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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Elemen Agroteknika Mechanical Engineering for Society and Industry Automotive Experiences Journal of Fibers and Polymer Composites Medani : Jurnal Pengabdian Masyarakat Jurnal Polimesin
Salahuddin Junus
Teknik Mesin Fakultas Teknik Universitas Jember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Transportation

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ANALISIS PENGARUH JARI-JARI SUDUT BLUFF BODY TERHADAP GETARAN KANTILEVER PADA SISTEM VORTEX INDUCED VIBRATION Achmad Murdiono; M Edoward Ramadhan; Robertoes Koekoeh KW; Rika Dwiqoryah; Salahuddin Junus; Yuni Hermawan
STATOR: Jurnal Ilmiah Teknik Mesin Vol 5 No 2 (2022): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

Harvesting energy merupakan sebuah teknologi yang digunakan untuk mengumpulkan energi dari satu atau lebih sumber energi disekitarnya dan mengkonversi menjadi bentuk energi lain. Vortex-Induced Vibration (VIV) merupakan harvesting energy yang memanfaatkan fenomena getaran yang diinduksikan oleh vortex untuk mengkonversikan energi mekanik menjadi energi listrik dengan memanfaatkan gerakan osilasi bluff body. Penelitian ini bertujuan untuk mengetahui pengaruh jari-jari sudut bluff body terhadap getaran mekanik yang di induksikan, kestabilan osilasi bluff body dan tingkat resonansi getaran. Metode penelitian dilakukan dengan metode eksperimen menggunakan wind tunnel untuk mengetahui pengaruh bentuk bluff body terhadap getaran mekanik yang diinduksikan oleh vortex sebagai penghasil tegangan listrik untuk mendeteksi getaran yang dihasilkan. Penelitian ini memvariasikan jari-jari sudut bluff body dan juga kecepatan angin dimulai dari 0,5 m/s sampai 3 m/s. Hasil penelitian menunjukkan jari-jari sudut bluff body sangat berpengaruh terhadap getaran mekanik yang di induksikan oleh vortex di belakang bluff body. Semakin kecil jari-jari sudut bluff body semakin besar amplitudo getaran yang dihasilkan. Amplitudo tertinggi diperoleh dengan variasi jari-jari sudut bluff body 5mm. Untuk kestabilan osilasi tidak dipengaruhi oleh jari-jari sudut bluff body. Dari grafik hasil penelitian, bluff body berosilasi pada area osilasi yang tetap dan tidak tumbuh ataupun berkurang tanpa batas sehingga bisa dikatakan osilasi bluff body stabil.
Experimental Study on the Effect of Magnetic Fields on Combustion Characteristics of Biodiesel from Nyamplung (Calophyllum Inophyllum) Imam Rudi Sugara; Nasrul Ilminnafik; Salahuddin Junus; Muh Nurkoyim Kustanto; Yuni Hermawan
Automotive Experiences Vol 6 No 1 (2023)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.8328

Abstract

Nyamplung (Calophyllum Inophyllum) is an environmentally friendly alternative fuel that can be used to replace the consumption of fossil fuels. The purpose of this experiment was to analyze the effect of magnetic fields on the premixed flame of biodiesel from Calophyllum Inophyllum, the experiments were carried out on a bunsen burner. Fuel evaporation uses a temperature of 473 K and the equivalent ratio used is between ϕ 0.7; 0.8; 0.9; 1.0; 1.1 and 1.2. This experiment used a modified magnet that has magnetic force in 11.000 gausses with magnetic variations N-S, S-N, N-N, and S-S. Experiments revealed that magnetic fields have a significant effect to increase the value of laminar flame speed on magnetic variations point at S-S 3.8%; N-N 4.8%; S-N 17.09%, and the highest laminar flame speed were at point N-S 20.7%. The enhancement value of laminar flame speed indicated more optimum combustion processes. The magnetic fields can influence the O2, and H2O and change the orientation of the hydrocarbons which makes it easier for O2 and fuel to carry out the oxidation process, resulting in more optimal combustion.
PENGARUH PENAMBAHAN Mg DAN Sr TERHADAP KEKERASAN KOMPOSIT ADC12/nano-Al2O3 DENGAN METODE STIR CASTING Ahmad Al Kautsar; Salahuddin Junus; M Trifiananto; Imam Sholahudin; Aris Zainul Muttaqin
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

