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Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin

DTM
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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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Perancangan bilah tipe taperless pada kincir angin: Studi kasus di PT. Lentera Bumi Nusantara Tasikmalaya N.H. Sari; W.G. Laksamana
Dinamika Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin
Publisher : Universitas Mataram

The studies related to new renewable energy are still being developed. This study aims to design taperless blades on wind turbines, case studies at PT. Lentera Bumi Nusantara. The wind speed conditions in Tasikmalaya which are considered relatively moderate can be designed efficiently by the appropriate wind characteristics in Tasikmalaya. Microsoft Excel, Qblade, Solid Works, and aerodynamic equations have been used to design a blade. The result shows that the blades have a solid, easy to make and affordable structure that can produce mechanical power at low wind speeds with a radius, diameter hub and chord length of 0.8 m, 0.19 m and 0.12 m, respectively. A twisting angle at the base and at the end of the blade are 11.14° and 7.17°. respectively. The conclusion of this design exhibited that the blade design with the same edge blade can be applied to moderate wind speeds to produce efficient, compact and affordable wind turbines with wind characteristics in Tasikmalaya, Indonesia.

Analysis of the effect of Chromium concentration (Cr) in welding electrodes on Carbon diffusion (C) at weld interface of ASTM A213 T22 material using metallographic and hardness testing methods Ruskandi, C.; Firmansyah, M.O.; Purwadi, W.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

In joinning superheater pipes ASTM A213 T22 and ASTM A213 T91 by welding there is carbon diffusion from the parent metal ASTM A213 T22 to the weld seam. According to Nemoto’s research, this could occur because the Cr concentration in ASTM A213 T22 metal is lower than the Cr concentration in the electrode. Diffusion of carbon can reduce the mechanical properties of the parent metal so that it can cause the formation of type IV weld crack. This study aims to analyze the effect of Cr concentration in electrodes on the carbon diffusion on the ASTM A213 T22 parent metal interface. The metal is welded using the AWS A5.5 standard electrodes with the difference in Cr content and then followed by post weld heattreatment at a temperature of 750oC for 5 hours. Metallographic and hardness test results showed that the electrode which have a greater Cr content than the parent metal caused carbon diffusion after heattreatment. Whereas those which have a lower Cr concentration than the parent metal did not cause carbon diffusion. The result proved that the diffusion of carbon on the weld of ASTM A213 T22 metal occured on an uphill basis, namely carbon diffusion occurs from lower Cr concentration to a higher Cr concentration metals. The result of this research are in line with the research of Darken and Nemoto where carbon diffusion occurs uphill due to changes in carbon chemical potential gradients caused by differences in concentration such as Cr or Si

Kekuatan Tarik Sambungan Paku keling tunggal pada Komposit Polypropylene Hibrida Laminasi Serat Goni/Gelas I.D.G Ary Subagia; A.H. Yuwono; I.G.A.K.C Adhi
Dinamika Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin
Publisher : Universitas Mataram

This research is to investigate the tensile strength of hybrid composite with lamination of goni and glass fiber reinforced on single rivet joint. Four variant of gony and glass fiber lamination on single lap-joint by rivet were manufactured and the gony fiber reinforced polypropylene composite [g5] and glass fiber reinforced polypropylene composite [G5] also produced for control. The specimen was fabricated through hot-press on the temperature of 200 oC as long as 60 min. The strength of the rivet joint has been tested on tension machine with load 5000 (N) and crosshead speeds is 1 mm/min. The research purpose is to investigate the tension strength of riveted single lap-joint on hybrid composites based on the fibers laminate variation. The tension test result of each variation of hybrid composites shown as follow; The average value of tension strength of hybrid composite (H1) shows the high value is 10,179 MPa with elastic of modulus is 3,867 (MPa). Meanwhile, the average value of hybrid composite H2, H3, and H4 have tension strength relative similar i.e; 7,88 (MPa), 7,792 (MPa), and 7,84 (MPa) that positioned between the composites [G5] and [g5]. The laminate stacking of fibers is influencing of the strength and elastic of modulus of hybrid composites.

