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Contact Name
Amrifan Saladin Mohruni
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jmse.mech@unsri.ac.id
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Mechanical Engineering Department Faculty of Engineering Sriwijaya University
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INDONESIA
Journal of Mechanical Science and Engineering
Published by Universitas Sriwijaya
ISSN : -     EISSN : 23549467     DOI : -
Core Subject : Engineering,
Editors receive manuscripts in Mechanical Engineering from various academics, researchers and industry practitioners. The authors in the Journal of Mechanical Science and Engineering derived from various Higher Education institutions and national research institutes. Editorial Board of Journal of Mechanical stated that online media is both a scientific and specialized publishing scientific articles on original scientific research results (original) and review the field of mechanical engineering science. Publication covering area of research and review papers are as follows but not limitted to: Thermo-Fluid, ,Energy, Machine Design, Manufacture Engineering, Materials Engineering, etc
Arjuna Subject : -
Articles 27 Documents
The Influence of Matrix Banana Stem Fiber Volume Fraction Recycled Polypropylene (RPP) toward Bending Test Kusuma, Diah Pratiwi; Chandra, Hendri; Rajagukguk, Tumpal Ojahan
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Sriwijaya University

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Abstract

ABSTRAKSerat alam telah terbukti sebagai material yang kuat, mampu untuk menggantikan serat sintetik sebagai penguat. Serat batang pisang kepok yang memiliki kekuatan tarik 68,44 MPa dengan bundalan rata-rata 0,698 mm salah satu serat yang memiliki potensi sebagai penguat untuk polymer material komposit. Pada material komposit bermatriks recycled polypropylene (RPP) berpenguat serat batang pisang kepok dapat menahan beban yang diterima material komposit. Sedangkan recycled polypropylene (RPP) sebagai pengikat serat batang pisang, bekerja menahan beban dan melindungi serat dari kerusakan.  Hasil pengujian yang paling optimal terdapat pada volume fraksi 35% fiber : 65% matriks dengan  tegangan bending 122,09 N/mm2, modulus elastisitas 2975 MPa, momen bending 126,59 N/mm2 dan tegangan lentur 64,34 MPa. Pada pengamatan SEM fraksi volume 35% filler : 65% matriks paling optimal karena adanya ikatan matriks dan serat menyatu dengan sempurna. Dari penelitian ini dapat disimpulkan bahwa pengaruh fraksi volume serat batang pisang kepok sebagai penguat (fiber) dan recycled polypropylene (RPP) sebagai pengikat (matriks) pada material komposit akan mempengaruhi kekuatan material komposit lebih kuat dan getas. Apabila ditinjau dari keseluruhan pengujian yang dilakukan maka fraksi volume yang paling optimal terdapat pada fraksi volume 35% filler : 65% matriks.
Characteristics of Mixture fuel of Biodiesel from Waste Cooking Oil and Solar used as fuel in Diesel Engine Arita, Susila; Kadir, Marwani Zahri; Miskah, Siti
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Sriwijaya University

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Abstract

Abstract Biodiesel from waste oil fried food out of fuel can be used as an alternative to replaced diesel fuel or diesel. Biodiesel blended with diesel (B0) at the level of a certain ratio so obtained B5, B10, B15 and B20 (B5 is a mixture of 5% biodiesel and 95% diesel, etc.) is used as fuel in diesel engines. Then tested for their physical properties such as heating value, cetane number, and flash point. Performance compared to diesel engines that use diesel engines (B0). Engine operated on constant engine revolution in 1500, 1750, 2000, 2250 and 2500 rpm. From the test results in fact indicate that the B5 fuel to obtain the best performance of the engine at 2000 rpm (engine revolution).. At this engine revolution produced the lowest specific fuel consumption of 0.34 kg / kWh, thermal efficiency of 24.02%  while the effective power on all fuels are the same ie 1:26 kw .   Keywords: Biodiesel, cooking oil, diesel fuel, diesel engine
Influence of Blending of Diesel Certified and Biodiesel CPO on Efficiency of 60 MMT SB Boiler Type Sumardi, Novia; Ellyanie, Ellyanie; Moeksin, Rosdiana
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Sriwijaya University

