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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.
Arjuna Subject : -
Articles 250 Documents
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Review Komprehensif : Studi Perbandingan Antara Material Logam dan Komposit untuk Pembuatan Helm Anti Balistik Miwazuki, Shella Athaya; Anisa, Puspita; Rustama, Ravania Zackeisha; Christina, Athalia; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.17285

Abstract

The need to develop protective systems to protect against attacks from various sources is increasingly becoming a personal, social and national security issue. To develop innovative armor systems, it is necessary to monitor the developments made on the types, technology and performance of threats (weapons, projectiles, explosives, etc.) In particular, the use of helmets of a high level of protection on the battlefield is essential. Therefore, the development of evaluation methods that can predict injury and trauma is very important. However, the risk of injury or trauma that may result from induced acceleration is an additional consideration. To develop new materials and layouts for helmets, it is necessary to study the impacts caused by ballistic impacts on the human head in various scenarios. Composite materials in military applications have proven to be superior to metal materials, in increasing the mobility of Force personnel. The use of composite materials in military helmets is very important in relation to the speed of incoming bullets, one of which is made from thermoplastic and thermoset polymers. Particle composite material composed of Bisphenol A epoxy resin matrix and reinforcement in the form of Javanese jute fiber which is applied to bulletproof helmets. When using this composite, you can determine the number of sheets of Javanese jute fiber that is effective against the force of the bullet fired, this is to support the safety of its use.
Analysis the Effect of Different Surface Preparation Methods on Corrosion Resistance of ASTM-A36 Steel Santoso, Irwan Wijaya; Aqila, Daffa; Riastuti, Rini; Ramadhani, Rizal Tresna
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.18884

Abstract

 In the industrial world, to extend the service life of materials, protection methods are carried out to slow down the material's corrosion rate. The protection method that is often used is the coating method. The coating method is a protection method by coating the substrate material using a coating material to prevent contact between the substrate material and the environment. In this research, the substrate material used is ASTM A36 steel and the coating material used is Surface Tolerant Epoxy paint. The independent variable used in this study lies in the surface preparation method which consists of: solvent cleaning, hand tool cleaning, power tool cleaning, power tool to bare metal cleaning, and abrasive blast cleaning. Different preparation methods result in different roughness and cleanliness of the surface. This can affect changes in the mechanical properties of the coating material, such as corrosion resistance and adhesion strength. Based on the corrosion resistance test, it is found that the  abrasive blast cleaning and power tool to bare metal cleaning methods produce the highest corrosion resistance properties because both have a rating number of 8 in the salt spray test results. Based on the adhesion strength test, it is found that the abrasive blast cleaning method also produces the highest adhesion strength. This conclusion refers to the results of the tape x-cut test where the sample produces a rating number 5A where the sample does not experience peeling after testing. In addition, the abrasive blast cleaning method produced the highest adhesion strength in the pull-off test, which was 7.16 Mpa. Thus, the abrasive blast cleaning method is the most effective surface preparation method for ASTM A36 steel before being coated with the coating material. In addition, it can also be concluded that the higher the surface roughness of the sample, the better the corrosion resistance and adhesion strength.
Respon Mekanik Komposit Hibrid Diperkuat Serat Karbon dan Serat Kaca Akibat Beban Impak Untuk Aplikasi Helm Keselamatan Kerja Piliyang, Muhammad Yani; Amiruddin, Arfis; ., Indrayani; Ulana, Muhammad Indra
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.16910

Abstract

Work safety helmets serve to protect the head from falling objects hitting the head directly and absorbing impact energy. To improve the performance of project helmets, innovations are made by using composite materials that combine the advantages of 2 types of fibers. This study aims to investigate the impact strength of hybrid composite materials using carbon fibers and glass fibers in an epoxy resin matrix and to make a prototype of a safety helmet. The manufacture of impact test specimens and prototype work safety helmets using the hand lay up method, using standar ASTM E23 05. The use of one type of fiber with a matrix:glass fiber or carbon fiber ratio of 50:50, and the use of a combination of two fibers with a matrix:glass fiber and carbon fiber ratio of 70:30. After that, charpy impact testing was carried out on the test specimens. The results obtained from impact testing show that the use of a combination of two carbon and glass fibers is able to withstand and absorb impact energy well.
Literatur Review: Performa Baterai Lithium-ion, Lithium-sulfur, dan Lithium-air sebagai Penggerak UAV Spionase Pertahanan dan Keamanan ., Mohtar; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.19536

