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Jurnal Ilmiah Teknik Mesin
Published by Universitas Lampung
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Core Subject : Engineering,
Mechanical Engineering
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Articles 142 Documents
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KARAKTERISASI SIFAT MEKANIK DAN STRUKTUR MIKRO BAJA CARBON RENDAH UNTUK CANE CUTTER BLADE PADA PT GUNUNG MADU PLANTATION Bayu Agung Permana; Mohammad Badaruddin; . Zulhanif
Jurnal Ilmiah Teknik Mesin Vol 1, No 3 (2013)
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Cane 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 KADAR KARBON DALAM BAJA PADA PROSES PELAPISAN ALUMINIUM CELUP PANAS Mohammad Badaruddin; . Alfurkhan
Jurnal Ilmiah Teknik Mesin Vol 2, No 1 (2014)
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Carbon steel is widely used as a component of engineering work in high temperature conditions. During the application decreases of oxidation resistance drastically. A steel coating is very needed to increase an oxidation resistance. One technique is inexpensive and used to be coating for large components are hot dip coating. This experiment  aimed to determine the effect of carbon content in steel AISI 1020, AISI 1045 and AISI 1090 against hot dip  aluminium coating on hot dip aluminium coating process and to study the influence of immersion time in the tub aluminium  molten steel on the growth of intermetallic layer. Immersion times used were 4, 9, and 16 seconds with a temperature of 700 °C. Volume composition used for each solution is 100 ml flux with three variations, namely Y1 flux ( 1.5 g KF, NaF 1.5 g, 8.5 g Borax , and 2.5 g of acetic acid ), Y2 ( 2.0 KF g, 2.0 g NaF, 9.5 g Borax, and 3.0 acetic acid ) and Y3 ( 2.5 g of KF, 2.5 g NaF, 10 g Borax, 3.5 g acetic acid ). Then do the impact test , SEM , OM and XRD. For the most thick aluminium layer was AISI 1020 steel with immersion time of 4 seconds is 0.118 mm and Fe - Al intermetallic layer ( FeAl3+Fe2Al5 ) is the thickest on AISI 1045 steel with immersion time of 9 seconds. Energy values were greatest impact on AISI 1020 steel is 187.2 J, means less carbon content of the energy generated greater impact.Keywords : Hot Dip Aluminium, CarbonSteel, Impact Energy,Fe-Al (FeAl3+Fe2Al5), Flux Variations.
ANALISA PERILAKU MEKANIK KOMPOSITSERAT KAPUK RANDU MENGGUNAKANMATRIK POLYESTER Syamsul Arif Sarifudin; . Tarkono; . Sugiyanto
Jurnal Ilmiah Teknik Mesin Vol 1, No 2 (2013): Jurnal FEMA Vo.1 No.2 Tanggal 10 April 2013
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The background research is the development of science and technology in the field of materials engineering and the demands off indinga new breakthrough in the provision of high quality materials and environmentally friendly. Composite materials of natural fibers that are more light weight, malleable, corrosion resistance, low price andeasy to obtain. This study uses materials such aspolyesterresin, and a catalyst Randu Kapok fiber. Randomly arranged fibers incomposites with various volume fractions of 15%, 25%, 35%. Making way press mold, bending tests were conducted with a reference standard ASTM D790-02, tensile testing standard ASTM D-638. Testing through the process of tensile and bending tests to determine the mechanical properties of the composite. Greatest tension obtained in the composite with 35% volume fractionis equal to 3,8046 MPa while the largest bending strength of the composite obtained from volume fraction 15% at 84MPa. Void formed causing the load can be held by thematrixis reduced due tolack of homogenan specimens.Keywords: Composite, Kapok Fiber, Polyester, Mechanic strength, Tensile Test and dan BendingTest.
