METAL : Jurnal Sistem Mekanik dan Termal
METAL: Jurnal Sistem Mekanik dan Termal translated as METAL: Journal of Systems in Mechanical and Thermal is a scholarly peer-reviewed journal published by Mechanical Engineering Department of Engineering Faculty at Universitas Andalas, Padang, Indonesia. The journal focused on the mechanics and thermal aspects of the mechanical engineering area, and accepted articles are in these subjects: Energy - Renewable energy - Green industry - Energy conversion Mechanical System Engineering - Solid body mechanics - Machine construction - Vibration and control - Mechatronics - Tribology Production System Manufacturing engineering - Product design and development - Production technology - Production logistics and transportation Materials Engineering - Material technology - Nanotechnology
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100 Documents
<![CDATA[Analisis Efisiensi Box Fermentasi Oncom Tahu dengan Sistem Arduino ]]>
<![CDATA[Meri Rahmi]]>;
<![CDATA[Agus Sifa]]>;
<![CDATA[Rachmatullah -]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 1 (2022): Jurnal Sistem Mekanik dan Termal (METAL) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.6.1.31-37.2022
<![CDATA[Tofu dregs are a by-product in the process of making tofu in solid form and are obtained from squeezed soybean pulp. Tofu pulp still has a relatively high protein content because in the process of making tofu not all protein content is extracted, especially when using a simple and traditional milling process. One of the products from tofu dregs is tofu oncom. Oncom is a fermented food product typical of West Java. Oncom is a processed food derived from soybeans, its nutritional value is almost the same as tofu and tempe. It contains protein and fat that are good for the body. The process of making tofu oncom is almost the same as making tempe oncom, However, its utilization is still small in the industry compared to its abundant production. So, a lot of it is still wasted. In addition, the process of making tofu oncom is still very simple and uses traditional methods by relying on natural conditions and this takes longer. For this reason, with better methods and technology, a fermentation box is made for the manufacture of tofu oncom. The method used is a heater and temperature and humidity sensors to speed up the fermentation process. In addition, the use of aluminum material, in order to ensure that oncom tofu is more hygienic so that it can become one of the traditional products that can compete in a better market. The results of this fermentation box indicate that the processing time for making tofu oncom is faster from 2 days (± 24 hours) to 1 day (± 14 hours). Reduction of processing time by about 58% so that productivity also increases to above 50% with a box capacity of up to 50 kg of tofu dregs.]]>
<![CDATA[Kajian Perancangan dan Evaluasi PLTMH Jorong Patamuan Kabupaten Pasaman dalam Mengatasi Kekurangan Listrik Pedesaan ]]>
<![CDATA[N Nusyirwan]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 1, No 1 (2017): Volume 1, No 1 (2017) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.1.1.40-46.2017
<![CDATA[Electrical energy supply which is not evenly distributed throughout the territory of Indonesia is mainly due to the width of the area the limitation on the budget. This condition has enforcing the rural residents to make their own electric energy generation. The discovery of a compact electric generator with control equipment that is reliable in a variety of sizes and power capacities has increasing the development of small size hydro electric power plants. One of the technology challenges for this power plant is to design a power plant with the existing water resources and equipment available on the market. Base on the preliminaries study in MHP Jorong Patamuan, it is found that the cross-flow turbines with a maximum power of 10 Kw is more appropriate for the electrical generator. The Maximum head for this micro hydro generator is 8 meters and the net loss of 0.4 m. The main channel is composed of a trunk made of concrete channels open with a size of 40 x 40 x 40 cm and a pipeline for rapid pipeline with a length of 28 m using the pipe 8 inches or 20 cm. Generator been Generator one Phase with 10 Kw power. There are constraints in this PLMH operation, which is the state annual river discharge decreased during July and August due to the long dry season so that the water flow is only 0.08 m3 / s, far below the planned discharge 0.2252 m3 / s for the power wat 3000 output only approximately 1/3 of the nominal power 10000 watt than planned.]]>
<![CDATA[Evaluasi Frame Sepeda saat Tabrakan Dengan Metode Ekplisit Elemen Hingga ]]>
<![CDATA[Ardi Wiranata]]>;
<![CDATA[Abdul Arief]]>;
<![CDATA[Heru Santoso Budi Rochardjo]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 3, No 1 (2019) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.3.1.29-39.2019
