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Jurnal Rekayasa Material, Manufaktur & Energi
Published by Universitas Muhammadiyah Sumatera Utara
ISSN : 26227398     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Jurnal Rekayasa Material, Manufaktur & Energi, yang diterbitkan oleh Fakultas Teknik, Program Studi Teknik Mesin, Universitas Muhammadiyah Sumatera Utara (UMSU), Medan, Sumatera Utara, Indonesia, Jurnal Rekayasa Material, Manufaktur & Energi menerima artikel ilmiah hasil-hasil penelitian, dan eksperimen, yang mencakup pada bidang Rekayasa Material, Manufaktur dan Energi, Mesin, dan ilmu yang relevan pada sektor terkait.
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Articles 130 Documents
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Peran Kaolin Clay dan Karbon Aktif dalam Produksi Gas Hidrogen dengan Metode Fotokatalisis Yepy Komaril; Sudarman S
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10265

Abstract

The energy crisis is a challenge in the industrial sector. Hydrogen is environmentally friendly alternative energy. This study aims to determine the role of kaolin clay and activated carbon in hydrogen production by the photocatalysis method. Hydrogen production was carried out in a closed tube reactor with a total volume of 500 mL filled with 100 mL of pure water and the remainder for air. 300 W halogen lamp was used as the light energy source. The photocatalysis test temperature was maintained at 70oC. The hydrogen gas was measured using the MQ-8 sensor connected to the Arduino Uno atmega 328p microcontroller and a computer. From the results of photocatalysis testing, kaolin clay photocatalyst has a significant role in the production of hydrogen gas. The use of 10 mg of kaolin clay was able to produce hydrogen gas of 81 mol h-1. This value was the highest when compared to the use of an activated carbon photocatalyst or the combination of kaolin clay with activated carbon. Kaolin clay which has a content of 7.58% silica and a high electron density has an important function for the dissociation of hydrogen and covalent bonds in photocatalysis solutions.
Analisis Kekuatan Tekan Selubung Komposit Laminat E-glass pada Beton Kolom Silinder dengan Metode Vacuum Bagging Doni Alfiah Siregar; Achmad Jusuf Zulfikar; M. Yusuf Rahmansyah Siahaan; Rakhmad Arief Siregar
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10259

Abstract

This study aims to obtain the average compressive strength of cylindrical column concrete specimens reinforced with an e-glass fiber laminate composite wrap based on variations in the number of wraps. In addition, in this study, the compressive strength and damage patterns will be analyzed to obtain the performance of the sheath in the concrete structure. The test specimens were molded according to the ASTM C39 standard with a diameter of 50 mm and a length of 150 mm. The process of applying laminated composite wrap to concrete specimens is carried out using the vacuum bagging method. The compressive strength test on the specimen is carried out by providing an axial load on the specimen until it failures. The results obtained are that the compressive strength of the specimen has increased significantly due to the provision of e-glass fiber wrap. A significant increase in the compressive strength of concrete specimens occurred in 3 layers of e-glass fiber wrap which reached more than 60%. Furthermore, the ability of the e-glass fiber wrap in protecting the cylindrical concrete structure due to the applied load also experienced an increase in performance in the 2 and 3 layers of the e-glass fiber wrap.
Eksperimental Kekerasan Dan Struktur Mikro Pada Produk Foot Step Berbahan Limbah Alumunium Hasil Pengecoran Cetakan Pasir Silika Berpengikat Bentonit Dendi S; Ahmad Marabdi Siregar; Chandra Amirsyah Putra Siregar; Arya Rudi Nasution; Mahyunirsyah Mahjudin
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10266

Abstract

This study aims to determine the results of the hardness values of castings using silica sand molds on market products and the microstructure contained in the results of various mold castings. Aluminum is often used as a material for making automotive components, machinery, art objects, and household appliances. Aluminum is a lightweight metal that is corrosion resistant. The foundry industry has now developed a lot from metal casting to non-metal casting. One of the metal casting technologies known today is metal casting technology with sand casting, the casting carried out in this study uses sand molds. The materials used in this study include silica sand, bentonite, water, aluminum waste, and the tools used include patterns, melting furnaces, scales, sand paper. In this research, testing, hardness test and microstructure test were carried out. The results of the hardness test on the standard specimen have an average value of 76.33 BHN, the first mold variation specimen has an average value of 63.69 BHN, and the second mold variation specimen has an average value of 63.84 BHN. In the microstructure test, the first variation of the castings had good aluminum dispersion, a high level of porosity, and for the second variation specimen the castings had good aluminum dispersion and low porosity. After seeing the results of the hardness and microstructure tests, it can be explained that the market product has a better value for the test results, this is because the results of the castings use permanent molds, and it can also be seen that the results of the microstructure affect a hardness value of the two results of the bentonite-binding silica sand mold castings.
Analisis Termoelektrik Generator (TEG ) Sebagai Pembangkit Listrik Bersekala Kecil Terhadap Perbedaan Temperatur Muharnif M; Khairul Umuani; Firman AlwiArif Nasution
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10260

