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
Articles
143 Documents
<![CDATA[Studi Experimental Terhadap Perpindahan Kalor Pada Tumbukan Multiple Droplets Dengan Variasi Frekuensi Tetesan ]]>
<![CDATA[Indro Pranoto]]>;
<![CDATA[Dannys Arif Kusuma]]>;
<![CDATA[Teguh Wibowo]]>;
<![CDATA[Fauzun Fauzun]]>;
<![CDATA[Deendarlianto Deendarlianto]]>;
<![CDATA[Indarto Indarto]]>
<![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.2.2.26-35.2018
<![CDATA[The effect of drop frequencies and surface temperature on the maximum spreading ratio, heat transfer rate and heat transfer coefficient of convection have been studied experimentally. The experiments were carried out by investigating different values of drop frequencies at 250, 400 and 600 drops/minute. The surface material of stainless steel with a temperature range of 120°C to 200°C was used in the study. An image processing technique was used to measure the diameter of droplets that were captured by using a high-speed camera. The results of the study show that by increasing frequency of drops has improved significantly the maximum spreading ratio, heat transfer rate and heat transfer coefficient of convection. The results also shown that by increasing the drop frequency has increased accordingly the droplet contact with the surface. It was found that, at higher surface temperature has contributed to the increase of the heat transfer rate and convection heat transfer coefficient. This study suggest that the peak and wetting limit conditions has occurred at the surface temperature of 180°C.]]>
<![CDATA[Analisis tegangan pada struktur mesin pencacah plastik menggunakan metode elemen hingga (MEH) dan uji kerja mesin pencacah plastik ]]>
<![CDATA[Hendra Hendra]]>;
<![CDATA[A. Indriani]]>;
<![CDATA[Hernadewita Hernadewita]]>;
<![CDATA[A. Mardian]]>;
<![CDATA[N. Kholik]]>;
<![CDATA[Rispandi Rispandi]]>;
<![CDATA[Y. Suhartini]]>
<![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.5.1.9-16.2021
<![CDATA[Plastic is a non-biodegradable material. Plastic waste must be processed using processing machines or other processing methods such as processing plastic into fuel and other forms of products. Plastic waste processing machines are available in plastic shredding and injection machines. The performance of plastic shredding and injection machines depends on the plastic waste treated, the shape of the cutting edge, the structural strength of the plastic shredding and injection machines and others. The strength of plastic shredding and injection machines can be calculated by means of simulation using the finite element method (FEM). This method will save costs, selection of materials and cutting edge shapes quickly and easily and soon. In this study, FEM was used to simulate the design strength of a plastic shredding and injection machines in the form of pressure and displacement, followed by the manufacture of plastic shredding and injection machines and the work test of plastic shredding and injection machines. From the simulation results using FEM, the maximum voltage and structural displacement of plastic cutting and injection machine is 4.57 MPa and 0.031 mm and work test showed the machine can cut 800 grams of plastic waste in 278 seconds with motor rotation of 176 rpm, current 6.8 A, active force. Electrical load 1214.4 watts and torque 44.74 lb.ft.]]>
<![CDATA[Pengaruh Parameter Pemotongan dan Variasi Susunan Serat Terhadap Terbentuknya Delaminasi pada Proses Menggurdi Material Komposit Serat Nanas ]]>
<![CDATA[Bambang Dwi Haripriadi]]>;
<![CDATA[Ismet Hari Mulyadi]]>
<![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.2.1.1-8.2018