Abstract

Currently, the development of science and technology is developing very quickly. One technology that is currently developing rapidly is unmanned aerial vehicles (UAV). This technology is believed to be a new breakthrough in the modern era because it minimizes human involvement in its operation. This increases effectiveness and reduces risk management in the operational field. Especially in the vast territory of the Unitary State of the Republic of Indonesia with diverse natural landscapes, UAV are considered very helpful as a means of defense and security equipment (alpahankam) in espionage. With these geographical conditions, to carry out its mission, a UAV requires a battery as the driving force. However, in general, the most widely used battery is the lithium-ion (Li-ion) type. It is known that there are several problems with Li-ion batteries, including not being able to withstand heat, being prone to exploding, and if the battery has a large capacity, the size of the battery must be large. Considering this situation, a study is needed to examine several alternative types of batteries, namely: lithium-air (Li-air) and lithium-sulfur (Li-S) batteries. This article aims to compare the performance of lithium-air batteries, and lithium-sulfur batteries which can later replace the use of lithium-ion batteries which are currently widely used in UAVs. The method used in writing this article is Systematic Literature Review (SLR) by searching, collecting and evaluating several sources related to the research object. From a comparison of the three batteries, Li-S batteries offer a large specific energy compared to Li-air and Li-ion batteries. Li-S batteries are currently receiving more attention so they are expected to move towards mass use more quickly. The results of this literature are that Li-S batteries have an energy density of 2,500Wh/kg and have exceeded the energy density of Li-ion batteries of 890Wh/kg and Li-air batteries of 250-1,200Wh/kg. Energy density determines how much energy can be accommodated in a cell of the same size. Thus, it is hoped that Li-S batteries will be a solution to problems with UAV batteries.
Efektivitas Komposit dalam Memperkuat Rompi Anti Peluru Hertanto, Theofillus Lisa Okta; Aritonang, Sovian; Murniati, Riri
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.17325

Abstract

This research examines the effectiveness of bulletproof vests made with composite materials, focusing on carbon fiber. The study finds that the thickness of the carbon fiber and the HGM plastic coating in the vest are crucial factors in enhancing protection against bullet penetration. In some instances, thicker composite materials offer better defense. Furthermore, the use of composites allows for lightweight vests, reducing the physical strain on the wearer. These findings have significant implications for the development of personal protective equipment in various sectors, such as the military, law enforcement, and industries like construction. Enhancing the efficacy of bulletproof vests through the integration of composite materials is a vital stride in enhancing the safety of individuals encountering potential bullet threats.
Analisis Performa PLTSOff -Grid 1 kWp Di Selasar Gedung Laboratorium Politeknik Negeri Jakarta Hidayati, Noor; Sitorus, Andre Halomoan; Widiyatmoko, Widiyatmoko; ekayuliana, Arifia
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.17275

Abstract

The performance analysis of a 1 kWp off-grid Solar Power Plant (SPP) located on the terrace of the Energy Laboratory Building at Jakarta Polytechnic was conducted to determine the SPP's performance. The analysis involved comparing the design data with the actual installed system conditions. The methodology employed manual calculation of the SPP's power generation and simulation of its performance using PVSyst software. The analysis results indicated that the current performance ratio of the SPP is only 11%, primarily due to the low direct utilization of solar energy. A recommendation provided is to increase the load on the SPP system. Simulations conducted on the recommended load increase demonstrated a significant improvement in the performance ratio, with a value of 58%.
Variasi Media Pendingin Proses Pengecoran Terhadap Kekuatan Material Dan Struktur Mikro Pada Pengecoran Aluminium ADC12 Ningsih, Pita Dwi Rahayu; Umar, Mega Lazuardi; W.W, Prabuditya Bhisma; Hanafi, Agung Fauzi; P.U, Rochmad Eko
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.20246