Abstract

Electrical energy has now become a major need for the community, so it is necessary to develop alternative sources of electrical energy that are environmentally, not only on a large scale but also on a small scale. Thermoelectric Generator is a power plant that works based on the Seebeck effect, where the temperature difference between the hot and cold surfaces of these 2 electronic components is converted into electrical energy on a small scale. This study aims to analyze the effect of temperature differences that occur on the electrical energy produced in a thermoelectric. This research was studied by comparing the difference in heat generated from 1, 2 and 3 candles with Peltier elements connected in series to the power and efficiency produced with a time duration of 120 seconds. Based on thos research, it shown that this thermoelectric generator is capable to producing 0.01200 Watt with a temperature difference of 10 oC for 1 candle, and producing 0.02920 Watt with a 12 oC temperature for 2 candles and generating 0.04107 Watt with a temperature difference of 14 oC for 3 candles. While the resulting efficiency is 0.033%, 0.057% and 0.092% each using 1, 2 and 3 candles for 120 seconds.
Pengaruh Putaran Spindle Dan Bahan Spesimen Terhadap Gaya Potong Pada Proses Pemesinan Turning Hadi Sucipto; Arya Rudi Nasution; Khairul Umurani; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10267

Abstract

The turning Machining Process is one of the most commonly used machining processes in the industrial world, both in large-scale industries and small industries (home industries). The turning machining process is a process of changing the shape of the material by removing some of the material in the form of swells. During the machining process, there is an interaction between the tool and the workpiece specimen being cut which results in a change in the cutting force. The value of the cutting force is important information in research, this study aims to see the cutting force during the turning machining process using 2 different types. The research data collection method uses sensor tools, there are three sensors, namely the load cell sensor for cutting force, the photoelectric counter module for rotation (rpm), and the thermocouple for feeding temperature. The research variable used is the rotational speed of rpm starting from 90, 110, 150, and 190 rpm, the depth of cut is 0.3 mm. The cutting force generated on the DCGT insert chisel is 5.94N at 90 rpm, 4.13N at 110 rpm, 2.38N at 150 rpm, and at 190 rpm the DCGT chisel gets a force of 2.03N. Furthermore, the cutting force that occurs on the DCMT insert chisel is 2.94N at 90 rpm, 2.67N at 110 rpm, 2.61N at 150 rpm, and at 190 rpm the DCMT insert chisel gets a force of 2.51N. It can be concluded that the decrease in cutting force is influenced by the amount of rpm used, and the magnitude of the cutting force is due to vibrations that occur in the specimen caused by low rpm.
Perancangan Sistem Suspensi Dan Analisis Pegas Sepeda Motor Listrik Phb Menggunakan Finite Elemen Metode (FEM) Sigit Setijo Budi; Firman Lukman Sanjaya; Fitri Ayu
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10261

Abstract

Currently, motorcycles in general and especially electric motorcycles, are equipped with various technologies, one of which is a suspension system. Electric motorcycle suspension has advantages, one of which is the damping of the rear suspension and has a suspension that is comfortable for daily mobility and tends to be soft when passing through damaged roads. The purpose of this study was to determine the load of the suspension using the finite element method. In this study, the springs received loads of 60kg, 80kg, 100kg and 120kg. From the results of this study, ST 37 suspension has better performance compared to AISI 1020.
Perencanaan Mesin Perajang Umbi Porang Dengan Pisau Horizontal Khoidul Umam; Wilarso .
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10268

