li-Ion batteries and are equipped with a watt hour meter to monitor battery consumption. The results of testing the accuracy and precision of the watt hour meter show a good value. This is evidenced by the difference in the measurement value of the watt hour meter against the Avometer and the difference between each repetition of the data 5 times which is below 1 Volt and 1 Ampere. Other test results show that the track with a large slope will also experience a large voltage drop, namely 0.8 V at a slope of 100 and the maximum current flowing is 8.35 A. Meanwhile, when the slope of the track is 70 and 60, the battery voltage decreases and the current flowing respectively are 0.5 V and 8.12 A; as well as 0.2 V and 7.84 A.
Pengaruh variasi ketebalan saluran dan temperatur tuang terhadap fluiditas dan porositas hasil pengecoran kuningan pada pengecoran evaporatif Sugita, I.K.; Mara, M.; Priambadi, I.G.N.; Nuarsa, I.M.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.627

Abstract

The development of foundry technology continues to grow along with the increasingly complex needs for making products based on art and culture, one of which is sclupture. Evaporative casting based on non-permanent patterns made of polystyrene foam, with the advantage of precision casting results in complex shapes. The purpose of this study was to determine how variations in the pouring channel and pouring temperature affect the fluidity and porosity of brass castings in evaporative casting. Casting was carried out in castings with thicknesses of 1.5, 2, 3, 4, and 5 mm at pouring temperatures of 900°C, 950°C, and 1000°C using brass with a composition of Cu60% and Zn40%. The highest fluidity was found at a pattern density of 0.012 gr/cm3 at a pouring temperature of 1000°C with a flow length of 150 mm, while the lowest fluidity was obtained at a pattern density of 0.016 gr/cm3 at a pouring temperature of 900°C with a flow length of 13 mm. The results of scanning electron microscope (SEM) observations can be observed in spesimens with a density of polystyrene foam and a high casting temperature, an increase in the porosity formed.
Characteristics of ASTM A36 steel mechanical properties in pack carburizing with carburizing agent coconut shell charcoal and goat bone powder mixed Sujita, S.; Okariawan, I.D.K.; Hakim, L.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.619

Abstract

In the study the specimens were ASTM A36 low carbon steel pack  carburizing at 950℃, soaking time variations of 1, 2 and 3 hours. The carburizing agent is a mixture of coconut shell charcoal and goat bone powder (Capra aegagrus hircus). The size of the powder is 100 mesh, with variations in weight percentage between goat bone powder and coconut shell charcoal: 10%:90%, 20% : 80%, and 30% : 70%. Furthermore, the impact test, hardness, microstructure test and composition test were carried out, to determine the mechanical properties of the specimens. The results of the study show, soaking time and the composition of the carburizing agent affect the mechanical properties of the specimen The lowest impact toughness of 0,0576 joules/mm2 was obtained by the specimen at a soaking  time of 1 hour, the composition of the carburizing agent  (% wt goat bone powder: coconut shell charcoal) 20% : 80%. The highest surface hardness value was 854.734 Kg/mm2 at 3 hours soaking  time with 10%:90% carburizing media composition. The results of microstructure observations showed that in specimens treated with pack carburizing ferrite structure, pearlite turned into martensite.
Simulasi pemasangan sebuah model kerugian minor perubahan penampang di konektor loop mesin termoakustik Nurpatria, N.; Mirmanto, M.; Joniarta, I.W.; Padang, Y.A.; Susana, I.G.B.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.626

