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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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PENINGKATAN EFISIENSI DAN EFEKTIVITAS OPERASIONAL NELAYAN PADA PANTAI YANG CURAM DENGAN ALAT PEMINDAH PERAHU Tanaya, IGNA; Suartika, Made; Okariawan, IDK
Dinamika Teknik Mesin Vol 3, No 1 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Indonesia is known as an archipelago that has abundant marine resources, this should make Indonesia a wealthy and prosperous country. Unfortunately, these resources cannot be fully utilized because there is still a lack of support for technology and human resources in an effort to explore the existing marine resources. It is no wonder then many coastal communities are middle to lower living standards. Most of the fishermen have to pay people to help the process of shifting their boat, especially the fishermen on the steep coast so that it can reduce their revenue.This research aims to improve the operational productivity of fishermen on the steep coast by using an alternative concept, so that it reduces human labor as shifting assistant in the traditional shifting. Three alternative concepts has been designed to assist those shifting process, ie Tripod, Boat Train, and Boat Wheel. The designs was then selected to obtain the best concept. Concept selection was using the matrix assessment Analitycal Hierarchy Process (AHP) by assistance of data processing using Expert Choise 11 program furthermore method followed by using Pugh method to compare the boat shifting process between alternative concept and traditional shifting.Concept selection gives certain point for each concept, Tripod 0.3044 point, Boat Train 0.3998 point, and Boat Wheel 0.4385 point. It shows that boat wheel design selected as the best alternative concept. The comparison of total productivity between the best alternative concept and traditional shifting is 2.32 to 1.66. It means boat shifting process by using alternative concept design can be increase productivity counting 28%.
Pengaruh media pendingin dan waktu pada perlakuan pack carburizing-quenching baja karbon rendah SS400 Sujita, S.; Yudhyadi, I.G.N.K.; Zainuri, A.; Adhi, I.G.A.K.C.; Sutanto, R.
Dinamika Teknik Mesin Vol 11, No 2 (2021): 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.v11i2.471

Abstract

The SS400 low carbon steel is widely used in the agricultural equipment industry because of its specific properties, malleability good corrosion resistance, and high strength to weight ratio. However, according to several research results it has several weaknesses, low surface hardness, ductility and wear resistance. Therefore, it is necessary to improve its mechanical properties so that the agricultural equipment products produced are of better quality. The purpose of this study was to determine the effect of variations in time and cooling media in the pack carburizing-quenching treatment of SS400 steel specimens. The pack carburizing treatment was carried out at a temperature of 875 ºC, 90 minutes, the carburizing medium was a mixture of corncob charcoal powder and Picntada maxima shell powder, with a composition of 70%: 30%, followed by a quenching process with variations in time (1, 2, 3, 4). minutes) and cooling medium (water, oil SAE 40, cane molasses 10% and  cane molasses 30%. The results of the study showed that the time and cooling medium affected the surface hardness, ductility and microstructure of the specimens With 30% cane molasses cooling medium, quenching time of 4 minutes, the largest specimen absorbed impact energy (toughness) is 2.23 J/mm2. On the other hand, the lowest surface hardness number is 285 Kg/mm2.The increased ductility causes the cracking marks to disappear on the specimen surface. Based on observations with SEM, there is a decomposition of the martensite structure with coarser grain sizes. 
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 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.
ANALISA PENGARUH VARIASI SUSUNAN TERHADAP KEMAMPUAN UNJUK KERJA POMPA HYDRAM DITINJAU DARI ASPEK TINGGI TERJUNAN AIR Sutanto, Rudy; Wirawan, Made
Dinamika Teknik Mesin Vol 1, No 1 (2011): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Cultivation activities, both in the development of food crops, horticulture, livestock and plantations. Availability of water is a strategic factor. Specific areas adjacent to the water source or location are under the eyes water, water needs are less of a problem. However, the ground reality is not always flat; there is the hilly or bumpy. Land surface area is higher than the water source and the bumpy areas will have trouble getting a continuous supply of water. Therefore need to find an alternative to reduce the burden. One alternative is that hydram pump hydraulic work without using gasoline. Hydram pump was applied to a small debit them to raise water and drinking water needs of households. However, the use for irrigation in dry land agriculture that requires a large output flow is unknown. The method used in this research is to create models in the laboratory to simulate the independent variables of pressure (high falling) water flow while bound variables measured include debit and results of hydraulic pressure. The results of experiments that analyzed the correlation between independent variables and the variables are bound to get hydram pump efficiency. Pumps that were realized and tested in the laboratory have the following specifications: input = 1.5 inch diameter; output diameter = 0.5 inches; step on the valve piston waste = 5 mm; air tube diameter = 3 inches; air tube length = 24 cm ; material with galvanized pipe, construction of hydram pump consisting of the first arrangement of input - waste valves - compressor (ILK) and the second arrangement of input - compressor - waste valve (IKL). Pump of hydram with arrangement ILK has the ability to better performance when compared with the composition of IKL. Where pump of hydram with the composition of ILK has the best efficiency at 2.5 meters high waterfall with a debit enter 2.458 liters / sec discharge output capable of being lifted by a pump at 0087 liters / sec while the high lift or vertical height of the pump which is equal to 30 meters and efficiency pump of hydram which is equal to 13.6%.
Characterization of nanocellulose from banana stem fiber and its bionanocomposite as a thermal insulation material Syahrul, A.I.; Rosyidin, M.D.; Hidayat, S.; Khaerunisa, K.; Soraya, N.; Sari, N.H.; Syahrul, S.
Dinamika Teknik Mesin Vol 15, No 1 (2025): 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.v15i1.1009

