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Pengaruh Variasi Ukuran Partikel Marmer Statuari Terhadap Sifat Mekanik Komposit Partikel Marmer Statuari I Gede Mahayatra; Harnowo Supriadi; Shirley Savetlana
Jurnal Ilmiah Teknik Mesin Vol 1, No 4 (2013)
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Abstract Manufacture a composite material with a matrix resin epoxy and marble statuary powder as filler is one industry-utilization of waste. Mechanical properties of the composite material is influenced by the particle size of the particles. variations in particle size would form different mechanical properties. This research was conducted to investigate the effect variations in particle size on the mechanical properties of the composite particles. In this research variation in particle size marble statuary used is 60 mesh, 100 mesh, 140 mesh and 200 mesh. Resin used is epoxy resin, and composition of the volume ratio between the matrix and the particles used in research was 80%: 20%. The method is used in the manufacture of composite hand lay-up method. Tests performed in this research is XRD testing on solid marble, bending strength, hardness, and SEM. XRD results obtained from the testing phase identified in the marble statuary are Ca2O5Si , CaCO3, CaO, SiO2 , MgO , MgCO3 , and SiC. Hardness value of composite particles of marble is 22.3 to 48.33 HB, and flexural strength values of composite particles of marble statuary is from 13.89 to 38.89 N/mm . Particle size is good for filler in the composite is 140 mesh particles. Marble composite particles 140 mesh particle size has a flexural strength and hardness highest, because SEM photograph composite of 140 mesh particle distribution in the matrix evenly, and there is a good bond between the matrix and particles of marble statuary. Keywords: Marble statuary, composite, particle size marble, epoxy , the mechanical properties

KAJIAN EKSPERIMENTAL PENGARUH PANJANG CHORD SUDU TERHADAP UNJUK KERJA TURBIN HELIK UNTUK SISTEM PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) Ahmad Rapa'i; Jorfri B Sinaga; M.Dyan Susila
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
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All this time microhydro power plants (MHP) created a resource use of water flow has high fall of water (head) while for areas that have stream of river but do not have high fall of water (head) still a lot of untapped but has potential hydrokinetic be able rotating turbine. This is what lies behind the research conducted to determine the effect of chord length on the performance of the helical turbine which is expected to come helical turbine performance as the optimum use of the potential hydrokinetic. Helical turbine tested had dimensions of 1.2 m high and 1 m in diameter, blade profile NACA 0030, chord length 15 cm, 20 cm and 25 cm with number of blades 3 pieces. Tests performed on the irrigation canals that open to varying water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s. From the test results obtained helical turbine performance as follows. The largest torque obtained in water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s is 3.89 Nm, 27.09 Nm and 39.38 Nm is the chord length of the turbine with 25cm and the smallest torque on the chord length of 15 cm of 2.31 Nm. Power largest turbine in the water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s is 7.12 Watt, 60.41Watt and 103.96 Watt, turbine that is on the chord length of 25 cm and the smallest turbine power chord length of 15 cm by 3.58 watts. Largest turbine efficiency at water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s is 8.44%, 32.02% and 33.84% in the turbine with a chord length of 25 cm and efficiency the smallest turbines on the chord length of 15 cm of 1,17%. Keywords : microhydro, water turbine, helical turbine, chord length, helical turbine performance

Pengaruh Penambahan Abu Sekam Padi Terhadap Kekuatan Tekan Dan Porositas Genteng Tanah Liat Kabupaten Pringsewu Mei Indra Kusuma; . Tarkono; Moh. Badaruddin
Jurnal Ilmiah Teknik Mesin Vol 1, No 1 (2013)
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Rice’ husk ash’ prosperous in silica (siO2). Silica in construction term, especially concrete technology had already been used as additional ingredient. Husk ash is used as additional ingredient of clay roof tile making process. It is made by compounding of clay, sand, water andhusk ash. Then, they are mashed by extruder machine and forming of kuweh and then, airing for three days before the process of stamping. The roof tile is dried for four days then there is fumigation for twelve days and continued by combustion for also twelve days. The examination which used is press and porosity examination with the aim of knowing whether there is additional impact of rice’ husk ash’ existence or not into clay roof tile in Kabupaten Pringsewu. Theresearch’s results showed that there is conversion of press and porosity power compared with roof tile without rice’s husk ash composition. The optimum value for the press and porosity examination is obtained from the roof tile with 5% rice’s husk ash’ composition with the press power’s average value 11.118 KPa and the porosity average value 20.16%. The minimum value for the press and porosity power is obtained from the roof tile without rice’s husk ash’s composition with the press power’s average value 8.393 KPa and its porosity average value 21.92%.Keywords: clay roof tile, rice husk ash, silica (SiO2), press power, porosity.