Abstract

A custom-designed thermoacoustic engine model has been created with the open source Delta EC simulation software. The specific design of the engine lies in the part of the heat exchanger, which allows it to receive heat from the hot gas stream resulting from the combustion of low grade biomass directly. The engine model can be coupled with a loudspeaker model that functions as a liner alternator, resulting in a simple power generator engine model. In this study, further simulations were carried out to increase the total efficiency of converting heat energy into electricity from the previous model. After that a model of minor loss of cross-sectional change was also added to the model. In a certain set of engine model parameter values without minor losses, the efficiency of converting heat energy to acoustic energy is 12.76%, equivalent to the amplification of acoustic energy by a regenerator of 33.26 W. The total efficiency of the engine model in converting heat energy into electrical energy is 10.53%. After the addition of a sub-program of minor losses due to the effect of one conical segment, there was an acoustic energy loss of 0.11 W. So that the efficiency of converting heat energy to acoustic energy was reduced by 0.01% to 12.75%. As a result, relatively small change occur in the total efficiency of the engine model.
Wind turbine optimization through optimal blade shape design for low wind speeds Tira, H.S.; Juliawan, Y.; Padang, Y.A.; Nurpatria, N.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.631

Abstract

Current electricity needs continue to rely on depleting fossil fuels such as fossil fuel and coal. The current government effort is to find non-fossil fuel alternative energy sources. Wind energy is one of the efforts to use ecologically friendly renewable alternative energy. Studies on the development and use of new and renewable energy are now undertaken. One of them is a series of research on the utilization of wind in numerous places of Indonesia through the construction of wind turbines. The blade that explicitly makes contact with the wind is one of the most critical sections of a wind turbine. The shape of the airfoil determines whether or not the blade is used. The focus of this research was to determine the optimal type of airfoil by comparing the coefficient of power (Cp), maximum power, and lowest power produced by various NACA (National Advisory Committee for Aeronautics) airfoils. NACA 4410, 4412, and 4415 airfoils were employed in this study.
Karakteristik tekan, bending dan morphology komposit mortar ringan diperkuat serat limbah tekstil Sari, N.H.; Suteja, S.; Catur, A.D.; Jaya, D.P.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.593

Abstract

The composites was made from a foam mortar matrix with Hydrolized protein reinforced textile waste fiber and the compressive strength, flexural strength and fracture morphology characteristics of the composite have been reported. This study investigated the effectiveness of adding textile fiber waste to lightweight mortar composites to improve the mechanical characteristics of the composites, reduce weight and minimize production costs of mortar composites. Mortar composites are fabricated by varying the volume fraction of textile waste fiber from 0 to 1.2% (of the composite density). The results revealed that the addition of textile waste fiber to the mortar composites decreased bending strength and bending modulus. The maximum compressive strength of the mortar composite was obtained at a volume fraction of 0.6% textile fiber waste (0.30167 MPa) and the lowest compressive strength of 0.149 MPa was owned by the mortar composite without textile fiber waste (composite BTA). This phenomenon caused by the fiber pull out, interface bond between textile waste fiber and matrix, as shown from the SEM photo. The addition of excess textile fiber waste from optimal conditions reduces mechanical performance due to increased voids in the mortar composite. However, this strategy helpful to reduce the weight of the concrete, reduce production costs and reduce textile waste.
Evaluasi sifat mekanik baja paduan rendah bedasarkan komposisi kimia dan suhu perlakuan panas menggunakan teknik exploratory data analysis (EDA) Leni, D.; Earnestly, F.; Sumiati, R.; Adriansyah, A.; Kusuma, Y.P.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.624

Abstract

This research aims to evaluate the relationship between the chemical composition of low alloy steel, temperature, and the mechanical properties of low alloy steel using Exploratory Data Analysis (EDA) techniques. The low alloy steel dataset is visualized using a correlation heat map, which shows a relationship between the mechanical properties of low alloy steel and its chemical composition and heat treatment temperature. Based on the results of the correlation heat map, an evaluation is carried out using scatterplots. The visualization results with scatterplots show a trend line indicating a linear relationship between YS and the elements V, Ni, and Mn, as well as a positive relationship between TS and V. In addition, there are determination coefficients (R²) that show how well the trend line can explain the variation of the data. The R² values obtained for V are 0.405, Ni is 0.226, Mn is 0.159, and Mo is 0.130, while El and RA have a positive correlation with temperature with R²values of 0.166 and 0.320, respectively. It can be concluded that the evaluation results using scatterplots and R² show that variations in chemical composition and heat treatment temperature affect the mechanical properties of low alloy steel. The correlations that occur between these variables can help in determining the pattern of the relationship and evaluating how well the trend line can explain the variation of the data. The use of correlation heat maps and scatter plots can help in decision-making and developing low-alloy steel materials that meet specific needs.
Pengaruh pulse current terhadap kekuatan bending implan micro-plate hasil dari proses edm die-sinking Kurniawan, Y.; Janua, J.; Sulaksono, B.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (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.v13i1.634

