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All Journal Jurnal Teknik ITS SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin ROTOR: JURNAL ILMIAH TEKNIK MESIN R.E.M (Rekyasa Energi Manufaktur) Jurnal Journal of Mechanical Engineering Science and Technology STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Elemen JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Dedikasi: Jurnal Pengabdian kepada Masyarakat Mechanical Engineering for Society and Industry PEKAT : Jurnal Pengabdian Kepada Masyarakat Medani : Jurnal Pengabdian Masyarakat
Rahma Rei Sakura
Teknik Mesin Fakultas Teknik Universitas Jember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Transportation Other

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Effect of Variation of SiC Mass Fraction on Mechanical Properties of Al-SiC Composite Using Stir Casting Method Sumarji Sumarji; Naufal Fardio Albajili; Mahros Darsin; Rahma Rei Sakura; Andi Sanata
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 6, No 1 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v6i12022p023

Abstract

Al-SiC is a composite composed of AA6061 as a matrix and SiC as a reinforcement particle. The variation of mass added will affect the mechanical properties of the composite because Al-SiC is hardenable, which means that its mechanical properties can be improved by adding the reinforcement component. However, an excessive portion of SiC leads to a decrease in mechanical properties. The purpose of this study was to find the optimal composition of the addition of SiC into the aluminium matrix to gain maximum tensile strength and hardness. The mass fraction variation that would be used in this composite was the addition of 6%, 8%, and 10% SiC with the addition of 1% Mg as a wetting agent. The mixing process used the stir casting method. The process of adding SiC and Mg was carried out by melting the aluminium while stirring it for a certain time before it went to the furnace. The ASTM E8/E8M standard was used for observing the tensile strength of the specimens. Machining was carried out before testing. The specimens were also tested for hardness using the Rockwell hardness method. The result shows that the addition of SiC at the amount of 6%, 8%, and 10% SiC increased the ultimate tensile strength by154.10 MPa, 175.01 MPa, and 198.14 MPa, respectively. Similarly, the hardness also increased up to 30.1 HRF, 48.1 HRF, and 66 HRF, respectively. Microstructure observation also confirmed that a 10% SiC fraction results in less defect and good wettability. The addition of 10% SiC and 1% Mg resulted in maximum tensile strength and hardness and the best microstructure.
Layer Height, Temperature Nozzle, Infill Geometry and Printing Speed Effect on Accuracy 3D Printing PETG Amirur Ridho Muhammad; Rahma Rei Sakura; Dedi Dwilaksana; Sumarji; Muhammad Trifiananto
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 2 (2022): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i2.1649

Abstract

The manufacturing industry has grown rapidly in the last few decades. 3D printing is one of the technologies of manufacturing, this technology makes products by adding filaments that are stacked systematically to become a finished product. PETG filament is a polymer with the name polyester but with glycol modification. This study aims to determine and understand the effect of the process parameters layer height, nozzle temperature, infill geometry and printing speed. This research method uses the Taguchi method with L16 and various parameters; layer height 0.12mm; 0.16mm; 0.2mm; 0.28mm, infill geometry cross; cubic; tri-hexagonal; triangles, nozzle temperature 220ºC; 230ºC; 240ºC; 250ºC and printing speed 40mm/s; 50mm/s; 60mm/s; 70mm/s. After testing, it can be concluded that the most influential parameters are sequentially; layer height, nozzle temperature, printing speed, and infill geometry with layer height parameters have the dominant influence, nozzle temperature and printing speed parameters have a balanced influence and infill geometry parameters have the least influence.
PENAMBAHAN MINYAK GORENG PADA PCM PARAFFIN GUNA MENINGKATKAN KARAKTERISTIK PENYIMPANAN TERMAL PADA MEDIA PENYIMPAN PANAS Muhammad Katibi Vanhas; Nasrul Ilminafik; Rahma Rei Sakura; Andi Sanata; M Nurkoyim Kustanto; FX Kristianta
STATOR: Jurnal Ilmiah Teknik Mesin Vol 5 No 2 (2022): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