Abstract

Metal casting can influence the mechanical properties and materials’s microstructure such as aluminum. The mechanical properties, strength, and microstructural form are affected by the solidification process during casting. These changes occur due to the cooling media used in the solidification process. The mechanical properties of metals, especially material strength, are crucial in today's manufacturing industry. This research investigates various cooling media in the casting process, including air, radiator coolant, and oil. Tensile tests and microstructural analysis were conducted to determine the mechanical properties and grain structure of the castings. The tensile testing showed that the highest tensile strength was achieved with radiator coolant at 146.305 MPa, followed by oil at 141.297 MPa, and the lowest with air at 131.431 MPa. Microstructural analysis revealed that the finest grains were obtained with oil cooling, while the largest grains were observed with air cooling.
Teknologi Tenda Militer Portabel Berbasis Tenaga Surya Dalam Mobilisasi Taktis Tempur Aritonang, Sovian; Fajri, Zaidan Al; Azida, Putry Wanda; Sandri, Azzahra; Dintyra, Muhammad Daffa
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.17288

Abstract

Indonesia's extensive geography, spanning from Sabang to Merauke, provides an uninterrupted solar energy supply, thanks to its prolonged daylight hours. This presents an excellent opportunity for the country to embrace renewable and sustainable energy, with solar power being a convenient option given Indonesia's tropical climate. The conversion of solar heat into electrical energy is an attractive proposition, allowing for the use of portable solar panels to power military vehicles while minimizing reliance on fossil fuels. Efficient energy storage solutions are needed to convert solar thermal energy into electrical energy, and sodium batteries are a more potent and eco-friendly option. Portable solar panels also offer an energy source for various military operations, such as powering tents and charging communication equipment. By incorporating solar energy into their operations, the Indonesian army can increase their capabilities while reducing their reliance on conventional energy sources. In conclusion, harnessing the abundant sunlight and tropical climate in Indonesia through portable solar panels and sodium-based batteries is a dependable and sustainable solution to meet the energy needs of military operations. This approach enables Indonesian soldiers to carry out their missions efficiently while minimizing environmental impacts.
Assessing The Mechanical Properties And Performance Of Biocomposite And Natural Fiber Based Bulletproof Vests Nabilla, Dhawya Najma; Aritonang, Sovian; Muniarti, Riri
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.17339

Abstract

Within the munitions industry, there has been a notable emphasis on the development of cost-effective, easily wearable, and biocompatible flak armor. The rising popularity of fiber-reinforced polymer biocomposite technology, particularly employing natural fibers, stems from its eco-friendliness and cost-effectiveness, which holds particular significance in today's defense sector. As firearm technology advances rapidly, it necessitates a concurrent focus on enhancing personal protective equipment, with bulletproof vests being a commonly utilized safeguard. These vests play a critical role in mitigating the impact of ballistic threats on individuals. This study is dedicated to the investigation of natural fiber biocomposite materials for their applicability in bulletproof vests, addressing their mechanical properties and suitability for such a vital protective role.
Karakteristik Arang Kulit Durian Dan Daun Jenggelan Untuk Pembuatan Tinta Organik Ramadhani, Devi Rezky; ., Masthura; Husnah, Miftahul
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.18962

Abstract

Printing inks contain dyes, adhesives, lubricants, plastics, surfactants and other substances. Chemical-based inks have carcinogenic, toxic, and corrosive properties that cause breathing difficulties and dizziness in humans when the substance is vaporized and inhaled, disorders of the brain, liver, and nervous system if inhaled for a long time. So an organic ink innovation is needed. This study aims (i) to determine whether durian peel charcoal and janggelan leaves can be used as a basic material for making organic ink. (ii) To determine the characteristics of organic ink made from durian skin and janggelan leaves. (iii) To determine the optimum composition of durian skin charcoal and janggelan leaves. The tests carried out are density, viscosity, surface tension and Fourier Transform Infrared (FTIR). The results obtained show that the organic ink that can be used is with a sample composition of 5 grams of durian skin charcoal, 1.5 grams of janggelan leaf extract, 96% alcohol 15 ml and distilled water 20 ml. With ink density value of 0.92 gr/cm3, viscosity value of 3.88 Cp, surface tension value of 45.802 dyne/cm. The functional groups of organic ink that have been studied are OH, CO, C=O, C ≅ C.

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