ANALISIS THERMAL DAN TEGANGAN PADA PERANCANGAN BEJANA TEKAN (PRESSURE VESSEL) UNTUK LIMBAH KELAPA SAWIT DENGAN KAPASITAS 10.000 TON/BULAN Rahmat Ramadhan; A.Yudi Eka Risano; Ahmad Su'udi
Jurnal Ilmiah Teknik Mesin Vol 1, No 4 (2013)
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Bejana tekan (pressure vessel) adalah tempat penampungan suatu fluida baik berupa cair maupun gas dengan tekanan yang lebih tinggi dari tekanan atmosfir. Aplikasi bejana tekan salah satunya pada tahapan perebusan di pengolahan limbah kelapa sawit untuk memproduksi biodiesel. Pada proses perebusan terjadi pembebanan struktural berupa tekanan dan beban thermal yang tidak merata pada bejana tekan sehingga terjadi pembebanan yang terintegrasi. Bagaimana pun pembebanan yang terintegrasi akan mengakibatkan efek yang berbeda dibanding hanya satu pembebanan saja sehingga penting untuk menganalisis desain dengan mengaplikasikan pembebanan yang terintegrasi. Tujuan penelitian ini adalah untuk menganalisis tegangan maksimum yang diijinkan dan efek beban thermal yang terjadi pada desain bejana tekan. Analisis dilakukan dengan mensimulasikan model dengan pembebanan thermal internal berupa konduksi sebesar 80°C pada sisi shell bagian dalam dan konveksi udara bebas di sisi shell bagian luar dan pembebanan thermal eksternal berupa konduksi sebesar 80°C pada sisi shell bagian dalam dan konveksi udara bebas serta konveksi sebesar 200°C dengan koefisien perpindahan panas sebesar 7,3236 W/m K di sisi shell bagian luar. Kemudian keduanya ditambahkan pembebanan struktural berupa tekanan sebesar 294 kPa dan percepatan gravitasi bumi. Hasil dari penelitian menunjukkan bahwa tegangan maksimum pada geometri model yang terjadi untuk beban thermal internal yaitu sebesar 160,91 MPa dan beban thermal eksternal sebesar 160,56 MPa terletak pada pipa nozzle. Penambahan beban thermal mengakibatkan peningkatan tegangan sebesar 17,87% dibandingkan dengan simulasi beban struktural saja (136,51 MPa). Keywords:Bejana Tekan, Metode Elemen Hingga, Analisis Thermal dan Tegangan
PENGARUH VARIASI NORMALITAS NaOH PADA AKTIVASI BASAFISIK ZEOLIT PELET PEREKAT TERHADAP PRESTASI SEPEDA MOTOR BENSIN 4-LANGKAH Ari Andrew Pane; Herry Wardono; A.Yudi Eka Risano
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
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Natural zeolite is an alternative adsorbent. It needs firstly to  be activated before using it as absorbent in order to get zeolite with high adsorption capacity. Previously, the use of pelletized zeolite activated by NaOH-physic and KOH-physic with varied normalities was only performed in a diesel engine to observe the engine performance.In this study there were two kinds of activation, that is  chemical activation with NaOH activator variation on the normality of 0.25 N, 0.5 N, 0.75 N, and 1.0 N and physical activation with using  a temperature of 220 °C for 2 hours. All are made in the form of adhesive zeolite pellets with a diameter of 10 mm and a thickness of 3 mm.From the test results and analysis showed that the use of chemically activated zeolite can improve the performance of 4-stroke petrol engine when compared without using  zeolite. The best performance in this experiment obtained at the normality of 0,75 N. At road test, the pelletized zeolite can reduce the fuel consumption 23, 15 %, and 16,51 % at stationary test, and increase acceleration by 14,77 %. Keywords: zeolite adsorbent, variation of normality, activator of NaOH
PENGARUH PENAMBAHAN ZAT ADITIF ALAMI PADA BENSIN TERHADAP PRESTASI SEPEDA MOTOR 4-LANGKAH Wahyu Eko Saputra; Harmen Burhanuddin; M.Dyan Susila
Jurnal Ilmiah Teknik Mesin Vol 1, No 1 (2013)
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The quality fuel affects combustion because the fuel quality will get better combustion. Therefore, it is necessary to improve the quality of the fuel to produce combustion. Such an increase in the octane rating of the fuel can result in increased good quality of the fuel. One method used is the addition of natural additives in the fuel. Tests were performed using a motorcycle test engine 100 cc 4-stroke is running test (road test and acceleration), and stationary testing. The test road test conducted by a distance of 10 km with an average speed of 50 km / h test aims to get the value of fuel consumption. Furthermore, using the acceleration test speed 0-80 km / h and 40-80 km / h which aims to get the fastest acceleration time. Then the stationary testing done on rotation 1.000 rpm and 3.000 rpm with a 5-minute aims to get the value of fuel consumption at rest. This test uses a natural variation in the dose of the gasoline additive used is 1:4, 1:6, 1:8, and 1:10. On testing fuel consumption with the distance 10 km can be seen that the concentration of 1:6 is the best concentration that can reduce fuel consumption by 23,31% (136 ml), compared with natural gasoline without additives (177,333 ml). Average time acceleration 0-80 km / h resulted in the concentration of the best natural additives 1:4 that is with an average acceleration of 10,847 seconds (20,69%). In testing acceleration 40-80 km / h obtained for the concentration of 1:8 with an average acceleration of 6,993 seconds (21,83%). Tests of stationary fuel consumption at 1,000 rpm for 5 minutes in to the best performance at a concentration of 1:8 that is 33,91% (12,667 ml) whereas at 3.000 rpm stationary best performance is obtained at a concentration of 1:10 30,71% (14,334 ml).Keywords : fuel, natural additives, engine performance.