The number of energy demand these days is very high. This shows the need for new inonovation to solve the problem of energy needs, one of which is the use of Phase Change Material (PCM) as a heat exchanger material. The purpose of this research is to know the characteristics of PCM with addition cooking oil and paraffin. The percentage of cooking oil and paraffin are 30%, 40%, and 50% of total volume. The research was start with heating process during 1 hours with temperature ± 25oC. Result of this research shows PCM paraffin - cooking oil with 50% mixture is the best cooling speed PCM, next is PCM paraffin - cooking oil 40% mixture, and the last is PCM paraffin - cooking oil with 30% mixture. On the cooling process, the 30% cooking oil mixture can hold the temperature longers than the other, while the 40% cooking oil mixture has second position, and the last is 50% cooking oil mixture. The conclusion is the addition of cooking oil can improve thermal conductivity of PCM.
PENGARUH LAJU TEMPERATUR SOLIDIFIKASI TERHADAP KRISTALINITAS NANO SENG OKSIDA DENGAN METODE SIMULASI MOLEKULAR DINAMIK Novel Bagas Satrio Wibowo; Sumarji .; Rahma Rei Sakura; Dedi Dwilaksana; Robertoes Koekoeh KW; Hary Sutjahjono; M Asrofi
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

The presence of nano technology has an important role in utilizing a material, considering the use of nanotechnology in Indonesia has been applied in various fields, in the formation of nano zinc oxide (ZnO) there is a solidification process where this process is the final stage in ZnO nano formation. In the dynamic molecular simulation method, the nano ZnO solidification process will be observed with variations in the solidification temperature rates of 1010K/s, 1011K/s, 1012K/s, using LAMMPS software (Large-scale atomic / molecular massively parallel simulators) and OVITO as Help software from the results of the simulation process and VESTA-JP Minerals. From the simulation results, it can be concluded that the greater the solid temperature rate value the lower the nano ZnO crystallinity will be (amorphous).
Penerapan Practical Experience untuk Memperkenalkan Sains pada Lingkungan SD Negeri Jember Lor 01 Jember Rahma Rei Sakura; Hery Indria Dwi Puspita; Rudianto Rudianto; Wazirotus Sakinah; Pratama Yuli Arianto
PEKAT: Jurnal Pengabdian Kepada Masyarakat Vol. 2 No. 2 (2023): Oktober
Publisher : Puslitbang Sinergis Asa Professional

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Abstract

Science is a system obtained through the scientific method of research. The application of scientific knowledge can be found in various fields such as agriculture, medicine, pharmacy, and technology. The development of scientific knowledge in various fields is the role of the academic community. Community service is one of the three main duties of higher education institutions. Community service activities are carried out by conducting visits to Jember Lor 01 Public Elementary School in order to enhance young generations' knowledge of science through primary schools. The method used in community service is practice experience, which is a learning process that provides practical experiences to facilitate students' understanding of the subject matter. The practices conducted include telekinetic and lava lamp experiments using easily accessible materials. The practices are done in groups and accompanied by one person from the community service team. Based on the enthusiasm of the participants, this activity has been very beneficial in increasing the interest in learning about science from an early age. The synchronization of this community service activity with the natural science subjects is necessary to help students understand the theoretical lessons taught by teachers.
Effect of current, time, ethanol concentration, and pH electrolyte on ZnO coated carbon fiber using electrochemical deposition method Salahuddin Junus; Gindeka Bimara Aryantaka; Rizky Akhmad Prayogi; Mochamad Asrofi; Rahma Rei Sakura; R. Puranggo Ganjar Widityo; Robertus Sidartawan
Mechanical Engineering for Society and Industry Vol 3 No 2 (2023)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.10493

Abstract

One of the recent developments in carbon fiber is using nano zinc oxide (ZnO) as a coating on carbon fiber to create piezoelectric materials. Piezoelectric materials can generate electricity when subjected to mechanical pressure or strain, and vice versa. ZnO nanomaterials have been a focal point of research due to their high surface-to-volume ratio and high reactivity. This study reported on the use of ZnO for coating agents in carbon fiber sensors. The novelty in this research is the composition of current, time, ethanol concentration, and pH electrolyte to produce the optimum composition of piezoelectric material. The process was conducted using an electrochemical method, which converts electrical energy into chemical energy through electro-deposition. This study considers four independent variables: electrolyte current (1.2 A and 1.4 A), electrolyte pH (2.0, 4.0, and 6.0), ethanol concentration (70% and 96%), and coating duration (90, 180, and 270 seconds). The results show that 1.4 A produces the highest average voltage, followed by electrolyte pH 6 and 70% ethanol concentration. The best coating time was 270 seconds producing the highest average voltage. Micro and SEM confirm that 1.4 A produced a thicker and more uniform layer compared to 1.2 A. High pH, 70% ethanol concentration, and longer coating time also contributed to the formation of thicker layers. XRD test shows that the layers formed had amorphous and hexagonal crystal structures. The average crystal diameter size varies depending on the combination of independent variables used in the coating process. With these results, piezoelectric has potential as a pulse sensor material.
Penigkatan Kualitas Produk Material Komposit Fiberglass Menggunakan Vaccum Assisted Resin Infusion di Industri Wangi Fiberglass Banyuwangi Asrofi, Mochamad; Dwilaksana, Dedi; Sakura, Rahma Rei; Junus, Salahuddin; Hentihu, M. Fahrur Rozy; Yudhistiro, Danang; Syuhri, Skriptyan Noor Hidayatullah; Taufik, Taufik
Medani : Jurnal Pengabdian Masyarakat Vol. 2 No. 3 (2023): Desember 2023
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jpm.v2i3.366