Abstract

Nanocellulose has garnered significant attention due to its unique properties and potential in various applications, including thermal insulation. The abundant banana stems found in Lombok Island generate considerable waste that can be utilized as a raw material for nanocellulose. This research aims to characterization of nanocellulose derived from Kepok banana stems and its composites as thermal insulation in solar panels. Nanocellulose was produced using acid hydrolysis with sulfuric acid (H2SO4), and several treatments were carried out including Natrium hydroxide (NaOH), Sodium chlorite (NaClO2), Sulfuric acid (H­2SO4), The results show that nanocellulose from banana stems has a tensile strength of 13.374 MPa - 13.63 MPa. The addition of nanocellulose was found to increase the tensile strength of the composite reaching 13.374 up to 13.63 MPa, thermal conductivity 0,1692 up to 0,1940 W/mK and is quite heat resistant at a temperature of 200 °C. SEM photos of nanocellulose show surface roughness and produce interface strength between banana stem fiber nanocellulose and polyester resin. With solid bonding, good tensile strength, conductivity and thermal stability, bionancomposites from banana stem can be used as thermal insulator (backsheet) materials for solar panels.
RANCANGAN RUANG PENGERING BERBASIS ERGONOMI MENURUNKAN KELUHAN MUSKULOSKELETAL PERAJIN IKAN Susana, I Gede Bawa
Dinamika Teknik Mesin Vol 6, No 1 (2016): 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.v6i1.20

Abstract

With  traditional fish drying process,  most possible can cause an unhealthy  working posture , such as a squatting action.   As a consequence , worker will suffer a  musculoskeletal disorders because of not  ergonomic tools and bad working posture. Without ergonomics  working  procedures was found that  the average of   musculoskeletal complaints after working is 52.25 ± 1.03. To solve this ccomplaints, a drying chamber based ergonomics design was built in order to reduce musculoskeletal disorders. Dimensions of the drying chamber were based on anthropometric data of fish craftsmen and the material of drying chamber was by the participatory method. Test was performed on 20 samples and the result showed that the mean rate of  musculoskeletal complaints after working is 38.30 ± 1.30. The ergonomic based design for drying camber application can reduce  the musculoskeletal complaints up to 26.7%.
Pengujian variasi jumlah blade fiberglass kincir angin type horizontal untuk pemompa air garam Sifa, A.; Badruzzaman, B.; Endramawan, T.; Maolana, I.; Muhammad, A.R.
Dinamika Teknik Mesin Vol 8, No 2 (2018): 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.v8i2.208

Abstract

Faktor manajemen proses pembuatan garam perlu dipertimbangkan pemilihan lokasi dan musim sangat penting untuk mendukung upaya pengasinan air garam. Kincir angin yang dimiliki oleh petani masih menggunakan material kayu yang dibuat setiap tahun itu tidak efektif dilakukan dan bentuk kincir angin yang dibuat tidak sesuai dengan persyaratan tanpa mempertimbangkan kecepatan angin. Kontrol kecepatan pemompaan dipengaruhi oleh ukuran, berat dan variasi jumlah Blade serta ukuran kincir angin yang mempengaruhi produktivitas garam, untuk mengoptimalkan fungsi kincir angin pemompa air garam dengan mengubah material Blade pada kincir angin dengan menggunakan material komposit dan mengubah variasi jumlah Blade pada kincir angin dengan jumlah Blade 2,3,4 dan 6.Hasil pengujian menggunakan blower (fan) menunjukan bahwa pompa yang akan terangkat penuh hanya pada variasi jumlah Blade 3, 4 dan 6 dengan kecepatan 3,49 m/s. Sedangkan untuk hasil koefisien daya, semakin banyak jumlah Blade maka semakin besar efisiensi daya yang dihasilkan. Sehingga dari hasil simulasi dan uji lab maka penulis merekomendasikan variasi jumlah Blade 3,4 dan 6. Namun kenyataan pengujian di lab untuk variasi jumlah Blade 6 memerlukan kecepatan yang tinggi untuk awal memutarkan Blade, jadi Blade 4 yang paling direkomendasikan.
PENGARUH KADAR AIR AWAL KAYU JATI DAN SUHU CURING PEREKAT PADA KEKUATAN GESER SAMBUNGAN KAYU JATI (TECTONA GRANDIS) SECARA PEREKATAN Sugiman, Sugiman; Hayyi Nu’man, Abdul; Sulistyowati, Emmy Dyah
Dinamika Teknik Mesin Vol 4, No 2 (2014): 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.v4i2.58