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Abstract

Abstract Combustion is the process of mixing  oxygen and carbon in speed and produces heat. Oxygen  from the air, while carbon derived from fuel. Combustion  boilers as a chemical process of unification of the fuel and oxygen from the air with the speed of a particular reaction that produces energy. Calculation of the combustion process is the starting point  the design of boilers, furnaces and other appliances that generate heat from the combustion process derived from the number of elements involved in a chemical reaction, the amount of heat generated and the efficiency of combustion. The fuel is a mixture of diesel and biodiesel certified crude palm oil, ratio B0, B5, B10, B15, B20, B30 testing using Fire Tube BoilersSB60MMT. From the ultimate analysis and dry flue gas emissions (gas Analyzer), then calculated based on stoichiometric combustion and efficiency using the indirect method, the calculation results obtained from the more mixed crude palm oil biodiesel is added then the content of SO2, CO, NOx  increasingly reduced. Also obtained the largest heat loss due to dry flue gas and 8,209% heat loss due to evaporation of water formed in  H2 fuel efficiency of 7,002% to 85.637% on the  blend B20. Keywords: Solar Certified, CPO Biodiesel, Fire Tube Boilers, Emissions, Effici
Effect of The Pressure of the Squeeze Process on the Hardness and Micro Structure of Recycled Aluminum Materials Nukman, Nukman; Yanis, Muhammad; kurrahman, taufik
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Sriwijaya University

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Abstract

Ringkasan Proses pengecoran squeeze menghasilkan produk yang mendekati ukuran akhir dengan kualitas yang baik. Struktur mikro hasil pengecoran squeeze tampak lebih padat, homogen dan sifat mekanik yang baik bila dibandingkan dengan hasil pengecoran tuang. Material yang dipergunakan daur ulang alumunium berupa 25 kg piston, 25 kg velg dan 25 kg berupa campuran (kanvas rem, tutup mesin, dan perabotan rumah tangga) yang di lebur didalam dapur dan proses pencetakan sistem dengan proses DSC. Logam cair dituangkan ke dalam die pada temperatur 750°C, lalu dipres dengan selama 60-70 detik. Proses pemberian tekan di mulai pada penekan 30 MPa dengan durasi penekanan 75 detik. Ulangi untuk penekanan 50,70,90,110 MPa, 130 dan 150 Mpa. Kemudian benda cor di keluarkan dari die (cetakan). Hasil pengujian Komposisi hasil daur ulang alumunium 84,75 % Al dan 8,985 % Si, dengan tingkat kekerasan permukaan pada tekanan 130 MPa sebesar 89,74 HBN. Proses pengecoran squeeze meningkatkan kekerasan permukaan sebesar 22 % Proses pengecoran squeeze meningkatkan kekerasan permukaan sebesar 22 %. Kekerasan permukaan hasil squeeze sangat di pengaruhi oleh temperatur penuangan, waktu penekanan dan besarnya gaya penekanan. Struktur mikro material cenderung merapat dan memendek seiring dengan peningkatan tekanan yang diberikan. Kata Kunci : Pengecoran Squeeze, Struktur mikro dan Kekerasan. Abstract Squeeze casting process to produce products that approach the final size with good quality. Squeeze casting microstructure results appear more dense, homogeneous and good mechanical properties when compared with the results of foundry castings. Recycled materials used in the form of 25 kg piston aluminum, 25 kg and 25 kg wheel in the form of a mixture (brake, engine cover, and household items) are in the process of melting and molding in the kitchen with the DSC system. molten metal into the die at a temperature of 7500C, and then pressed for 60-70 seconds. The process of granting press at start at 30 MPa pressure with a duration of 75 seconds emphasis. Repeat for emphasis 50,70,90,110 MPa, 130 and 150 MPa. Then remove it from the body in die cast (mold). Results of testing of recycled aluminum composition 84.75% Al and 8.985% Si, with surface hardness 130 MPa at a pressure of 89.74 HBN. Squeeze casting process increases surface hardness by 22% squeeze casting process increases surface hardness by 22%. Hardness of squeeze surface is influenced by the pouring temperature, the time pressure and the force suppression. Microstructure of the material tends to move up and retracts with increasing applied pressure. Keywords: Squeeze Casting, Microstructure and Hardness.
The Carburizing Process of Low Carbon Steel with Charcoal Media Yahya, Yahya; Nukman, Nukman; Chandra, Hendri
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Sriwijaya University