Abstract

Pembuatan komposit sebagai pengganti material logam membutuhkan teknologi sebagai penunjang produksi sehingga menghasilkan banyak produk dengan kualitas yang bagus. Bahan komposit mempunyai beberapa keunggulan diantaranya massa jenis ringan dan sifat mekanik yang baik. Umumnya, bahan komposit terdiri dari dua penyusun yaitu matriks dan fiber. Matriks berfungsi sebagai pengikat dan fiber berguna sebagai penguat struktur komposit. Metode pembuatan produk tersebut yaitu vaccum, casting, dan hand lay-up. Hasil menunjukkan produk komposit dengan vaccum assisted resin infusion (VARI) mempunyai kualitas yang baik dan minim cacat dibandingkan dengan casting dan hand lay-up. Metode VARI dapat diaplikasikan di industri manufaktur komposit fiberglass. The fabrication of composites as a substitute for metal materials requires technology to support the production to produce many products with good quality. Composite materials have several advantages, including light density and good mechanical properties. Generally, composite materials consist of two components, namely matrix and fiber. The matrix functions as a binder and the fiber is useful as a reinforcement for the composite structure. The fabrication methods of these products are vacuum, casting, and hand lay-up. The results show that composite products with vacuum-assisted resin infusion (VARI) have good quality and minimal defects compared to casting and hand lay-up. The VARI method can be applied in the fiberglass composite manufacturing industry.
EFFECT OF VOLUME FRACTION OF GENETICALLY MODIFIED ORGANISM (GMO) SUGARCANE BAGASSE FIBER ON THE MECHANICAL PROPERTIES AND MORPHOLOGY OF BIOCOMPOSITE Anuary Dwi Rosyid, Wafa Prasetia; Sakura, Rahma Rei; Djumhariyanto, Dwi; Asrofi, Mochamad; Setyawan, Digdo Listyadi; Sugiharto, Bambang; Junus, Salahuddin; Dwilaksana, Dedi
ROTOR Vol 16 No 2 (2023)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v16i2.41551

Abstract

Science and technology are currently developing in all fields, such as vehicle construction, building construction, industry, and materials engineering. Especially in the field of material engineering used for the manufacture of composite materials. Currently the transition of materials from metal to composites is also in great demand in various fields including in the automotive, transportation, shipping, aerospace, health, and various other fields. In the components of a vehicle, the components that have the most potential to be reduced are the main structural components, namely the floor, body, and ribs. Efforts to reduce the weight of the material in these components are carried out to reduce the amount of fuel consumption, so the ratio of strength and density of a material is one of the important properties that needs to be considered. This study used the hand lay up method with a comparison of volume fraction variations of 15%: 85% and 20%: 80%. With the aim of adding volume fractions with optimal combinations, it is hoped that the tensile strength will get better. The highest average tensile strength is with a volume fraction ratio of 15%: 85% of 19.04 MPa. While the lowest average tensile strength is with a volume fraction ratio of 20%: 80% of 17.78 MPa. It can be concluded that with increasing fiber volume fraction, the tensile strength decreases. This happens because there are several defects in the form of holes and voids which indicate poor bonding between the fibers and the matrix. Keywords: PRG sugarcane fibers, volume fraction, epoxy, tensile properties
ANALISA PROSES PENGELASAN GESEK PADA PENYAMBUNGAN BAJA AISI 1010 DAN AISI 1050 DENGAN VARIASI WAKTU DAN PUTARAN SPINDEL MENGGUNAKAN MESIN BUBUT Andana, Himawan D; Hermawan, Yuni; Sakura, Rahma Rei; Trifiananto, Muhammad; Hentihu, M Fahrur Rozy
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

