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Journal of Mechanical Science and Engineering
Published by Universitas Sriwijaya
ISSN : -     EISSN : 23549467     DOI : -
Core Subject : Engineering,
Mechanical 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 40 Documents
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Darrieus Water Turbine Performance Configuration of Blade Kaprawi Sahim; Dyos Santoso; Jaini Jaini
Journal of Mechanical Science and Engineering Vol 2, No 1 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Horizontal axis Darrieus water turbines, very suitable for use in river flows in the utilization of the kinetic energy. Water turbines studied in this test, is a six-blade Darrieus water turbines. Tests using three configuration of blade arrangements, with conditions rotor sink and drown half. Tests carried out in the watershed Ogan at the village Tabuan Ogan Komering Ulu of South Sumatra Histories. Research results obtained on each configuration of blade, the condition of the rotor and the rotor sink half drowned. High efficiency configuration occurs in parallel arrangement with the condition of the rotor blade sank half.
Tool Life Analysis Of The Car Leaf Spring Fusito HY
Journal of Mechanical Science and Engineering Vol 3, No 2 (2016): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Car leaf spring NISSAN CK12 included in the class of spring steel. The main properties of the steel spring are the elastic modulus and elastic limit. This study aimed to analyze the age and tool wear made from the leaf spring NISSAN CK12 and the HSS. This study uses a conventional lathe tool and Electronic Microscope to take a micro image of the eyes of the tool. The average value of hardness is highest in lathe tool from the leaf spring NISSAN CK12 which treated by Quenching 800ºC holding time of 60 minutes (heat treatment) hardness value by an average of 638.082 HV and from HSS lathe tool amounted to 623.723 HV. From the results obtained on the lathe Tool HSS during the cutting speed Vc = 66.7 m / min VB = 0.3017 tc = 7.17 min f = 0.3 mm / put, Non Treatment tool during the cutting speed Vc = 66 , 7 m / min, a = 0.7 mm VB = 0.3061 with tc = 6.77 minutes. Heat Treatment tool on cutting speed Vc = 66.7 m / min f = 0.3 m / put a = 0.7 mm VB = 0.3051 tc = 6.77 minutes. From the test results it can be concluded that the cutting speed (Vc) 66.7 m / min with a depth of 0.7 mm eating the entire tool wear results can be seen in cutting speed (Vc) 66.7 m / min with a depth of 0.7 mm that the tool of the leaf spring car given the heat treatment has a longer lifespan tools age compared with the leaf spring car Non Treatment. While the HSS has age and the wear rate which is higher than the second tool of the leaf spring car. As seen in HSS tool, the tool age is 1,41 min, Heat treatment tool 1,45 min, non heat treatment tool 1,46 min.
Analysis Of A Compared Temperature Using Capillary Tube Different Measurement Length At Room 3 X 4 M2 Helping AC Portable Rendy Wiseta; Riman Sipahutar; Muhammad Faizal
Journal of Mechanical Science and Engineering Vol 2, No 2 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

At this time along with the times a lot of problems that occur in this world like the Earth's warming temperatures globally . Human needs of the air conditioning apparatus has become a staple in our daily lives . There is also a saying that the Air Conditioner ( AC ) has become a mandatory item installed in homes without air conditioning because of the environment around the home became more sultry and hot when we were in the neighborhood . In developments at this time have many types of AC marketed like Split AC , AC Windows , Central air conditioning and so on . A capillary tube expansion device or lowering pressure so cheap that researchers sought to examine the ratio of capillary -sized 33 , 54 , and 76 cm to the temperature of an air conditioner Portable. Results comparative study of the capillary tube length obtained the lowest total heat value is 9086 , 6925 Btu / Hr and the highest is 15144.4875 Btu / Hr .
Effect of The Pressure of the Squeeze Process on the Hardness and Micro Structure of Recycled Aluminum Materials Nukman Nukman; Muhammad Yanis; taufik kurrahman
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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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.
Analysis Of Corrosion Rate For Steel Concrete Reinforcing Pda Reinforced Concrete In Sea Water Media Helmy Alian
Journal of Mechanical Science and Engineering Vol 4, No 1 (2017): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

  There is so many buildings that built in corrosive environment, which is because lack of terrain or the functions of the buildings themselves. Many of the buildings use steel as reinforcement to strengthen the construction. The strength of buildings will Decrease if the reinforcing steel is corroded because the steel is very easily corroded. This research is to analyze kind of corrosion, corrosion rate of the steel frame in sea water or salty water. Plain reinforcing steel is used in this research with three different brands as specimens to compare the corrosion rate in sea water medium. Observation results show that the kind of corrosion that occurs in three different kinds of the steel is uniform corrosion. Calculation of corrosion rate in this research shows weight loss method. Calculation result of corrosion rate show that A steel brand has the highest endurance Compared to B and C brand. Difference of corrosion rate is because of chemical composition, Also in each kind of steel is added many elements such as chrome, manganese, copper and nickel to increase of corrosion endurance. Difference of elements that added in steel is Affect the corrosion endurance. Base on the research result can be concluded that corrosion endurance in every brand of stainless still in excellent category because the value of corrosion rate is between 0.02 to 0.01 mm / yr
Analisys of Effect of Outside Air Speed To Air Humidity and Refrigerator Coefficient of Performance Riman Sipahutar; Ferry Irawan
Journal of Mechanical Science and Engineering Vol 3, No 1 (2016): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

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.
Effect of Cooling Water Fraction Of Salt in Low Carbon Steel Properties Ahmadin Ahmadin; Diah kusuma pratiwi
Journal of Mechanical Science and Engineering Vol 2, No 1 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Low carbon steel plate is widely used in the field of construction that require high hardness and ductility . One method used to increase the hardness of the low carbon steel plate that is by quenching water plus salt . The results showed that the quenching is based on a study of 10% salt water has a hardness of 168 VHN with σu = 33.62 , ε = 12 % and the lowest is 15 % salt water quenching VHN 101 σu = 30.30 and ε = 7.30% composition of the study above was 10 % salt solution in the cooling water will cause a decrease in mechanical properties .
Shape And Long Pipe Spiral Effect For The Temperature And Efficiency In Mini Boiler Ismail Thamrin JMSE
Journal of Mechanical Science and Engineering Vol 3, No 2 (2016): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

The researchers conducted a study on the modification of the pipe in the boiler mini spiral pipe shape with a length of 196.8 cm pipe. By purpose to increase efficiency and temperature that would be generated by a mini boiler and also to determine the shape and length of pipe that is better for use in mini boiler. Results of the testing showed that the temperature rise had passed through the pipe superheater, on the model of spiral pipe an increase in temperature of 10,92 ° C with a steam temperature of 277,62 ° C, while the temperature of incoming steam coming out of the pipe superheater at 288.54 ° C. Researchers previously known to occur at temperatures of 16,6 ° C rise in temperature of incoming steam superheater piping temperature of 267,4 ° C and 284 ° C steam out. Testing for heating water in the boiler mini was conducted for 90 minutes. Spiral pipe temperature value is better than the previous penilitian pipe and the efficiency in the can on mini boiler which uses the spiral pipe is equal to 14,957%, while in the previous study only 5,63%.
Dynamic Simulation on Tool in Turning Process Using Depth of Cut Variance Using Harmonic Response System Analysis of Ansys Agung Nugraha; Zulkarnain .
Journal of Mechanical Science and Engineering Vol 2, No 2 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

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
New Performance with Matrix Composites of Used Plastic, Fiber of Red Pinang Sheath and Bamboo Nukman Nukman; qomarul hadi; Fusito Fusito
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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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.

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