Adsorbsi gas karbon dioksida dalam biogas dengan menggunakan endapan batu kapur Sutanto, R.; Mulyanto, A.; Wirawan, M.; Alit, I.B.; Nurchayati, N.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

With the depleting reserves of energy sources and fuel shortages that occur in Indonesia today, it is needed a cheap alternative energy sources and environmentally friendly, one of which is biogas. In this study biogas is generated from horse manure. The fermentation of horse manure can produce biogas with the largest component of the CH4 (49.5%) and CO2 (49.7%). The use of biogas as a fuel is still in the household scale and has not been used optimally. This is due to the biogas still containing high levels of CO2 so that it has low value of heat is produced. This research reduces the CO2 levels by using the Ca(OH)2 or limestone sedimentary, and then react with the CO2 to form CaCO3 and H2O. The variables studied are the influence of the flow rate of the biogas that CO2 absorbed and CH4. CO2 absorption made by passing the biogas with a variety of flow rates in the Ca(OH)2 at a certain concentration. Gas and Ca(OH)2 contact each other and the chemical reaction occurs. Every 2 minute interval of gas coming out of the absorber is detected by a biogas tester for analysis of absorbed CO2 and CH4 produced. The research results show that the average CO2 can be absorbed at all the variations of biogas flow rate (5 liter/min. 10 liter/min and 15 liter/min) produced CH4 at the biogas flow rate of 10 liter/min is 91%, then at the flow rate of 5 liter/min is 76.2% and at the flow rate of 15 liter/min is 72%.

Pengaruh model reflektor terhadap performa kolektor tabung dengan phase change material Muhammad Farobi Tsani; H. Sutjahjono; M. Darsin
Dinamika Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Energi merupakan kebutuhan primer bagi manusia yang hingga saat ini masih bersumber dari bahan bakar fosil. Pemanfaatan energi matahari sebagai energi alternatif mampu dimanfaatkan salahsatunya sebagai pemanas air. Hal ini menunjukkan bahwa perlu inovasi dalam peningkatan performa kolektor pemanas air dengan cara memodelkan reflektor dengan maksud suhu dan efisiensi yang dihasilkan kolektor pemanas air bisa meningkat. Tujuan penelitian ini untuk mengetahui pengaruh model reflektor terhadap performa kolektor tabung. Model reflektor yang digunakan pada penelitian ini yaitu bentuk U-ganda dan U-tunggal. Pengujian dilakukan dengan proses pemanasan pada kolektor selama 4 jam. Hasil penelitian menunjukkan bahwa kenaikan suhu air pada kolektor dengan reflektor U-ganda lebih cepat dibandingkan dengan kolektor dengan reflektor U-tunggal. Efisiensi tertinggi yang dihasilkan yaitu 33,1% pada kolektor dengan U-ganda, sedangkan pada U-tunggal efisiensi tertingginya yaitu 25,3%. Hal ini menunjukkan bahwa model reflektor U-ganda mampu meningkatkan performa kolektor lebih baik dibandingkan dengan reflektor U-tunggal dikarenakan intensitas radiasi yang dipantulkan reflektor U-ganda lebih besar dibandingkan U-tunggal.

Analisis unjuk kerja motor bensin 4 langkah 1 silinder 100 cc berbahan bakar etanol I Made Mara; I Made Adi Sayoga; I Made Nuarsa; Ida Bagus Alit; Kade Wiratama
Dinamika Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin
Publisher : Universitas Mataram

In line the population growth, technological developments and the increasing of vehicles, the necessary of fuel is increase. Therefore, the people try to find an alternative fuel that is ethanol as vehicle fuel. To increase the performance and efficiency to use of ethanol fuel in an engine is by varying the ignition timing.This research aimed to investigate the influence of ignition timing to torque, power and specific fuel consumption effective (SFCe) with 96% ethanol fuel. in an engine four stroke single cylinder 100 cc Honda Astrea Legenda. The ignition timing variation are 15˚, 20˚ and 25˚ before TDC and the engine speed are 1500, 2500, 3500, 4500, and 6000 rpm.The results show that the engine has better performance when the engine running on the ignition timing is advanced. The highest torque at 20˚ ignition time before TDC 0.868 kgf.m at 6000 rpm, the highest effective power at 20˚ ignition time before TDC of 7.272 ps at 6000 rpm, and the lowest SFCe at 20˚ ignition time before TDC is 0, 08 kg / PS.hour at 6000 rpm.

Investigasi simulasi numeris dan eksperimen proses springback berbentuk cup silider pada lembaran baja karbon Jis-G3141 Mulyanto, Bambang; Khaerudini, D.S.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Abstrak-Proses pembentukan lembaran baja karbon (sheet metal forming, SMF) adalah salah satu proses manufaktur yang umum digunakan dalam industri otomotif. Dibandingkan dengan pengecoran dan forging, pembentukan dengan lembaran metal lebih memberikan keuntungan, dari berat material yang lebih ringan dan variasi bentuk yang dapat dibuat. Salah satu kendala dalam proses SMF yaitu fenomana spring back yang dapat menyebabkan penyimpangan ukuran produk lembaran.Springback terjadi karena adanya gaya balik karena pengaruh elastisitas material lembaran baja karbon yang mengalami proses pembentukan. Ironing lembaran baja karbon JIS-G3141 dengan ketebalan 0,8 dan 1,0 mm dilakukan dengan tekanan 2,9 MPa dan penahan waktu 40 stroke per menit (1 stroke per menit ≈ 1,5 detik). Data eksperimen yang dilakukan dengan die tunggal pada material uji berbentuk Cup Silinder menunjukkan bahwa semakin kecil nilai ironing maka semakin besar nilai springback material. Oleh karena itu, fenomena springback dapat direduksi dengan perekayasaan proses ironing dengan rentang 0,15 mm.