The development of the welding process in the current era is growing, especially in terms of components of building construction tools and machines. Friction welding is included in the type (solid state) or without filler metal (filler) in the process, the compressive force can be utilized from the friction obtained between the two workpieces to carry out the joining process. Friction welding is a solution to overcome problems that are difficult to solve using fusion welding, friction welding can be applied to two dissimilar metals while other welding methods are almost impossible. The purpose of this study was to analyze the friction welding process on AISI 1010 and AISI 1050 steel joints with variations in welding time and spindle rotation using a lathe. The combination of independent variables that can produce the highest tensile test value, namely spindle rotation of 1170 rpm and 50 seconds of welding time can produce a tensile test value of 42.55 kgf/mm2. Meanwhile, the combination of independent variables that produced the lowest tensile test value was the spindle rotation of 900 rpm and 70 seconds of welding time, namely 30.14 kgf/mm2. The most significant independent variable is spindle rotation with 80%.
PENGARUH VARIASI PARAMETER WIRE-CUT EDM MITSUBISHI BA-8 TERHADAP KEKASARAN PERMUKAAN BAJA SKD 61 Putratama, Panji Hastawirata; Jatisukamto, Gaguk; Sakura, Rahma Rei; HT Prasetiyo, Dani; Zainul M, Aris
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

Wire-cut EDM is a machining process used to shape precision machine components. The basic principle of wire-cut EDM is the erosion of the workpiece through spark discharges in a dielectric fluid. The spark discharge is caused by a positive electrode approaching the negatively charged workpiece, creating a short circuit that generates heat energy. Previous research was conducted with factors such as current, wire speed, on-time, and variable frequency, resulting in the best surface roughness value of 6 µm. This study aims to determine the effect of parameters such as current, voltage, and wire speed on the response of surface roughness, using the Taguchi method. The workpiece used was SKD 61 steel with 600mm x 50mm x 5mm dimensions. Cutting was done at currents of 4, 6, and 9 (Amperes), voltages of 4, 5, and 6 (Volts), and wire speeds of 8, 10, and 12 (m/m). The results of this study showed the best surface roughness value of 2.540 µm with an S/N ratio of -8.09553 at a current of 4A, voltage of 4V, and wire speed of 8m/m. After optimization, a higher S/N ratio of -8.018 was achieved. Data analysis with ANOVA showed that the effect of factors on the response yielded an F-value greater than the F-table value for all factors, indicating that all factors had a significant impact. The percentage contribution of all factors was as follows: Current at 82.46%, Voltage at 3.36%, and Wire speed at 2.53%. Keywords: wire-cut EDM, taguchi method, surface roughness.
Co-Authors Adha Mahendra, Erlian Agus Triono Alfredo Bayu Satriya Amir Biqi Amirur Ridho Muhammad Andana, Himawan D Andi Sanata Anisya Delima Anuary Dwi Rosyid, Wafa Prasetia Ardhyananta, Hosta Bambang Sugiharto Chamim Handoyo Dani Darojat Iskandar Dedi Dwilaksana Digdo Listyadi, Digdo Dwi Djumhariyanto Eriska Eklezia Dwi Saputri FX Kristianta Gaguk Jatisukamto Gindeka Bimara Aryantaka Hary Sutjahjono Hayun Indra Nur Iman Hery Indria Dwi Puspita HT Prasetiyo, Dani Intan Hardiatama Istiqomah Rahmawati M Arief Hidayat M Asrofi M Dimyati Nashrullah M Nurkoyim Kustanto M. Fahrur Rozy Hentihu Mahros Darsin Mochamad Asrofi Mochamad Trifiananto Moh. Wafir Muhammad Katibi Vanhas Muhammad Trifiananto Nasrul Ilminafik Nasrul Ilminnafik Naufal Fardio Albajili Novel Bagas Satrio Wibowo Pratama Yuli Arianto Primaningtyas, Widya Emilia Puranggo Ganjar Widityo Putratama, Panji Hastawirata Riko Septian Ririn Endah Badriani, Ririn Endah Rizky Akhmad Prayogi Robertoes Koekoeh KW Robertus Sidartawan Rozy Hentihu, M. Fahrur Rudianto Rudianto Salahuddin Junus Santoso Mulyadi Suheni Suheni Sumarji Sumarji Syuhri, Skriptyan Noor Hidayatullah Taufik Taufik Tri Vicca Kusumadewi Wazirotus Sakinah Welayaturromadhona Yudhistiro, Danang Yuni Hermawan Yusron Maulana, Raden Muhammad Zainul M, Aris