Abstract

Micro-plate implants are jaw implants in the form of straight plates. The need for micro-plate implants in Indonesia is quite high. Current micro-plate implants are fabricated using two machining processes, namely Wire Electrical Discharge Machining (wire-EDM) and micro-milling. These two processes are one of the reasons why the price of micro-plate implants in the market is expensive. One way to lower the price of implants is to shorten the implant manufacturing process. This research develops a process for manufacturing micro-plate implants using the EDM die-sinking process. The main objective of this study was to investigate the effect of pulse current on the bending strength of micro-plate implants resulting from the EDM die-sinking process. The micro-plate implant material uses commercially pure titanium (CP-Ti) with a thickness of 400 μm. The implant manufacturing process uses a pulse current of 6, 9 and 13 A. The electrode material uses graphite. The results showed that the bending strength of micro-plate implants increased with an increase in pulse current. In addition, the increase in pulse current also causes the micro-plate implant to become soft. This is indicated by the elongation value of the micro-plate implant which increases as the pulse current increases.
Ketahanan balistik plat aluminum berlubang – komposit serat kevlar akibat impak proyektil bentuk hemispherical Fadly, M.S.
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.v13i2.653

Abstract

This study examines the influence of hole diameter on the ballistic resistance of deformable 9 mm full metal jacket (FMJ) calibre projectiles. Both experimental and numerical findings reveal an effective mechanism for overcoming perforated aluminium plate and kevlar fibre composite. The results from experiments and simulations demonstrate that a 3 mm hole diameter can impede the bullet's velocity by penetrating the first and second layers, consequently impacting the back plate that forms a bulge. A hole with a diameter of 5 mm causes projectiles to be perforated with a residual velocity of 20.041 m/s. The 3 mm hole induces a bending effect on the projectile, leading to a deviation from its original trajectory.
Pengaruh laju pemanasan dan variasi komposisi limbah paduan aluminium dengan Fly Ash Batubara terhadap kekerasan dan kekuatan tekan produk metalurgi serbuk Triadi, A.A.A.; Setyawan, P.D.; Kurniawan, I.K.
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.v13i2.682

Abstract

In this study, the manufacture of composites using the powder metallurgical method used two research variables, namely the rate of heating with variations in temperature with an increase of 3°C/minute, 5°C/minute and an increase of 7°C/minute.  The second variable is the mixing composition with variations in aluminium composition: Fly Ash is 100%:0%, 85%:15%, 80%:20% and 75%:25%.  The highest hardness results in this study were found in the 15% fly ash composition with a heating rate of 3°C/minute where the hardness value was 66.17 HRF while the lowest hardness value was found in the 0% fly ash composition with a heating rate.  of 7°C/min with a hardness value of 34.84 HRF.  For compressive strength test results.  the highest value was obtained in the 15% Fly Ash composition with a heating rate of 3°C/minute where the compressive strength value was 106.78 MPa, while the lowest compressive strength value was in the 0% fly ash composition with a heating speed of 7°C minutes where the value was 42.71 MPa.  From the hardness and compressive strength value, it can be concluded that the smaller the heating rate, the higher the hardness and compressive strength and the greater the SC mixing composition, the higher the hardness and compressive strength.

Page 25 of 46 | Total Record : 452

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