<![CDATA[In this paper, numerical method of crash impact by using explicit dynamic model was used to evaluate the bike frame design. Frontal impact simulation model was carried out to understand the characteristics of energy absorption, stress distribution and deformation of the bike frame. Carbon fiber T300 composite with elasticity modulus 129,79 GPa and overall frame weight is 1,8 kg was used in this simulation as material properties. Hashin damage criteria was used in this numerical analysis since this criteria was widely used to assess composite material damage simulation. In this study Head Tube angle (HTA) and Top Tube Angle (TTA) was modified. The modified HTA was varied from 69O to 76O and TTA was 70O to 86O. This modification was based on the original frame design which the HTA and TTA are 71.5O and 74O respectively. This modification was aimed to find the effect of HTA and TTA modification to energy absorption and stress distribution in the bike frame design. Simulation result shows that TTA and HTA modification affect the energy absorption of the bike frame. The smaller the energy absorption of the bike frame shows that the frame has poor quality of stress distribution.]]>
<![CDATA[Analisis Geometris Sistem Kendali Elevator Pesawat Udara N219 ]]>
<![CDATA[Lenny Iryani]]>;
<![CDATA[Arie S Ramadhan]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 5, No 2 (2021): Jurnal Sistem Mekanik dan Termal (METAL) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.5.2.93-97.2021
<![CDATA[Flight control of elevator are used to control the attitude of the aircraft in pitching configuration. The system of this flight control are controlled by the force given by a pilot so that the aircraft will move to the desired pitch condition. In this research the force that should be inputted by a pilot easily and smooth are analyze. The study of this analysis was using N219 airplane designed by PT. Dirgantara Indonesia. The preliminary design of the force that should be inputted by a pilot are in 495 kN.mm. The result of the study are shown that the length of the arm in the elevator system give Margin of Safety in a range of 3 – 4.]]>
<![CDATA[Reduksi Gaya Drag Silinder Sirkular dengan Penambahan Square Disturbance Body Melalui Simulasi Numerik 2D Unsteady-RANS pada Reynolds Number 34800 ]]>
<![CDATA[Rina Rina]]>;
<![CDATA[Ruzita Sumiati]]>;
<![CDATA[Adriansyah Adriansyah]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.2.2.43-49.2018
<![CDATA[Circular cylinder has a strong adverse pressure gradient. When a fluid flows around the circular cylinder, it will produce aerodynamics force. One of them is the drag force which strong enough. Hence, control of flow need to reduce the drag force with placed a disturbance body on the upstream side. The purpose of this study is to compare and complement the experimental research of drag reduction that has been done before. The aerodynamics characteristics of the disturbance body and cylinder are modelled in two dimensions Unsteady-RANS by using fluent with turbulent flow. It is found that the mean drag and the lift fluctuation of the cylinder can be reduced by the upstream disturbance body with the s/D = 0.107 (here s and D are side length of the disturbance body and the diameter of cylinder, respectively). The position of the disturbance body is varied at (α) 20º, 30º, 40º, 50º and 60º with a gap distance (δ = 0.4mm). Reynolds number based on cylinder diameter ReD = 3.48x104. Fluid interaction between circular cylinder with two disturbance body can increase boundary layer transition from laminer to turbulent to produce small drag. It is found that the characteristics of the flow significantly depend on the position of disturbance body. The optimum condition for the drag force reduction is at the angle α = 30º about 53 %.]]>
<![CDATA[Rancang Bangun Mesin Pemanas Akrilik Tipe Turbular Skala Industri Kecil ]]>
<![CDATA[Noviyanti Nugraha]]>;
<![CDATA[M. Khenbakti]]>;
<![CDATA[Rakha Rakha]]>;
<![CDATA[Teguh Siswanto]]>;
<![CDATA[Muraz Muraz]]>;
<![CDATA[Rizkia Munajat]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 5, No 1 (2021): Jurnal Sistem Mekanik dan Termal (METAL) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.5.1.23-32.2021
<![CDATA[Acrylic is a material that is often used as a substitute for glass because it has the advantage that it is not easily broken and is lighter than glass. One of the processes of making objects made from acrylic is heating. The heating process that has been carried out by small industries is usually acrylic material heated manually by spraying fire from a gas-tube or using a small heater so that the size of acrylic that can be heated is limited, both in terms of length and thickness. The purpose of this research is to design and manufacture an acrylic heating machine that can be used up to a dimension of 600 mm wide and unlimited in length, and can heat up to a thickness of 10 mm with a continuous heating process and is relatively short. The design and manufacture includes the design of the heating system, the selection of the heater to be used, the design and manufacture of the acrylic table, the drive system and the frame. The test parameters include the maximum heating temperature, the acrylic bending temperature and the heating time. The result of the research is an acrylic heating machine that uses three straight turbular heaters with a 300 Watt heater each, capable of heating acrylic with a thickness of up to 10 mm as the initial process for the bending stage, at a heating dimension of 60 cm wide and unlimited in length. The suitable heating temperature for the bending process is 150oC. The average heating time for the thickness 3mm is 91.5 seconds (1.5 minutes), 5mm (2.9 minutes) is 174.2 seconds and 10 mm is 451.3 seconds (7.5 minutes).]]>
