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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 230 Documents
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Perbandingan Analisis Struktur Dan Sifat Mekanik Material Komposit Dari Weave Carbon Fiber & Chopped Carbon Fiber Jamil, Khoirul Fajril; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.25155

Abstract

In this paper, the structure and mechanical properties of Weave Carbon Fiber and Chopped Carbon Fiber are compared. Both of these carbon fibers are used as composite materials for defense equipment and automotive materials applications. Weave Carbon Fiber is a regular woven carbon fiber structure, which provides high tensile strength and elasticity, making it suitable for applications that require structural stability and balance as well as resistance to deformation. On the other hand, Chopped Carbon Fiber is short fibers entangled in the matrix and distributed randomly so that it has a better level of impact resistance but lower tensile strength. 2D manufacturing involves tensile testing, flexural testing, impact testing, and hardness measurements Strain 2D Weave Carbon Fiber has a strength of up to 500 MPa and an elastic modulus of up to 25 GPa, making it suitable for applications that require high mechanical strength Fiber fraction test Chopped Carbon Fiber shows the highest fiber fraction impact resistance of 1668 J/m at 8% fiber fraction but decreases at high fiber fraction. Weave Carbon Fiber has small deflection and good load resistance compared to Chopped Carbon Fiber. This journal can provide insight into the selection of the right material for industries that require high-strength but also lightweight materials. As planned, the selection of such materials is largely determined by the specific application desired.
Pengaruh Variasi Tipe Sambungan Las SMAW pada Baja Karbon Rendah terhadap Uji Tarik dan Uji Impact Azimansyah, Rafidan; Mufarida, Nely Ana; Bahri, Mokh. Hairul
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.24931

Abstract

This study was conducted to examine the effect  various fusing  joint types over the tensile force  and impact toughness of low carbon metal SS400 utilise Shielded Metal Arc Welding (SMAW) method. Three joint types were tested double Bevel groove, double V groove, double U groove, using 100A current and E6013 electrode with a diameter of 2,6 mm. The test were conducted at the state polytechnic of Malang. The tensile test results showed that the double Bevel joint had the highest tensil strength, with a maximum value of 11.626 Mpa. Meanwhile, the umpact test revealed the highest energy absorption at 127.468 Joules or 2.12 Joules/mm2 for the same joint type. The study concludes that the double Bevel groove joint provides the best mechanical performance for SS400 steel, making it the most recommended option for applications requiring high resistance to tensil and impact loads.
Pengaruh Variasi Durasi Waktu Injeksi Oksigen Terhadap Performansi Insinerator Dual Chamber Limbah Medis Darma, I Wayan Arya; Winaya, I Nyoman Suprapta; Pratama, I Putu Angga Yuda; Sanatana, I Ketut Sakya
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.24923

Abstract

Incineration is an effective waste processing method, especially for medical waste which is B3 waste. The high temperature combustion process in incineration is expected to be able to reduce medical waste optimally. However, emissions produced during the incineration process can pollute the surrounding environment and harm health. So it is necessary to develop incineration methods to reduce exhaust emissions but still be able to reduce medical waste optimally. In this research, additional oxygen injection was carried out in chamber 2 of the dual chamber medical waste incinerator by varying the duration of the oxygen injection time with the aim of obtaining optimal performance and reducing the resulting exhaust emissions. The research was carried out using medical waste weighing 1 kg with variations in the duration of oxygen injection, 2, 3 and 4 minutes. The research results show that increasing the duration of oxygen injection time can increase combustion efficiency, increase the temperature in chamber 2 and reduce the resulting exhaust gas emissions.
Desain Perancangan Mesin Pemotong Kentang Multifungsi Rohman, Arif; Saputra, Trisma Jaya; Dewi, Rany Puspita
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.23876