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Abstract

Ringkasan Proses karburisasi dilakukan untuk meningkatkan mutu kekuatas suatu baja karbon rendah dengan biaya yang rendah. Material yang digunakan adalah jenis baja karbon rendah dengan nilai karbon 0,25. Proses karburisasi pada baja karbon rendah dilakukan pada temperatur 900oC dengan holding time 90 menit menggunakan media arang tulang kambing dan tempurung kelapa. Penggunaan karburiser arang tulang kambing menghasilkan nilai kekerasannya lebih tinggi dari baja karbon dengan media arang tempurung kelapa. Hasil pengujian nilai karbon baja setelah proses karburisasi dengan tempurung kelapa adalah 0,423 sedangkan setelah proses karburisasi dengan tulang kambing nilai karbon nya hanya 1,593. Kata Kunci : Proses Karburisasi, Uji kekerasan, Uji Tarik, Uji Impak, dan struktur mikro. Abstract Carburizing process is carried out to improve the power quality of a low carbon steel with a low cost.The material used is a type of low carbon steel with a carbon value of 0.25. Carburizing process on medium carbon steel at a temperature of 900°C with a holding time of 90 minutes using goat bone and coconut shel char medial. The use of goat  bone charcoal karburiser produces higher hardness values of carbon steel with coconut shell charcoal media. Results of testing the value of carbon steel after carburizing processes with coconut shell was 0,423 whereas after carburizing process with goat bone carbon value of only 1,593 Keywords: carburizing process, hardness test, Tensile Test, Impact Test, and microstructure.
New Performance with Matrix Composites of Used Plastic, Fiber of Red Pinang Sheath and Bamboo Nukman, Nukman; hadi, qomarul; Fusito, Fusito
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
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Abstract