<![CDATA[Kaji Eksperimental Sifat Mekanik Pipa Material Komposit Polyester Berpenguat Serat Daun Nanas ]]>
<![CDATA[Hendery Dahlan]]>;
<![CDATA[Islahuddin Islahuddin]]>;
<![CDATA[Meifal Rusli]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 1 (2018) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.2.1.15-20.2018
<![CDATA[Bending stress of a pipe made of natural fiber composite is investigated in this paper. Pineapple leaf which is very potential to be developed as an alternative reinforcement in composite materials is used for this investigation. The effects of layer number and fiber orientation to the bending strength and elastic modulus are investigated. The experiments are conducted based on ASTM D790-03. The results show that the composite pipe with two layers and fiber orientation of 90º/-90º has the highest bending strength. On other hand, the composite material having one layer and fiber orientation of 45º/-45º produce the highest elastic modulus.]]>
<![CDATA[Pemanfaatan Energi Putaran Roda Sepeda Motor untuk Menghasilkan Energi Listrik ]]>
<![CDATA[Jhon Malta]]>;
<![CDATA[Fuadi Mustafa]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 4, No 2 (2020): Jurnal Sistem Mekanik dan Termal (METAL) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.4.2.62-69.2020
<![CDATA[This research is conducted to convert the rotating energy of the wheel of a motorcycle as an alternative electricity power plant. The rotating wheel contacts a roller and then transmitted by belt to the generator. The generator generates the electric current and then converted using an inverter to produce alternating current (AC) with the voltage 220 volts. A battery is used to stabilize the output voltage. Based on the reference, the needed energy for the cell to charge is 13.0 volts to 13.9 volts. This tool can produce this voltage with 170 – 180 rpm of the wheel rotation, which is obtained in the gear 2 of the motorcycle Honda Supra X 125R.]]>
<![CDATA[Rancang Bangun Mesin CNC 2 Sumbu ]]>
<![CDATA[Firman Ridwan]]>;
<![CDATA[Arif Novriheldi]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 1, No 2 (2017): Jurnal Sistem Mekanik dan Termal (METAL) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.1.2.91-98.2017
<![CDATA[Nowadays, high accuracy and precision of products have become a major requirement by the manufacturer. It can only be achieved by using a controlled machine such as CNC machine. On the other hand, most of home industries have conventional production machines and manually operated. Unavailable precisian machines cause difficulties to achieve such products. In most cases, capability of home industries to buy high cost machines is limited. Therefore, it is then to be the backdrop of designing a simple construction and its control system for a low cost CNC plasma cutting machine. A low cost CNC plasma cutting machine was designed and expected to be realible in controlling the movement of the axis preciselly during cutting process. The result of this study showed that the machine was capable of achieving the following levels of precision up to 0.05 mm for the X-axis with a deviation of 0.04 mm. Meanwhile the Y axis was obtained up to 0.08 mm with a deviation of 0.057. The results indicate that the achieved accuracy is higher compared to the manual cutting.]]>
<![CDATA[Rancang Bangun Generator HHO untuk Aplikasi pada Engine 1108 Cm3 ]]>
<![CDATA[Rino Sukma]]>;
<![CDATA[Nofriyandi Nofriyandi]]>;
<![CDATA[Hanif Hanif]]>;
<![CDATA[Dian Wahyu]]>;
<![CDATA[Andriyanto Andriyanto]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 3, No 2 (2019) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.3.2.87-93.2019
<![CDATA[Electrolysis is a method used to describe the composition of air. electrolysis converts air bonds (H2O) into its constituent compounds flammable Hydrogen and Oksigen which help the combustion process. Water electrolytic devices are called HHO generators, HHO generators use pure water electrolysis, the results of the meeting between H2 and O2 will be used as alternative fuels in meeting renewable energy needs. This research uses a HHO generator. Testing the performance of the HHO generator is done experimentally on a laboratory scale. The first stage is making a dry type HHO generator using SS316L plate. The size of the plate is 70 mm x 70 mm, the center of the plate is punched Ø 12 mm, the top and the bottom of the plate are perforated Ø 10 mm. The HHO generator consists of 5 cells and 4 neutral plates for each cell by agreeing 5, 7 and 9 grams of KOH for 1 liter of distilled water. The results of the production of HHO gas produces a large amount of H2 and O2 which flows in units of minutes at a volume of 500 ml. HHO gas production parameters will depend on current, power and efficiency will increase from each of the above variables. Measurements use special measurement tools to distinguish which are quite significant]]>