Pengaruh rasio konsentrasi pada turbin air Savonius Ida Bagus Alit; Yesung Allo Padang; Mas'ud Mas'ud; Rudy Sutanto; I Gede Bawa Susana
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Irrigation channels have the potential to be used as power plants. Savonius water turbine can be developed because it has a simple construction and is suitable for low speed, according to the characteristics of the irrigation channel. The objectives of the research were to understand the influence of the installation of concentrator the performance of Savonius water turbine. Concentrator can steer the incoming water flow toward the turbine blades that generate positive moments, consequently, the generated power increases. Variations in the concentration ratios studied were 2: 1, 3: 1, and 4: 1. The results show that adding concentrators can increase torque, turbine power and power coefficient. The best performance of the Savonius water turbine showed is with the concentrator ratio of 3:1.

Studi pengaruh kadar mangan dan temperatur austenisasi terhadap struktur mikro dan sifat mekanik baja mangan Bahfie, Fathan; Aleiya, Zakhrofa; Milandia, Anistasia; Nurjaman, Fajar
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

High manganese steel or austenitic manganese steelcommonly are used in mining industries such as thecomponent in an excavator, hammer mill, crusher, andjaw crusher plates. Those components are the alloy caststeel with containing manganese (Mn) about 11-18%.The mechanical properties of austenitic manganesesteel are depending on the amount of manganese andcarbon. The austenitic steel has three dominantproperties, i.e. high hardness; good wear resistance, andhigh impact resistance. The objectives of this researchare investigating the effect of the composition ofmanganese and the austenitization temperature on themicrostructure and mechanical properties of austeniticmanganese steel. Each variation of manganesecomposition was 5.87%. 9.42% and 15.28%. It washeated at 950, 1000 and 1050oC for 60 minutes and thenquenched with water. The result showed that the highesthardness was 46 HRC where the composition ofmanganese and the austenitization temperature was5.87%. and 1050oC. The lowest hardness number was16.3 HRC where the content of manganese and thetemperature was 9.42%. and 1050oC. The results agreedwith the microstructure of the increase in carbides andthe composition of manganese increased too. For thewear resistance properties, the optimum one was 6.78 x10-6 mm3/m at the composition of manganese andtemperature of 5.87% and 1050oC.

Kinerja modul surya melalui variasi solar collector dan kecepatan angin Tira, Hendry Sakke; Natsir, Abdul; Putranto, Tommy
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Solar energy has been developed in wide areas because its potential to replace the current classic energy, fossil fuel. The advantages of solar energy are cheap and clean. To generate solar energy, photovoltaic is used. There are some factors affects the performance of photovoltaic. Some of them are the amount of light beam received and temperature of photovoltaic surface. This research was done to get better understanding of the factors on the photovoltaic performance. In order to reach the goal, two different solar reflector areas and wind velocity were applied. The wind source is coming from a blower while solar reflector was made from glass. The results showed that the watt peak, power point power maximum (PMPP), and output efficiency were increased by application of larger solar reflector and high wind velocity. Larger reflector application resulted in sun light can be focused directly to the solar panel therefore increasing the watt peak. Meanwhile, higher wind speed on the solar panel surface can reduce the solar panel surface temperature which lead to the improvement in maximum output efficiency.

Page 18 of 46 | Total Record : 452

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Mirmanto

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dinamikateknikmesin@gmail.com

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Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia

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Kota mataram,

Nusa tenggara barat

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Mirmanto

Contact Email dinamikateknikmesin@gmail.com

Phone +6282111738971

Journal Mail Official dinamikateknikmesin@gmail.com

Editorial Address Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia

Location Kota mataram, Nusa tenggara barat INDONESIA

Abstract

Abstract

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Abstract

Abstract

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Abstract

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Abstract

Abstract

Contact Name
Mirmanto

Contact Email
dinamikateknikmesin@gmail.com

Phone
+6282111738971

Journal Mail Official
dinamikateknikmesin@gmail.com

Editorial Address
Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia

Location
Kota mataram,

Nusa tenggara barat

INDONESIA