Ringkasan Pemanfaatan plastik bekas menjadi komposit, khususnya berbahan plyproplene (PP) telah dapat dilakukan dengan cara menambahkan serat Bambu dan Pelepah Pinang Merah. Matriks PP dipanaskan dalam satu alat pemanas untuk dicairkan kemudian ditambahkan masing-masing serat alam bambu dan juga pinang merah. Hasil pengujian sifat mekanik telah dibandingkan matriks tanpa penambahan serat dengan matriks yang berserat. Pengujian menujukkan bahwa sifat mekanik dari kompisit telah meningkat dengan penambahan serat alami. Kekuatan mekanik dengan penambahan serat bambu lebih besar daripada penambahan dengan serat Pinang Merah. Kata Kunci: Polyproplene, serat Bambu, serat Pinang Merah, Komposit, Kekuatan Mekanik. Utilization of scrap plastic to composite, especially made ??????plyproplene (PP) has to be done by adding fibers and sheaths Pinang Red Bamboo. PP matrix is heated in the heater melted then added to each of the natural bamboo fiber and red nut. Mechanical properties of the test results have been compared with the fiber-matrix without the addition of a fibrous matrix. Tests showed that the mechanical properties of kompisit has increased with the addition of natural fibers. Mechanical strength with the addition of bamboo fiber is greater than the addition of the Red Pinang fiber. Keywords : polyproplene, Bamboo fiber, fiber Pinang Merah, Composite, Mechanical Strength.
Analisys of Effect of Outside Air Speed To Air Humidity and Refrigerator Coefficient of Performance Sipahutar, Riman; Irawan, Ferry
Journal of Mechanical Science and Engineering Vol 3, No 1 (2016): Journal of Mechanical Science and Engineering
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Air conditioning is essential for most humans and are associated with human thermal comfort. At conditioned room where the condition can occur outside air (atmosphere) into the room. Althouht the author was interested in researching this influx of outside air. The aims of this research would be able to examine the effect of the entry of outside air to the room air humidity and refrigerator coefficient of performance. The method used is to perform laboratory-scale experiment with conditioned room with air conditioning or no air conditioning which then incorporate outside air into the room. From this experiment would get experimental result, the result of theoretical calculation, and the result of calculation by using the simulator program. By entering the outside air was obtained that the outside air increases the humidity in the room and affect refrigerator coefficient of performance. The experimental results showed that the average maximum condition occurs at a speed of 1 m/s and at 20 minutes. It can be concluded that the outside air entering the room using the air conditioner would improve indoor air humidity and increase the cooling load means affect refrigerator coefficient of performance. And in a room without air conditioner caused indoor air humidity getting closer to the comfort zone.
Dynamic Simulation on Tool in Turning Process Using Depth of Cut Variance Using Harmonic Response System Analysis of Ansys Nugraha, Agung; ., Zulkarnain
Journal of Mechanical Science and Engineering Vol 2, No 2 (2015): Journal of Mechanical Science and Engineering
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High Speed Steel (HSS) is one of the most used material for making lathe tool, because of its ability to work under high rotation and friction condition without losing its mechanical properties significantly. on turning process, careful decision of machining parameters that matched its tool material ability for turning. In Simulation process, machining parameters which will be used in it had been researched by Pramod, Kumar, et al., (2014) with adjustments. machining parameters are feed rate at 0.24 mm/rev, spindle rotation at 1500 rpm, and main cutting angle are orthogonal cutting angle at (90). In this simulation, the writer using depth of cut variance of 1 mm, 1.5 mm, and 2 mm. purposes of using these variacuts are to find frequency and amplitude had ccured on lathe tool with different depth of cut
Analysis of Residual Stress And Strain on The Formation of Workpiece Based Ansys 12.1 Prayogi, Sonny; ., Zulkarnain
Journal of Mechanical Science and Engineering Vol 2, No 2 (2015): Journal of Mechanical Science and Engineering
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Machining process to produce plastic deformation on the workpiece. Plastic deformation during the machining process are formed by friction against the cutting tools to workpieces generate furious. During the deformation process appearance residual stress on the surface which can affect the fatigue resistance, fracture strength, and corrosion. Failure in the component structure is not only due to external forces, residual stress is an important parameter in this case. The purpose of this study to analyze the residual stresses that occur on the workpiece from turning process. In the analysis performed using the Finite Element Method (FEM) with the software to obtain the desired results by entering input data including modeling of cutting tools and the workpiece. The result is a visual overview of the residual stress in the workpiece and areas of plastically deformed as a result of feeding from the cutting tools motion. 2D visual modeling using the software Ansys 12.1 with three comparison rake angle 50, 100.150 to determine the result of the residual stress on the surface of the workpiece.
Design Of Spring Valve Cylinder Head Opening Tools Burlian, Firmansyah
Journal of Mechanical Science and Engineering Vol 3, No 2 (2016): Journal of Mechanical Science and Engineering
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During spring valve release process of the car cylinder head, workshops experiencing difficulties due to the released manually. The release is done by hitting the outside of the valve spring retainer which can cause damage to the valve spring retainer and also may reduce the stiffness the valve spring. It is designed tools for release spring valve on the cylinder head car. In this paper is conducted for the initial phase to design a tool, and then carried out the calculation of the force required to remove the workpiece spring valve. Tools will be made in accordance with the calculations have been done then proceed with testing tools. Once the tool has been tested, the evaluation and study of literature that will be used for the selection of materials. From the data calculation, the force required to depress the valve spring is 1942.4 N and material using the steel SC-42. Mechanism of action of the tool using a lever or a lever in order to facilitate suppression valve springs.

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