Abstract

We often encounter potatoes in eating places and restaurants that have been made into ready-to-eat food because they are easy to process into various kinds of food, one of which is french fries. The aim of this research is to produce a design for a multifunctional potato cutting machine that is efficient and portable. The concept refers to the design process of designing a machine by determining the dimensions, size and constituent components displayed on the working drawings. The results of this multifunctional potato cutting machine design resulted in the design of machine components such as a potato funnel hopper with dimensions of 300 mm x 80 mm x 222 mm, a potato pusher with dimensions of 80 mm x 114 mm, and the main frame of the machine with dimensions of 421 mm x 300 mm x 380 mm. Three variations of cutting knives consisting of flat, long/stick-shaped and soft-shaped cutting knives. The knife driver used is an electric motor with a power of 125 watts, blade rotation speed of 700 rpm, and another drive transmission. Overall, the results of this design produce a design drawing for a potato cutting machine with dimensions of 421 mm x 300 mm x 544 mm, so that this machine is more efficient and portable.
Komparasi Ketahanan Erosi dan Korosi pada Coating Hidrofobik Sol-Gel dan Silika-PDMS untuk Logam Alloy Putra, I Gede Gilang Taruna; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.25159

Abstract

Corrosion in metal alloys such as aluminum and carbon steel poses a major challenge in industries like aerospace, marine, and automotive, where such materials are frequently exposed to harsh environments. Hydrophobic coatings have emerged as promising solutions to enhance corrosion resistance. Among them, sol-gel and silica-PDMS coatings stand out due to their specific advantages. Sol-gel coatings are known for their excellent corrosion and erosion resistance, strong adhesion, and high mechanical durability, making them suitable for aggressive environments. On the other hand, silica-PDMS coatings provide superior hydrophobicity, ease of application, and flexibility, though with moderate corrosion resistance. This paper compares the performance of both coatings in terms of their corrosion and erosion resistance, application methods, and environmental suitability. The findings indicate that sol-gel coatings outperform silica-PDMS coatings in corrosion and erosion resistance, while silica-PDMS is more favorable for applications requiring high water repellency but in less corrosive conditions. Future research is recommended to optimize the formulation of both coatings and investigate hybrid solutions that combine the strengths of each material.
Pengaruh Sodium Benzoat Terhadap Ketahanan Warna Pewarna Alami Dari Kulit Alpukat Terhadap Cahaya Dan Pencucian Nisrina Zahrah, Firyal; Rizkia, Vika; Djonaedi, Emmidia
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.24917

Abstract

Synthetic dyes in the textile industry are toxic and pollute the environment. As an alternative, natural dyes from avocado skin (Persea americana) have the potential to be used because they contain phenolic compounds such as flavonoids and tannins. However, its color stability is still a challenge. This study aims to evaluate the color stability of avocado skin pigments on cotton fabrics, with and without the addition of sodium benzoate as a stabilizer. The pigments were extracted through maceration using 96% ethanol, then applied to cotton fabrics and tested against light exposure and washing. Analysis was carried out on the parameters ΔE, Optical Density, and CMYK. The results showed that samples with sodium benzoate were more stable in color (ΔE = 1.34) than without stabilizer (ΔE = 3.31). Sodium benzoate is effective in maintaining the intensity and spectral stability of pigments, supporting their use in environmentally friendly natural textile dyes.
Analisis Komposit Karbon Aktif Dari Tongkol Jagung Dengan Aktivator NaCL Terhadap Hasil Morfologi Dan Sifat Fisik Lathifah, Hana; Rosidah, Afira Ainur; Yunus, Muhammad
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.23361

Abstract

Corn cobs (Zea mays L.) can produce charcoal as a source of carbon. Carbon is a potential candidate for reducing exhaust gas emissions containing hydrocarbons, carbon dioxide, and nitrogen dioxide. This research aims to convert corn cobs into activated carbon by adding NaCl activator in concentrations of 0%, 8%, and 16% and then compositing it with sago starch. FTIR testing occurred on the carbon from corn cobs before and after activation to analyze the functional groups in the activated carbon. The carbon was then composited with a ratio of 75:25 and subjected to SEM-EDX testing, moisture content analysis, and ash content analysis. FTIR testing revealed the carbonyl group (C-O) that could reduce emission levels. SEM-EDX testing showed that higher concentrations of NaCl activator (16%) resulted in more and smaller pores. Moisture content analysis indicated that higher concentrations of activators led to increased moisture content. Conversely, ash content analysis showed that lower concentrations of activator resulted in higher ash content. The tests concluded that the optimal composite of activated carbon from corn cobs and sago starch existed at an 8% NaCl activator concentration and a 75:25 composition, making it a promising candidate for reducing exhaust gas emissions.
Optimalisasi Komposisi Bio-Ink Berbasis Ekstrak Bunga Telang (Clitoria ternatea) dan Gum Arabic Terhadap Capaian Warna Cyan pada Aplikasi Inkjet Printing Salsabila, Salsabila; Kusumantoro, Heribertus Rudi; Pratama, Yoga Putra
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.24763