Pengaruh Penggunaan Tabung Induksi Terhadap Konsumsi Bahan Bakar Sepeda Motor Bensin 4 Langkah Junaidi Supratman; Herry Wardono; M.Dyan Susila
Jurnal Ilmiah Teknik Mesin Vol 1, No 3 (2013)
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YEIS tube (Yamaha Energy Induction System) has been able to enhance the performance of the motorcycle. Therefore, the use of induction tube on a 4-stroke motorcycle is expected to be able to increase the volumetric efficiency of the suction stroke, so that the power (acceleration) of the engine can increase at low speed. Tests of using induction tubein a 4-stroke motorcycle is required to observe the effect of the induction tube position on its performance and emission.the engine performance tests were carried out in road tests at an average speed of 40 kph. It was conducted before and after using the induction tube, and the induction tube mountings on intake manifold were varied at positions of JS150 (15 mm from intake manifold), JS 375 (37,5 mm), and JS600 (600 mm). Each type of test was performed 3 times to get it’s average.From the results, it was found that the fuel consumption of the motorcycle could maximally reduce by 27.8% in mounting JS150 and the lowest engine consumption by 0.98% in mounting the intake manifold JS 600. The best result occurred in mounting of JS150 for all tests. JS150 is the optimal position. This due to JS150 is the closest position from intake manifold and the most farthest position from carburettor. Therefore, at mounting of JS150, residual air and fuel mixture can be fully drawn into both the line and tube of the induction tube. In contrast,JS600 is the farthest position from intake manifold, so that the residual air and fuel mixture cannot fully be drawn into the line and tube of the induction tube, the mixture is partially drawn into carburettor and induction tube, as in branched pipe system.Keywords : induction tube, petrol engine performance, YEIS.

PENGARUH PUTARAN DAN KECEPATAN TOOL TERHADAP SIFAT MEKANIK PADA PENGELASAN FRICTION STIR WELDING ALUMINIUM 5052 Muhammad Iqbal; . Tarkono; Gusri Akhyar Ibrahim
Jurnal Ilmiah Teknik Mesin Vol 2, No 1 (2014)
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Aluminium is a metal that has a good resistance against corrosion, this is because the occurrence of the phenomenon of pasivasi. In addition to its resistance to corrosion, aluminium also has a lighter weight compared to steel, so aluminium is frequently used as one of the materials used in the manufacture of ships, especially on the upper deck of the building, insulation, fuel tanks and freshwater tank.Welding is the process of connecting between two or more metal parts by using thermal energy.In general aluminum welding using fusion welding processes such as Metal Inert Gas and Metal Inert Gas, but on both of these methods there is possibility formation of defects are porosity, cracks and prone to occurringdeformationduringcooling processof dan the formation ofmetalwelding. The purpose of this study was to determine the effect of tool rotation and welding speed on the mechanical aspect of Aluminium 5052 with the friction stir welding method.The parameters of the welding process is done on the research this is is the round tool and welding spee is is the round tool and welding speed.Round tool used there are two namely 1800 rpm and 1100 rpm. The speed of welding is also used there are two variations,namely 11.4 mm/min and 19.8 mm/min. As for the mechanical tests conducted there are three, namely testing the hardness, impact test, and tensile testing.The result of this research was the discovery that the round tool and welding speed greatly affect the mechanical properties of aluminium that has been welded. Because the tool is rotating faster increases the tensile strength of aluminium, while the small welding speed will increase the hardness of aluminum that has been welded. Keywords : aluminium, welding, friction stir welding, mechanical aspect of metals

Cover Jurnal FEMA Vol.1 No.3 Juli Tahun 2013 Cover Halaman Sampul
Jurnal Ilmiah Teknik Mesin Vol 1, No 3 (2013)
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Jurnal Fema Vol.1 No.3 terbit pada bulan Juli 2013, terdiri dari 92 halaman, dengan 10 artikel ilmiah.