PENGARUH PANJANG SERAT TERHADAP KEKUATAN TARIK KOMPOSIT BERPENGUAT SERAT IJUK DENGAN MATRIK EPOXY Efri Mahmuda; Shirley Savetlana; . Sugiyanto
Jurnal Ilmiah Teknik Mesin Vol 1, No 3 (2013)
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Serat ijuk merupakan serat alami yang diperoleh dari pohon aren (Arenga Pinnata Merr), dan dapat terdegradasi secara alami serta harganya lebih murah disbanding serat sintetis. Tujuan dari penelitian ini untuk mengetahui pengaruh panjang serat terhadap kekuatan tarik komposit berpenguat serat ijuk dengan matrik epoxy. Pada penelitian ini, pengekstrakan serat ijuk menggunakan sisir kawat yang berfungsi memisahkan serat ijuk dari pelepahnya lalu dilakukan pemilihan serat berdiameter 3 mm menggunakan micrometer sekrup.kemudian serat ijuk direndam dalam larutan NaOH 5% selama 2 jam dan dikeringkan selama 15 menit.  Serat selanjutnya dipotong dengan panjang 30 mm, 60 mm, dan 90 mm.Lebih lanjut, pembuatan komposit menggunakan metode hand lay up dengan pencampuran resin epoxy dan hardener dengan perbandingan campuran 1:1 mengacu pada ASTM D638. Selanjutnya dilakukan pencampuran matrik dan serat dengan fraksi massa 80% : 20% menggunakan variasi panjang serat.  Selanjutnya specimen uji dipanaskan dalam oven dengan suhu70 C selama 10 menit.  Kemudian dilakukan pengujian tarik untuk resin epoxy murni dan untuk komposit dengan variasi panjang serat 30 mm, 60 mm, dan 90 mm. Fhoto daerah patahan dengan Scanning Electron Microscope (SEM) digunakan untuk melihat mekanisme perpatahan komposit.     Hasil pengujian menunjukkan bahwa kekuatan tarik dan regangan tertinggi dicapai pada komposit dengan panjang serat 90 mm. Kekuatan tarik yang didapat sebesar 36,37 MPa dan regangan sebesar9,34 %.  Faktor-faktor yang mempengaruhi kekuatan komposit ialah daya ikat serat dengan matrik, pendistribusian serat yang merata, dan panjang kritis serat.  Hasil foto SEM pada patahan komposit serat ijuk menunjukkan terjadinya fiber breaking. Hal ini menunjukan bahwa daya ikat antara matrik dan serat yang cukup baik, tetapi sebaran serat pada matrik tidak merata yang mengakibatkan kekuatan tarik komposit yang optimal tidak bisa dicapai.Keywords : Serat ijuk, kekuatan tarik, SEM
PENGARUH KOMPOSISI DEPOSIT NaCl/Na 2 SO TERHADAP KOROSI TEMPERATUR TINGGI BAJA AISI 4130 YANG DILAPISI ALUMINIUM 4 Yudhistyra Saputra; Mohammad Badaruddin; . Zulhanif
Jurnal Ilmiah Teknik Mesin Vol 2, No 1 (2014)
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Steel AISI 4130 is a combination steelof 1,0 Cr-0,25 Mo-Fe that mostly used for the component heat axchanger and pipe steam   boiler. However in a high temperature and contain of corrosive gas like klor and sulfur,the endurance of the corrosion of steel AISI 4130 declines. It is important to do a research for increasing the endurance of the corrosion of the steel AISI 4130 with heated Al layered in the surface of steel AISI 4130 Al layered and oxidized in temperature 750°C