Metal matrix composites generally use Aluminum (Al) as its matrix because of its low density, high processing, and high ductility. Ductility is an important factor that must be possessed on the metal matrix composite because the amplifier used is rigid and brittle. Alumina (Al2O3) is used as a reinforcing particle in a metal matrix composite because it has good thermal stability and hardness as well as a high Young modulus. Aluminum-silicon alloys (Al-Si) are excellent alloys of good melting, which have a good surface, without brittleness, and are excellent for cast alloys. The addition of magnesium (Mg) resulted in a modified rate of silicone eutectic for Al-Si-Mg, with enhanced magnesium (Mg) levels, increased alloy tensile strength but a decreasing percent elongation value. Strontium (Sr) is a common element used to modify eutectic and Si-shaped phases of rough acicular into finer and rounded fibrous forms. A metal matrix composite with a nano-sized Al2O3 particle amplifier can be fabricated using stir casting method with the addition of Mg as a Al2O3 wetting agent. Test results of the addition of Mg, Sr, and nano-Al2O3 to the highest hardness of ADC12 / nano-Al2O3 composites were found in ADC12-8Mg-0.03Sr / 2.5nano-Al2O3 variation at 78.92 HRB.
Studies on Tensile Strength, Fracture Surface and Biodegradation of Biocomposite from Polyvinyl Alcohol (PVA) Filled by Sugarcane Bagasse Fiber Mochamad Asrofi; Reza Marinanda Fajar; Dwi Djumhariyanto; Salahuddin Junus; R. A. Ilyas; M. R. M. Asyraf; L Rajeshkumar
Journal of Fibers and Polymer Composites Vol. 2 No. 1 (2023): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v2i1.75

Abstract

Synthetic plastic is a material that is difficult to decompose in the environment and causes serious problems in long term such as an increase in the volume of waste. To reduce plastic waste, biodegradable composite (biocomposite) is expected to overcome this problem. Natural cellulose fiber can be used as a filler in biopolymer matrix based biocomposite. This study aims to determine the tensile properties, fracture morphology, and biodegradation rate of biocomposite from Polyvinyl Alcohol (PVA) and sugarcane bagasse fiber. The test of biocomposite samples was carried out with a tensile test, scanning electron microscopy (SEM), and soil burial test. The results show that the highest tensile strength and modulus elasticity was in PVA pure film for 2.15 MPa and 3.468 MPa, respectively. The addition of cellulose fiber from sugarcane bagasse in the PVA matrix does not have a strengthening effect on the tensile strength of the biocomposite. This is due to the presence of porosity, agglomeration, and poor bonding between the matrix and fiber according to the SEM observation. The biodegradation rate showed that all biocomposite samples were degraded in the soil and had weight loss above 40% after 15 days of burial in the soil.
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.
A study on Flame Characteristics Premixed Burning by Giving Magnetic Field Induction Deny tomy andrianto; Muh. Nurkoyim Kustanto; Yuni Hermawan; Nasrul Ilminnafik; Salahuddin Junus
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3497

Abstract

This study aims to compare the effect of magnetic field induction on the characteristics of the fire resulting from the combustion of premixed biodiesel calophyllum inophyllum . Further research on premixed combustion flames due to magnetic field induction. As time goes by, petroleum is currently running low, therefore alternative biofuels are needed. One type of non-food vegetable oil is Jatropha and calophyllum inophyllum  oil, besides not being consumed, it can be processed into biodiesel as fuel. To get a more effective and efficient flame, you can apply a magnetic field effect to the fire, especially in terms of the burning rate of the fire. The experimental research method is to heat calophyllum inophyllum biodiesel until it is in the form of steam, then flow it to the burner which will then be given air which is controlled by the flow mass. Then the fire is ignited and the mass of the air flow is increased until the fire is lifted until it is extinguished. Two magnets are placed between the burners by varying the direction of the magnetic field N-S, N-N and the results of this study are the shape of the flame. The resulting fire is more transparent, clearer and more visible. The direction of the N-S magnetic field causes the temperature to be higher than the direction of the N-N magnetic field. The high and low of the flame is affected by the direction of the magnetic field, the stronger the N-S magnetic field. The magnetic field can affect the burning speed of the biodiesel flame. In a poor mixture (ϕ 1) in the presence of magnetic influence, the rate of fire is lower without the influence of a magnetic field, but in a rich mixture (ϕ 1) in the presence of a magnetic influence, the rate of fire is higher than without the influence of a magnetic field. This is due to the magnetic influence that induces oxygen. Oxygen is paramagnetic, so it can be attracted by magnetic fields.
Effect of nano SiC addition on mechanical properties of Al-Nano SiC composite materials SS304 woven wire using stir casting method Alfi Hasan; Pieter Muhammad Iko Marrendra; Salahuddin Junus; Mahros Darsin
Jurnal POLIMESIN Vol 21, No 4 (2023): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i4.3494