PENGARUH UKURAN FLY ASH PADA KEKUATAN BENDING KOMPOSIT RESIN EPOXY Yusman Zamzami; Shirley Savetlana; Gusri Akhyar Ibrahim
Jurnal Ilmiah Teknik Mesin Vol 1, No 4 (2013)
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Fly ash is one of the solid waste generated by industries that use coal as a fuel for the production process. Fly ash contains silica or alumina silica that has no adhesive properties (cementation) to himself. The purpose of this research was to determine the bending strength of composites reinforced fly ash (coal waste) through the bending test. In this study, fly ash was sieved with a sieve to obtain a variation of fly ash particle size of 40 mesh, 80 mesh and 120 mesh. Composite manufacturing using hand lay up with a mixture ratio of epoxy resin and hardener 1:1. Next step is mixing matrix and fly ash with mass fraction 60%: 40% use of fly ash particle size variation. Transform and then testing bending and for pure epoxy resin composites with various particle sizes. Photo fracture area with Scanning Electron Microscope (SEM) was used to analyze the causes of failure in composites. In this study the mechanical properties of the composite bending test in accordance with ASTM D790. The test results showed that the bending strength of the composite teringgi achieved with fly ash particle size of 120 mesh, the bending strength of 59.26 N/mm2 obtained. Factors that affect the bending strength is power tie fly ash particles with the matrix, the distribution and number of particles are evenly distributed in the composite particles. SEM image results in the fracture of composite particles of fly ash shows the tie between the matrix and the particles are quite good. Keywords: Fly ash, composite, bending strength

PERENCANAAN PENYEDIAAN ENERGI DI WILAYAH LAMPUNG MENGGUNAKAN PERANGKAT LUNAK LONG-RANGE ENERGY ALTERNATIVES PLANING SYSTEM (LEAP) Budi Waluyo; Harmen Burhanuddin; . Martinus
Jurnal Ilmiah Teknik Mesin Vol 1, No 2 (2013): Jurnal FEMA Vo.1 No.2 Tanggal 10 April 2013
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Lampung province is a region with a strategic location as a gateway entrance and exit of the economy from the island of Java to Andalas or vice versa. Beside of that the potential of vast natural resources enough to serve as the foundation and development capital, including potential energy resources. Energy needs from year to year increased significantly. if fixed transport link between the islands of Java and Sumatra realized as expected energy demand will jump dramatically. Currently, most of the energy supply in Lampung are supplied from other areas such as Java, and other provinces in Sumatra. Therefore, it is necessary to forecast energy supply for several years to get the proper planning of energy supply to meet the energy needs at times to come. In this research study about projected energy supply in the region of Lampung using software LEAP (Long-range Energy Alternative Planning system) version 2008. The study is based on projections of existing energy needs and based on data from existing energy potential in the province of Lampung, such as coal, geothermal, biogas cow dung and buffalo, palm oil biodiesel and bioethanol sugar cane, sweet potatoes and cassava. The results showed that the supply of electricity from 2014 to 2030 was in excess of the electrical energy needs in the area of Lampung because of the operation of geothermal power plants. For biogas sector, projected at the beginning of the year to replace the LPG gas by 12% and at the end of the projection to 8% due to growth in cattle farm and buffalo are very small. For biodiesel sector, provision was 64% at the beginning of the projection, but declined at the end of the projection to 30% due to the growth of oil palm area is very low. In bioethanol sector, from the beginning to the end of the projection is only able to help reduce gasoline consumption by 4%, due to bioethanol are just a mixture so they are less significant. It can be concluded that the new renewable energy which featured in Lampung province are geothermal energy, biogas manure and corn cob gasification.Keywords: energy projection, LEAP model, transformation of energy, renewable energy.