<![CDATA[Delamination is a failure occured during hole-making processes in machining. This can affect to rejection of the product. This failure is commonly found when drilling low machinability of plastic-based materials such as thermoplastic composites. Therefore, to eliminate that phenomena, the materials are necessary to be reinforced. In this case, addition of the fiber can strengthen the composites. Besides, the way the fibers were arranged when composite manufacturing is also responsible to improve tensile strength of the composites. Improving tensile strength would also improve the shear strength of the material. Shear strength is normally adopted as indicator for machinability of materials. However, relation of shear strength improvement of composites due to fiber arrangement has been rarely discussed. Using orthogonal arrays L27 based on Taguchi, this study investigated the effect fiber arrangement on formation of delamination in drilling pine-apple leaves reinforced composites. The results highlighted that effect fiber arrangement was significant on formation of delamination at exit sides of drilled holes. Reduced rasio delamination had been identified at this side. This inferr that strengthening effect would be a good strategy in reducing delamination at the exit sides.]]>
<![CDATA[Sifat Mekanik dan Struktur Mikro Logam Paduan Mg-1.6Gd Sebagai Biomaterial yang Larut di dalam Tubuh ]]>
<![CDATA[Oknovia Susanti]]>;
<![CDATA[Ilhamdi Ilhamdi]]>;
<![CDATA[Muhammad Ivan Herdian]]>
<![CDATA[ METAL: Jurnal Sistem Mekanik dan Termal Vol 4, No 1 (2020): Jurnal Sistem Mekanik dan Termal (METAL) ]]>
Publisher : <![CDATA[Department of Mechanical Engineering, Universitas Andalas ]]>
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DOI: 10.25077/metal.4.1.47-51.2020
<![CDATA[Recently, the uses of magnesium alloys as implant materials have been potentially applications as biocompatible materials. In this case, the Mg alloys were being concerned because of their mechanical properties that were nearly similar to bones. The addition of Gd in magnesium was in order to control the degradation of magnesium. It is well known that the mechanical properties of Mg-1.6Gd alloys is improved by the small addition. The hardness of the alloys is obtained by the Vickers test with a different position on the samples. The lowest hardness value is 39 HVN, and the highest hardness value is 50 HVN, with the average one is 43.85HVN. Meanwhile, the pure magnesium had 30 HVN. Thus, it could be said that the addition of gadolinium elements could increase the hardness value. Then the tensile test is used a UTM (Universal Testing Machine). The test is used three same untreated samples. From the test are got the ultimate tensile strength of 97-117 MPa, but the ultimate strength of the magnesium is 60 MPa. Microscope optically is used to investigate the microstructure. The grain area is calculated by using the ImageJ program. The result showed that the lowest one is 16 and the highest one is 97.]]>
<![CDATA[Perbandingan pembuatan produk menggunakan simulasi program CNC dan CNC Milling ]]>
<![CDATA[Hendra -]]>;
<![CDATA[Y. Saputra]]>;
<![CDATA[Putri -]]>;
<![CDATA[Hernadewita -]]>;
<![CDATA[Nasril -]]>
<![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.6.1.53-59.2022
<![CDATA[Perkembangan program Computer Numerically Controlled (CNC) Milling menggunakan simulasi sangat membantu proses pembuatan suatu produk dalam mengurangi kesalahan operator dan program yang dibuat sesuai dengan gambar tekniknya. Mesin CNC Milling bekerja untuk memotong dan membuat benda kerja merujuk ke 3 sumbu yaitu sumbu X, Y dan Z. Kesalahan pembuatan dan pemasukan program berupa pemosisian sumbu X, Y, dan Z dapat menyebabkan karakteristik geometrik benda kerja tidak tercapai (bentuk, dimensi, posisi dan kekasaran permukaan.) Kombinasi CAD/CAM sangat mendukung proses pembuatan produk yang memiliki ketelitian dan ketepatan yang sesuai dengan gambar desain sehingga karakteristik geometric benda kerja dapat dipenuhi. Kesalahan pembuatan program dan pemosisian sumbu X, Y dan Z dapat dapat diminimalkan dengan melakukan simulasi pengerjaan benda kerja tersebut seperti pemasukan kode-kode pemotongan benda kerja pada mesin CNC Milling (kode G dan M). Program simulasi yang dapat digunakan adalah Mastercam, swansoft simulation CNC (SSNC) dan lainnya. Penggunaan simulasi ini dapat membantu mempermudah dan mempersingkat waktu pembuatan program