Abstract

The compact heat exchanger is one type of heat exchanger which has an area of heat transfer per unit volume the largest (? 400 m2 / m3 for liquids and ? 700 m2 / m3 for gases) which is composed of fin and tube. But often found a decrease in heat transfer performance on a heat exchanger. To increase the heat transfer performance, changes are made on the surface of. Along with the development of science and technology in the field of processing porang tubers. Technology to get production results that are efficient, effective, and innovative in terms of guaranteed work safety increases productivity. The purpose of this study is to facilitate the performance of farmers or agricultural business actors, in the development of porang tuber processing. The method in this research is to design porang tuber cutting tools to become porang chips, which are currently a promising export commodity. To make porang chips, a tool is needed to chop porang tubers with a predetermined thickness. Currently, there are many tubers chopping machines to help make the production process more efficient. However, in the use of these tools, there are still some obstacles, namely the chopper machine is not suitable for all types of tubers, especially porang tubers. This porang tuber has a round shape with varying diameters. And to make Porang Chips, it is necessary to chop with a thickness of 5-7 mm. So to overcome this, a special machine is needed to chop porang tubers with a standard thickness of 5-7 mm. To get effective, efficient results in guaranteed work safety, a porang tuber chopper machine was designed using a horizontal knife. The basic working principle of this machine is to convert the mechanical energy of the driving machine into rotary energy which is used to rotate the blade disc that works horizontally with the aim that the blade can slice continuously and with the same thickness.
Pengaruh Arus Las Smaw Kampuh V Metode 1gplat Datar Alur Segitigaterhadap Kekuatan Las Pada Material AISI 1016 Adi Isra; Nazarudin N; Weriono W
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10257

Abstract

The nature of electrode with the base metal is as important as the welding speed and design of joint. One of the metal joining systems is the SMAW (shielded Metal Arc Welding) welding system with wrapped electrodes. Generally, for welding high strength steels a higher heat input is used in the SMAW process compared to other processes. The influence of heat input and welding speed affects the characteristics of the material, microstructural properties and mechanical properties of the weld. The type of electrode used is current according to the material to be welded, in this case the author uses AWS E-7016 welding wire with D32 mm and AISI 1016 material with a thickness of 12 mm using V connection. The welding process occurs because of the resistance of an electric current flowing between the electrode and the welding material which causes heat to reach 30000C, thus making the electrode and the material to be welded melt. Welding currents of 100 A and 120 A have tensile strength, ultimate strength and elongation above 20% which is the result of the same good strength as the parent metal.The purpose of this study was to obtain the tensile strength and bending strength of the welded joint with V seam welding and to compare the results of the tensile strength and bending strength with the effect of high current variations on the electrode during welding.The results of the buckling test for a current of 80 a showed a fracture in the WM/HAZ, fracture occurred in the welding area, while for a current of 100 A, fine cracks were obtained in the WM/HAZ in the weld area and a current of 120 A obtained a Void: 0.8 with better welding results.
Pengaruh Suhu Cetakan Terhadap Produk Plastik Berbahan Polyprophylen (PP) Pada Injection Molding Fadhlurrohman F; Khairul Umurani; Affandi A; Hendri Nurdin; Arya Rudi Nasution
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10264

Abstract

The manufacture of plastic products is carried out using the Plastic Injection Molding (PIM) method. The Injection Molding method is the process of forming a workpiece from granular compound material which is placed into a hopper and enters the injection cylinder which is then pushed through the nozzle. The materials used in this research are as follows: Polypropylene (PP) Plastic Seeds and the selected temperatures are 160C, 170C, 180C, 190C, 200C. After conducting several experiments on temperature variations of moving and stationary molds, it is known that the mold must have the right temperature to produce the product. This can be seen from the results of the research that the right mold temperature is 71C at rest and the heating temperature for moving molds is 63C the result is that the product has dried.
Pengaruh Annealing Baja St 37 Terhadap Kekerasan Dan Kekuatan Tarik Affandi .; Arya Rudi Nasution; Iqbal Tanjung; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11796

Abstract

Steel ST 37 which is equivalent to AISI (The American Iron Steel Institute) is one of the steels produced for the manufacture of various machine components. To improve the mechanical properties and material structure of ST 37 Steel, it is necessary to carry out the heat treatment (annealing) process. The objective of this study was to determine the annealing treatment of ST 37 steel on hardness and tensile strength to analyze the tensile test on ST 37 steel before and after annealing treatment and to analyze the hardness test of ST 37 steel before and after annealing treatment. The annealing process is carried out by preparing the test material and inserting the test material into the furnace and tightly closing the door of the heat treatment furnace. Set the temperature to be used in the test, which is 500C, and held for 60 minutes. Then turn off the furnace and leave the test specimens in the furnace for 72 hours to cool through the air cooling medium, after which tensile and hardness tests are carried out. The test results of the tensile test specimens with the ASTM E8/E8M standard and the hardness test specimens with the ASTM E18 standard are, the average value of the tensile test results before the annealing process is 50.65 kgf/mm and the average value of the tensile test results after the annealing process is 31.45 kgf/mm. While the average value of the hardness test before the annealing process was 75.22 HRA and the average value of the hardness test after the annealing process was 67.63 HRA. From these results, ST 37 steel before the annealing process has higher hardness and tensile strength. However, in subsequent tests, harder specimens can be used compared to ST 37 Steel specimens, and in the use of heat treatment furnaces, it is preferable to be in a state of heat safety.

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