Abstract

The wide variety of applications in various industries, such as automotive, aerospace, construction, and electronics, aluminum is one of the metals that needs to improve its mechanical properties. This study aims to determine the effect of adding reinforcing powder using the stir casting method on the mechanical properties of the Al-nano SiC/SS304 Wire Woven Composite material. The method used in this study is an experiment with the addition of a matrix to the composite material. The addition of nano metal was carried out to modify the mechanical properties of the aluminum material. Variation of the composition of each specimen using the volume fraction of nano-SiC (1%, 3%, 5%) and 4% Mg and the addition of woven SS304 wire on the tensile strength and hardness tests. The highest tensile test results for the 5% volume fraction variation were 149 MPa and the hardness test was obtained at 69 HRB for the 5% volume fraction variation
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
ANALISIS KEKASARAN PERMUKAAN PADA PROSES PENGEBORAN ALUMINIUM 6061 Jannah, Betriqil; Sanata, Andi; Koekoeh KW, Robertoes; Junus, Salahuddin; Ramadhan, M Edoward; Sutjahjono, Hary
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

This research aims to determine the influence of spindle speed, tool diameter, and coolant on the surface roughness in the process of drilling Aluminum 6061 and identify the most optimal variable. Surface roughness is significantly affected by the spindle speed variable, which contributes to 46,47% of the outcome. The coolant variable contributes 31,17%, while the tool diameter variable has the smallest percentage contribution of 9,61%. The process variables for spindle speed (535 Rpm, 865 Rpm, 1520 Rpm) resulted in surface roughness values of (1,467 μm, 1,349 μm, 2,079 μm) respectively. For the tool diameter variable (8 mm, 10 mm, 12 mm), the surface roughness values were (1,765 μm, 1,701 μm, 1,429 μm) respectively. Regarding the coolant variable (water, dromus, oil), the surface roughness values were ((1,995 μm, 1,387 μm, 1,541 μm) respectively. The most optimal surface roughness was achieved with a spindle speed of 865 Rpm, resulting in a surface roughness value of 1.349 μm. Similarly, a tool diameter of 12 mm resulted in a surface roughness value of 1.429 μm, and the use of dromus as a coolant resulted in a surface roughness value of 1.387 μm. Keywords: Surface Roughness, Drilling, Aluminum 6061
Co-Authors Achmad Murdiono Afril Priyanto Agung Budi C Agung Budi Cahyono Agus Pramono Agus Triono Ahmad Adib Rosyadi Ahmad Al Kautsar Ahmad Al Kautsar Ahmad Wafi Alahmadi, Mohammed Alfi Hasan Andi Sanata Andi Sanata Anne Zulfia Anuary Dwi Rosyid, Wafa Prasetia Aris Zainul Muttaqin Aris Zainul Muttaqin Bambang Sugiharto Danang Yudistiro Dedi Dwi Laksana Dedi Dwilaksana Deny tomy andrianto Devita Amelia Digdo Listyadi, Digdo Dwi Djumhariyanto Gaguk Jatisukamto Gindeka Bimara Aryantaka Haidzar Nurdiansyah Hary Sutjahjono Ilminafik, Nasrul Ilyas, Rushdan Ahmad Imam Rudi Sugara Imam Sholahuddin Imam Sholahudin Intan Hardiatama Jannah, Betriqil Koekoeh KW, Robertoes L Rajeshkumar Lilis Mariani Lilis Mariani, Lilis M Edoward Ramadhan M Trifiananto M. Fahrur Rozy M. Fahrur Rozy Hentihu m. Fahrur Rozy R M. R. M. Asyraf M.Ginanjar Widodo Mukti Mahros Darsin Masfeya Eka Hermiansyah Melbi Mahardika Melisa Melisa Mochamad Asrofi Mochammad Edoward R Mohammad Alfian Ilmy Muh Nurkoyim Kustanto Muh Nurkoyim Kustanto Muhammad Abduh Muhammad Kurniawan Nashrullah, M Dimyati Nasrul Ilminnafik Nasution, Annio Indah Lestari Novi Nur H Novi Nur Hamimah Pieter Muhammad Iko Marrendra Pradiza, Revvan Rifada Puranggo Ganjar Widityo Puranggo Ganjar Widityo R. A. Ilyas Rahma Rei Sakura Rahman, Purnama Auliya Rahmatullah Tites Wicaksono Ramadhan, M Edoward Reza Marinanda Fajar Rika Dwiqoryah Riko Septian Riko Septian Rizky Akhmad Prayogi Robertoes Koekoeh KW Robertus Sidartawan Robertus Sidhartawan Santoso Mulyadi Setyo Pambudi Setyo Pambudi Sujito Sujito Sumardi Sumardi Sumarji Syuhri, Skriptyan Noor Hidayatullah Taufik Taufik Wiradika, Yudha Wisnu Kuncoro Yanuar Alditya Nugraha Yayang Saif Izzudin Yudhistiro, Danang Yuni Hermawan