Pengaruh Gerak Makan Dan Kecepatan Putaran Terhadap Aus Pahat HSS Pada Pengeboran Baja ASTM A1011 Menggunakan Pelumas Minyak Goreng Dodi Wibowo; Gusri Akhyar Ibrahim; Arinal Hamni
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
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Pahat HSS yang digunakan dalam proses pengeboran memiliki umur dan tidak dapat digunakan secara terus menerus. Banyak faktor yang mempengaruhi umur pahat diataranya keausan pahat. Untuk menentukan keausan pahat pahat bor biasanya operator mesin hanya melakukan secara visual atau meraba pada bagian ujung mata pahat. Cara ini yang sering dilakukan pada dunia industri dikarenakan keterbatasan alat dan efisiensi waktu dalam proses produksi. Dalam penelitian ini pengaruh kecepatan putaran (n), gerak makan (f) terhadap terbentuknya keausan tepi pahat HSS, dianalisis dengan dua metode, yaitu metode kualitatif (grafik) dan metode kuantitatif (statis) dengan metode analisis variasi (ANOVA). Dalam penelitian ini, proses pengeboran menggunakan pahat HSS dan material uji baja ASTM A1011 dengan ketebalan material 10 mm. Dalam proses pengujian, gerak makan (f) yang digunakan adalah 0,1 mm/rev, 0,18 mm/rev,0,24 mm/rev sedangkan kecepatan putaran (n) yang digunakan adalah 443 rpm, 635 rpm, 970 rpm. Dari hasil pengujian secara kualitatif didapat bahwa peningkatan gerak makan (f) akan meningkatkan keausan tepi pahat HSS. Begitu pula peningkatan nilai kecepatan putaran (n) akan meningkatkan keauasan tepi pahat HSS. Dari metode ANOVA ( pengujian kuantitatif) dengan menggunakan program diperoleh hasil bahwa kecepatan putaran (n), dan gerak makan (f) secara bersama-sama mempunyai pengaruh timbulnya keausan pahat, namun secara signifikan hanya gerak makan yang berpengaruh terhadap timbulnya keausan tepi pahat HSS. Pada penelitian ini gerak makan (f) mempunyai pengaruh paling besar terhadap timbulnya keausan tepi yaitu 50,01% sedangkan kecepatan putaran hanya berpengaruh sebesar 37,42% terhadap timbulnya keausan tepi pahat HSS. Kata Kunci : kecepatan putaran (n), gerak makan (f), keausan pahat, baja ASTM A1011,ANNOVA

STUDY OF MICRO HYDRO ELEKTRICAL POWER PLANT at WAY NGISON RIVER TRIHARJO KEBAGUSAN VILAGE GEDONG TATAAN SECTOR DISTRICT OF PESAWARAN Subekti Bagus W; Agus Sugiri; A.Yudi Eka Risano
Jurnal Ilmiah Teknik Mesin Vol 1, No 1 (2013)
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Electricity become one of the basic needs of industrial and human life. It is shown by the electrical peripherals and industrial machineries which consumes a lot of energy. By the increasing of human population and the electricity consumtion turbine is the most common that used to produce electricity using the renewable energy resources such as hydro, wind, sea wave which it can solve the problem of increasing electricity consumtion. renewable energy sources. This source is readily used from many creeks and rivers that has a high enough flow and water debt which easily found surround us. The purpose of this with title “Feasibility Study Micro Hydroelectric Power Station (PLTMH) Using Cross fllow Turbine at Triharjo desa Kebagusan Kecamatan Pesawaran Bandar Lampung” is to contributed in hydro turbine management and to planning a micro hydroelectric power station that can be used and applied for a better life. Based on the field data, (Head = 12 m and water debit = 0,0584m3/s) the Cross Fllow Turbine can produce energy 5,10 kW. Bellow to the data above it is result that the Way ngison Dusun triharjo Desa Kebagusan dam can be set a micro hydro electric power.Keywords : micro hydroelectric power station, water dept, crossflow Turbine.

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Kota bandar lampung,

Lampung

INDONESIA