Abstract

The digital printing industry currently faces environmental challenges due to the use of synthetic inks containing hazardous chemical compounds. This study aims to optimize the composition of bio-ink based on butterfly pea flower extract (Clitoria ternatea) and gum arabic as an environmentally friendly alternative for cyan ink in inkjet printing applications. The research method used varying concentrations of butterfly pea flower extract (1%, 3%, 5%, and 7%) and gum arabic (1%, 2%, 3%, and 4%) with testing parameters of pH, viscosity, and color analysis using the CIE Lab system and Delta E (ΔE) evaluation. The results showed that all formulations produced pH in the range of 5.3-6.6, suitable for inkjet printing applications. Viscosity values ranged from 7.57-9.35 mPa.s, meeting technical standards for inkjet ink (2-10 mPa.s). Color analysis showed that the formulation of 7% butterfly pea flower with 2% gum arabic produced the lowest ΔE value (14.55), indicating the highest similarity to commercial cyan ink. Statistical analysis confirmed that butterfly pea flower concentration significantly influenced pH and color accuracy (p-value 0.05). This research successfully developed sustainable bio-ink with physicochemical characteristics approaching commercial ink standards, contributing to the development of environmentally friendly printing industry. 
Development Composite Metal-Ceramic Hybrids and Polymer Foam Composites Reinforced TKKS Fiber with Variations Al2O3 Concentration for Enhancement Mobility and Protection Armored Vehicle Wulandari, Viviq Ardita; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.22652

Abstract

Armored vehicles require materials that can provide high protection from ballistic and explosive threats, and have a light weight to increase mobility. This study aims to develop metal-ceramic hybrid composites and polymer foam composites reinforced with OPEFB (Oil Palm Empty Fruit Bunches) fibers with varying concentrations of Al2O3 ( Aluminum Oxide). This combination was tested to assess mechanical strength, ballistic resistance, and energy absorption capabilities from impacts and shock waves. The results showed that the composite using a 10% Al2O3 concentration variation provided the best balance between strength and light weight. The use of these two types of composites is expected to increase the mobility and protection of armored vehicles.
Pemanfaatan Sodium Alginat Dan Karbon Aktif Ampas Tebu Untuk Menurunkan Kadar Besi (Fe) Dan Mangan (Mn) Pada Air Sumur Bor Nasution, Annisa Wulan Dhari; Daulay, Abdul Halim; Jumiati, Ety
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.23221

Abstract

Drilled well water contains heavy metals with high levels of iron (Fe) and manganese (Mn). This research aims to evaluate the successful use of sodium alginate and sugarcane bagasse activated carbon to reduce iron (Fe) and manganese (Mn) levels. The remediation method was successfully used to reduce iron (Fe) and manganese (Mn) levels in drilled well water. The quality of the activated carbon used has been tested and meets the SNI 06-3730-1995 quality standards. The remediation process was carried out with five composition variations used in this research, namely Sample A (SA 5% : KAAT 95%), Sample B (SA 15% : KAAT 85%), Sample C (SA 25% : KAAT 75%), Sample D (SA 35% : KAAT 65%), and Sample E (SA 45% : KAAT 55%). The results of this research show that the combination of activated carbon with bagasse is able to reduce iron (Fe) and manganese (Mn) levels significantly, with the best results in reducing iron and manganese levels found in sample C, namely with iron (Fe) levels of 89.72% and manganese (Mn) content of 99.82%. Based on the analysis results, this method was proven to be effective in reducing iron and manganese levels.

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