CNC Milling untuk produk yang akan dibuat dengan mendesain menggunakan CAD dan dilanjutkan dengan pembuatan program serta menginput program tersebut ke dalam MCU CNC Milling. Dalam paper ini focus menggunakan program simulasi Mastercam dan Swansoft CNC (SSCNC) untuk membuat produk milling dengan dimensi diameter luar 170, 16 mm dan diameter dalam 160,16 mm menggunakan material dural. Dimana hasil pembuatan simulasi program Mastercam dan SSCNC dibandingkan dengan proses pemotongan menggunakan mesin CNC Milling Leadwell V-30. Waktu proses pemesinan secara teoritis adalah 10,61 menit. Dari hasil simulasi dan pemesinan benda kerja menggunakan mesin CNC Milling Leadwell V-30 didapatkan waktunya adalah 9,53 menit untuk simulasi dan 10,56 menit untuk eksperimen. Dengan listing program yang sama antara CNC Leadwell V-30 dan simulasi SSCNC didapatkan selisih waktu pemesinan sebesar 0,09 menit.]]>
<![CDATA[Rancang Bangun Tungku Gasifikasi Tipe Counter-Flow dengan Bahan Bakar Biomassa Municipal Solid Waste (MSW) ]]>
<![CDATA[Dendi Adi Saputra]]>;
<![CDATA[Adjar Pratoto]]>;
<![CDATA[Andoni Prayogi]]>
<![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.1.2.70-76.2017
<![CDATA[This research discusses about designing of counter-flow type gasification stove utilizing biomass municipal solid waste (MSW). The first step of the research process is to formulate the design concept of the gasification stove using the MSW collected in Padang city. The results of the design concept formulation are used to obtain the detail design parameters which is used as the reference for manufacturing the stove. The main designing parameters of the gasification stove are the diameter and the height of the stove. The technical drawing is made according to the designing parameters obtained from the design concept formulation. Base on the technical drawing, the counter-flow type biomass gasification stove was built. The obtained results show that for a large value of updraft air and a small value of downdraft air, the operating time of the stove is long. This condition is obtained in the case of standard air and fuel ratio (AFR<1.5). This results show that the gasification stove efficiency is better in comparison with the conventional one.]]>
<![CDATA[Recondition Cylinder Head Engine Wartsila Diesel 18V32DF ]]>
<![CDATA[Hendri Van Hoten]]>;
<![CDATA[Hairul Gustriranda]]>;
<![CDATA[Nurbaiti Nurbaiti]]>
<![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.3.2.73-78.2019
<![CDATA[Power House Division (PHD) is one of the divisions that is part of PT. ABC. As an electrical energy supplier in XYZ area, Power House Division consist of four Power House, which each Power House has several engine. The first Power House (PH 1) consist of two Diesel engine Generator (DG) and one Gas Turbine in the second Power House. The third and fourth Power House consist of seven Diesel engine Generator.To keep the engine performance stable that is produce maximum power and prevent unknown damage that it make engine trip then the overhaul activity done. overhaul activity is carried out the process of replacement and recondition of spare parts of all parts of the engine. The recondition process is done in the cylinder head.Cylinder Head is an important component of a machine function as a combustion place and as an inlet and airway. There are long stages done In the process of recondition cylinder head from the demolition of cylinder head components to the re-installation of these components. There is a cylinder head that has crack, so it can not be recondition. It should be replaced with a new cylinder head. The machining process is used recondition cylinder head. They are Cutting, Lapping, and Grinding. In the pocket cylinder head, the recondition is found that it has a rust so that the size of the pocket and oversize that it has sticks around the pocket. Grinding process performed on uneven parts of valve.]]>
<![CDATA[Kaji Eksperimental Sifat Mekanik Honeycomb Sandwich Komposit Serat Karbon dengan Uji Bending ]]>
<![CDATA[Marsono Marsono]]>;