during periods 1-49 jam. The calibration of the corrosion is done with the variation of deposit NaCl/Na The finding of the research shows that the existence of deposit NaCl/Na2 SO in the steel Al layered brings a large influence oxidation kinetics steel, it is proven through the largest value of parabolic constants of the steel AISI 4130 with Al layered with the comparison of deposit  NaCl/Na4(gr):30/70 is 6,89 × 10-9 g2 cm–4 s–1. Whereas the value of parabolic constants with the comparison of deposit (gr): 100/0 is 2,71 × 10 -9 g2 cm–4 s–1, 50/50 is 6,15 × 10 -9  g2 cm–4 s–12 SO24SO4 , 70/30 is 2,97 × 10 g2 cm –4 s–1 and 0/100 is around 2,60 × 10 -9  g 2 cm –4s–1. The destruction of the protective layer Al in the aluminide layer is caused by the existence of klor dan sulfur from the deposit NaCl/Na2SO4 thattriggersthe growthofiron-rich ovide (FeO).Keywords : steel AISI 4130, Al hot-dip, deposit NaCl, deposit Na2SO4 , Al2O3, iron oxide.
Cover Jurnal FEMA Vol.1 No.4 Oktober Tahun 2013 Cover Halaman Sampul
Jurnal Ilmiah Teknik Mesin Vol 1, No 4 (2013)
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Ini adalah sampul jurnal FEMA Vol.1 No.4 Tahun 2013
UNJUK KERJA VORTEX TUBE COOLER PADA PEMESINAN BAJA ST41 Akhmad Isnain Pulungan; Gusri Akhyar Ibrahim; Yanuar Burhanuddin
Jurnal Ilmiah Teknik Mesin Vol 1, No 4 (2013)
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Proses pemesinan merupakan proses manufaktur dimana objek dibentuk dengan cara membuang atau menghilangkan sebagian material dari benda kerjanya. Pada proses pembubutan, panas yang dihasilkan sangat tinggi sebagai akibat dari gesekan antara pahat bubut dan benda kerja. Salah satu faktor berpengaruh pada dalam proses pembubutan adalah media pendingin. Dalam penelitian ini pembubutan dilakukan menggunakan pahat HSS dan material uji baja ST41, dengan media pendingin system vortex tube (udara dingin bertekanan) menghasilkan suhu udara dingin 14,6 C, 18,5 C, 21, C. Udara dingin luaran vortex tube digunakan selama proses pembubutan dengan parameter feeding (f) 0,1 mm/rev, kecepatan spindel adalah 625(rpm) dan kedalaman potong konstan 2 mm. Hasil penelitian pendingin vortex tube bukaan 2 dengan gerak makan 0,11 mm/rev dan kecepatan potong 80,46 m/menit menghasilkan umur pahat mencapai 5,63 menit, pada bukaan 3 dengan kecepatan potong 72,61 m/menit dan gerak makan 0,11 mm/rev umur pahat mencapai 5,60 menit. Umur pahat terendah di dapat tanpa menggunakan pendingin dengan gerak makan 0,11 mm/rev, kecepatan potong 88,39 m/menit, yaitu mencapai 2,86 menit dan umur pahat tertinggi didapat menggunakan media pendingin vortex tube bukaan 1 dengan gerak potong 0,11 m/rev dan kecepatan potong 88,39m/min sebesar 6,29 menit. Oleh karena itu media pendingin vortex tube dapat meningkatkan umur pahat HSS hingga mencapai 52,76%.Kata Kunci: Pembubutan, baja ST41, HSS, vortex tube, kecepatan potong, gerak makan, umur pahat

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