Abstract

Adhesively wood-wood bonded joint has been widely used in structural applications, however because wood is a hygroscopic material that absorbed water from environment, hence the absorbed water affects the joints performance. The objective of the paper is to investigate water absorbtion and desorbtion behaviour and the combined effect of absorbed water into the wood before being bonded and adhesive curing temperature on the shear strength of teak wood joints. The initial water content in the wood was 0%, 37%, and 54%, while the curing temperature was a  room temperature for 24 hours, 50°C for 6 hours, and 100°C for 3 hours. The water absorbtion behaviour of teak wood deviate from the Fick's law, however the desorbtion tends to follow the Fick's law. Moreover the rate of absorbtion is higher than the rate of desorbtion. At the same curing temperature, the increase of water content decreases the shear strength of the joints; however the decrease was compensated by increasing the curing temperature. Curing at a high temperature (100 oC) improves the joints strength in all moisture content studied and the failure of the joints occurs at the wood.
Effect of motorcycle exhaust pipe temperature and electrical circuit on harvested dc power from thermoelectric generators Mirmanto, M.; Tira, H.S.; Pabriansyah, A.
Dinamika Teknik Mesin Vol 10, No 1 (2020): 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.v10i1.319

Abstract

The need for energy consumption nowadays becomes very important things, especially the need for electrical energy. Technology to convert heat into electricity directly can be realized using thermoelectric generators. To know the thermoelectric generator performance, this study performs an investigation of thermoelectric generator operated using motorcycle exhaust heat to generate DC power. Three identical thermoelectric generators model TE-MOD-5W5V-35S were used in this investigation. To generate different high temperatures the motorcycle was run at 1600 rpm, 2100 rpm, 3100 rpm. The circuits examined were series, parallel and combination of the two. All data were recorded using DAQ MX 9714 NI data logger that was connected to the PC using LabView program. The loads used in the current measurements were a thermoelectric cooler module model SP1848 and a fan 12 V - 0.13 A. Those two loads were installed in a parallel circuit. The results show that the tests without load produce the highest voltage, while the tests with the load result in the highest power. Increasing the temperature difference increases the power, and the parallel circuit results in the biggest power but the lowest voltage. The highest voltage of 3.3 V with series circuit was attained, and the highest power of 0.133 W with a parallel circuit was also obtained.
Analisa sifat mekanik material logam melalui pemodelan dan simulasi uji tarik berdasarkan metode elemen hingga Susanto, A.; Mahendra, M.T.; Andriyani, R.P.
Dinamika Teknik Mesin Vol 14, No 1 (2024): 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.v14i1.824

Abstract

Mechanical properties of material are attributes that should be known by engineers and product designers to determine the suitability of the structure being designed. One of the ways to determine the mechanical properties of a material is generally conducted by well-known tensile test. By the test, it will inform the elastic, plastic and fracture areas are known in the strain-stress diagram. Apart from that, the yield strength and maximum tensile strength can also be observed. The obstacle factor in experimentally tensile testing is the expensive costs, both for renting and procuring a tensile testing machine, which is called universal testing machine (UTM). This research aims to provide an alternative tensile test method, namely modeling and simulation techniques based on the finite element method (FEM). The workpiece material applied was ST37 Steel. This material is widely utilized in various types of industry, including the automotive, railway, and construction industries. The results show that the simulation can display all events that tensile tests may not be able to display experimentally, such as information on stress distribution and also elongation during the test. In addition, the mechanical properties of the ST37 material were obtained, including the yield strength of the material (yield point, Y) and the maximum tensile strength (ultimate tensile strength, σmax) which were 812.3 and 928.1 MPa, respectively.

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