<![CDATA[Nuha Desi Anggraeni]]>;
<![CDATA[Fajar Ahmad Faisal]]>
<![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.5.2.114-125.2021
<![CDATA[A higher energy efficiency in a high efficient energy car can be reached by using a honeycomb sandwich structure that is made from fiber-carbon composite which is lighter in weight. With a lighter weight, a higher power-to-weight ratio can be reached. In this research, honeycomb sandwich panels are made from fiber-carbon composite and tested to determine their flexural strength and stiffness. These honeycomb sandwich panels are made with varying thickness of core cell wall, which are made by 1 layer and 2 layers of fiber-carbon sheet. Matrix that is used is epoxy resin that is prepared in two methods, with and without heating. The bending test result shows that the highest flexural strength that can be reached is 5.193 kgf/mm2 which is reached by the specimen that has 2 layers’ fiber carbon with heating epoxy resin. Flexural stiffness is also reached by the same specimen, of 67.49 kgf/mm.]]>
<![CDATA[LAJU OKSIDASI TITANIUM MURNI (CPTI GRADE TIPE 340) BERLAPIS HYDROXYAPATITE (HA) YANG DISINTER DALAM TUNGKU PERLAKUAN PANAS ]]>
<![CDATA[Desmarita Leni]]>;
<![CDATA[Gunawarman Gunawarman]]>;
<![CDATA[Jon Affi]]>;
<![CDATA[Yuli Yetri]]>
<![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.3.1.46-50.2019
<![CDATA[Implants are used for various reasons, such as replacing damaged tissue caused by disease or trauma, as filler and support the healing phase. The general terminology of biocompatibility describes a condition which will not cause harmful interaction between foreign material and the body. Biocompatibility is a system including physical, chemical, biological, medical, and design aspects. This study is focused on the influence of the coating thickness of hidroxyapatite layer on the rate of oxidation. Pure titanium coated by HA with thickness variation needs to be tested for oxidation resistance to determine the coating effectiveness in reducing the rate of oxidation. The rate of oxidation measured by weight loss method after coated titanium by HA and than heating in a heat furnance. HA coatings obtained by a process of electrophoretic deposition (EPD) with variation of time between 5 to 35 minutes at a voltage of 40 V with fineness of 30 µm. The oxidation process was done during the sintering process in a heat furnace for 10 minutes. The result of this study shows that the increase of time EPD increases the thickness of HA layer. Oxidation resistance on CPTi after HA coating does not cause the quality of pure titanium degraded in addition, the oxidation resistance of HA increases from good grade to excellent grade. It shows that the formation of surface oxide slows down during sintering process.]]>
<![CDATA[Meja Getar dengan Sistem Tiga Penggerak Pneumatik untuk Skala Laboratorium ]]>
<![CDATA[Dedi Suryadi]]>;
<![CDATA[Hade Syamitra]]>;
<![CDATA[Ahmad Fauzan]]>;
<![CDATA[Novalio Daratha]]>;
<![CDATA[Indra Agustian]]>
<![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.5.1.44-50.2021
<![CDATA[This study aims to develop a laboratory scale shaking table that can simulate vibrations level by using PLC as controller. Mechanism of the shaking table consists of cylinder pneumatic drive system, where the movement comes from 3 of pneumatic cylinders connected to the solenoid vale later controlled using PLC OMRON CP1L. Therefore, it can produce vertical and horizontal translational movements. Dynamic response can be obtained by varying frequency of 1 Hz, 2 Hz, 3 Hz, 4 Hz, and 5 Hz. Moreover, loads are also varied by 1kg, 2kg and no load. The results of this study indicate that the shaking table is successfully developed that can perform 2 types of translational movements in the vertical and horizontal direction that operate at a frequency of 1 Hz to 5 Hz with maximum load of 2 kg. Amplitude of shaking table increases by decreasing frequency input and loading value. Also, amplitude increases by decreasing value of the valve openings.]]>
