Jurnal Ilmiah Teknik Mesin
Not a member yet
88 research outputs found
Sort by
KARAKTERISASI SIFAT MEKANIK DAN STRUKTUR MIKRO BAJA CARBON RENDAH UNTUK CANE CUTTER BLADE PADA PT GUNUNG MADU PLANTATION
Full text linkCane cutter blade (blade chopper cane), which is a tool used for chopping cane. This tool acts as a cane crusher, made of low steel carbon. Constraints that occur on Cane Cutter Blade is a high wear rate, thus disrupting the productivity of the industry. The company handles this problem by providing a coating on a cane cutter blade, only in this way is still considered very less effective at. low steel carbon relatively low carbon steel.Characterization of the mechanical properties and the microstructure of low steel carbon with hardness testing and tensile testing, while the micro picture of choice to see the results of the condition of the microstructure after a heat treatment with water as cooling media.Keywords: microstructure, cane cutter blade, low steel carbol, tensile testing, hardness testing, heat treatment
Pengaruh Penggunaan Tabung Induksi Terhadap Konsumsi Bahan Bakar Sepeda Motor Bensin 4 Langkah
Full text linkYEIS 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
PERILAKU CREEP PADA KOMPOSIT POLYESTER DENGAN SERAT KULIT BAMBU APUS (GIGANTOCHLOA APUS (J.A & J. H. SCHULTES) KURZ)
Full text linkBamboo is used as raw material wicker and crafts are emerging as a new solution for use as new materials that are more environmentally friendly and have better mechanical strength. Research by utilizing bamboo as reinforcement fibers and polyester resin matrix aims to determine the mechanical strength of the resulting composite merging the two. Bamboo fiber composites made with various volume fractions of 10%, 15% and 20% using polyester resin and catalyst MEKPO ratio 100:1. The composite is prepared by hand lay-up by using a glass as a mold. Bamboo fibers used as reinforcement composites, is expected to increase the tensile strength and creep strength of each variation. In addition to observing the microstructure using SEM (Scanning Electron Microscope) to determine the failure mechanisms that occur on the fracture surface.From this study the authors concluded that bamboo fiber composites have the potential for further development because the tensile test results are directly proportional to the addition of fiber to the highest tensile strength was 86.01 MPa at 20% volume fraction, whereas the average creep testing best time of 529.63 seconds on 10% volume fraction, the failure mechanism of the plates shown in SEM is a form of fiber breaking, pull out and de bonding.Keywords: Bamboo, composite, creep
POTENSI PRODUKSI MINYAK ATSIRI DARI LIMBAH KULIT KAYU MANIS PASCA PANEN
Full text linkKayu manis (Cinnamomum burmanii BL) is known and cultivated for its aromatic content. In the previous experiment the powder of kayu manis leather can be extracted to be atsiri oil. And the rubbish like; leaf, scrap, the powder from cutting tree, trank are the parts of wood leather that haven’t been used yet, so it will be appear as a problem for the environment. If the rubbish are extacted by steam and water destilation it will produce atsiri oil with good quality and good cost, as a mix ingredient of medicine beverages, food, and parfume. The experiment goal is to filter by using arrange destilation tool to get output the process is an optimal rendeman atsiri oil. An the extract metode used is steam and water destilation. To get a good filter output should be treated by parameter variety suitable with test tool performance they are; pressure variety (1 atm; 1,65 atm; 1.85 atm), temperatur (99oC; 114oC; 119oC) and resident time (1 hour; 2 hour; 3hour). The result of the testing is an output of the most atsiri oil, it is at pressure 1,85atm, the ingredient weigh is 750 gram, and the resident time 3 hour. Where, the maximum percentage rendeman from the leaf, powder, and scrap until 1,63 %; 1,49%; and 1,42%. Atsiri oil has not reached optimum point, because the pressure has not been optimal and the capacity of the tank is limited. The percentage rendeman up to 1% can give chance for the rubbish of kayu manis to be processed become atsiri oil. So that, this research can be continue by project for study of home industry.Keywords : Destilation process, atsiri oil, kayu manis, the rubbish of kayu manis leather
PENGARUH UKURAN FLY ASH PADA KEKUATAN BENDING KOMPOSIT RESIN EPOXY
Full text linkFly 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 strengt
Perancangan, Pembuatan, dan Pengujian Pembangkit Listrik Energi Biomassa
Full text linkThis paper describe about designing and testing laboratory-scalebiomass energy power plant, toprovideelectricityin remote areasand islandswhich utilizerenewable energyin accordancewith thepresident decreeNo.5/2006. The power plantis built with gasificationreactorwhich designedbased onImbertdowndraftgasifier, integrated gas cleaned up system (IGCS) include cyclones, venturiscrubbersrectangulartype, and a new gas cleaner which called rotaryseparator. Experiments carried out withthe parametersof gasificationsystemsAFR0.48,0.5, 0.54,scrubbingwater flow 1.26, 2.62, 3.33l/min, rotaryseparator suction speed about 0.9,3.4,4.4 m/s. Each of parameters was interacted to producecleanproducer gas which free from tarandimpurities, as wellas ahigh calorificvalue as fuelgasgenerator. The result of experiment and literature review shows thatthecurrentgasificationAFR about 0.54still far enough from ideal rice husk gasification AFRabout 1.5. Eventhough, the remaining taris stillrelativelyhigh at3788.1mg/m3. AfterIGCSinstalled,the tarcan be significantly reducedto210.45mg/m3, with thescrubbingwater flow3.33l/min, and4.4 m/s suction speed of rotaryseparator. In addition, theelectric powergeneratedis stillbelow 100W,so installationshouldbe modifiedagain, especially in thesector ofair supply tothe reactor.Keywords : electricity crisis, biomass gasification, biomass energy power plant
Cover Jurnal FEMA Vol.1 No.4 Oktober Tahun 2013
No full textIni adalah sampul jurnal FEMA Vol.1 No.4 Tahun 201