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All Journal Jurnal Energi Dan Manufaktur Jurnal Ilmiah Teknik Mesin Poros
Sofyan Djamil
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Energy Industrial & Manufacturing Engineering Mechanical Engineering

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Kekuatan Tarik Komposit Matrik Polimer Berpenguat Serat Alam Bambu Gigantochloa Apus Jenis Anyaman Diamond Braid dan Plain Weave Sofyan Djamil; Sobron Y Lubis; Hartono Hartono
Jurnal Energi Dan Manufaktur Vol 7 No 1 (2014): April 2014
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (427.437 KB)

Abstract

Abstrak : Komposit merupakan suatu struktur material yang terdiri dari dua atau lebih konstituen yangdikombinasikan secara makroskopi, kombinasi tersebut tidak saling melarutkan. Matrikmenggunakan polymer dan reinforcement berupa fiber bahan alam bambu jenis gigantochloaapus dipotong berbentuk serat. Metode penelitian diawali dengan pembuatan cetakan(molding) dengan ukuran 500 x 500 x 20 mm, pemotongan bambu sebagai reinforcementberbentuk serat dengan ketebalan 1,5 mm, pembuatan anyaman tipe diamond braid dan plainweave, proses manufaktur bahan komposit dengan metode hand lay-up, ketebalan bahankomposit 4 mm, pembuatan spesimen dengan standar ASTM D3039 dengan sudut orientasi 0o,45o, 90o. Selanjutnya dilakukan proses pengujian tarik untuk mendapatkan nilai kekuatan tarikmaksimum (ultimate tensile strength). Nilai kekuatan tarik maksimum untuk spesimen diamondbraid sudut orientasi 0?: 1,963 N/mm2, 45?: 2,387 N/mm2 dan 90?: 2,253 N/mm2. Nilaikekuatan tarik maksimum untuk spesimen plain weave sudut orientasi 0?: 4,2 N/mm2, 45?:2,017 N/mm2 dan 90?: 4,2 N/mm2.Kata kunci: gigantochloa apus, diamond braid, plain weave, hand lay-up, ultimate tensilestreng.Abstract : Composite is a structure consisting of two or more constituents which combinedmacroscopically. The combination is not mutually dissolve. Using a polymer as a matrix andfiber reinforcement material in the form of natural bamboo Gigantochloa apus of fiber-shapedcut. The research method begins with making the mold with a size of 500 x 500 x 20 mm.Cutting-shaped bamboo as reinforcement fibers with a thickness of 1.5 mm, the manufacture ofwoven braid-type diamond and plain weave, the manufacturing process of composite materialsby hand lay-up method, the thickness of 4 mm of composite materials, the manufacture of thespecimen with ASTM D3039 at an angle variation of 0° orientation, 45o, 90o. Tensile testingprocess is then performed to obtain the maximum value of the tensile strength (ultimate tensilestrength). The maximum tensile strength values for diamond braid specimen : 2.253 N?: 2,387 N/ mm2 and 90?: 1.963 N / mm2, 45?orientation angle 0 / mm2. The maximum tensile strengthvalues for plain weave specimen orientation : 4.2 N / mm2.?: 2,017 N / mm2 and 90?: 4.2 N /mm2, 45?angle 0Keywords : gigantochloa apus, diamond braid, plain weave, hand lay-up, ultimate tensilestrength
PENGARUH PERBEDAAN LAJU WAKTU PROSES PEMBEKUAN HASIL COR ALUMINIUM 319 DENGAN CETAKAN LOGAM TERHADAP STRUKTUR MIKRO DAN SIFAT MEKANIS Errens Lowther; Sofyan Djamil; Eddy S Sirdj
Jurnal Ilmiah Teknik Mesin POROS Vol 14, No 1 (2016): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (912.509 KB) | DOI: 10.24912/poros.v14i1.832

Abstract

Abstract: Aluminum alloy is a raw material in industry. Aluminum alloy used is aluminum alloy aluminum alloy 319. Materials were investigated to obtain aluminum alloys that have strong mechanical properties of the difference in the rate of clotting. Research 319 aluminum alloy was investigated by conducting the smelting process in the crank case and printed materials by using metal molds, then do differences in rates of freezing process with an open-air media, media dry sand and wet sand media as a medium deceleration. The next step is testing using tensile testing, testing, hardness with Brinell method, and metallography. From the results, with the help of wet sand media has a hardness of 68 BHN and the UTS 241.89 MPa, for open air medium hardness of 62 BHN and the UTS 224.03 MPa and dry sand media assistance hardness of 54 BHN and the UTS 190.9 MPa. 
PENGARUH MEDIA PENDINGIN PADA PROSES HARDENING MATERIAL BAJA S45C Syaifudin Yuri; Sofyan Djamil; Sobron Yamin Lubis
Jurnal Ilmiah Teknik Mesin POROS Vol 14, No 2 (2016): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (798.193 KB) | DOI: 10.24912/poros.v14i2.838

Abstract

Abstract: Hardening is the process of heating the steel to a temperature of austenite and then dyeing is done quickly, the process is carried out to improve the properties of steel hardness. The method used in this research using books and journal literature .The purpose of this study to determine the mechanical properties of the steel that is cooled by the cooling medium brine , oil, water and air in the cooling medium to the level of violence after the S45C steel is hardened in a hardening process and microstructure . The study starts from the cutting hardness test specimen with a diameter of 65 mm x 7 mm x 10 mm and impact test with a diameter of 10 mm x 10 mm x 55 mm . The results obtained hardness test salt water has the average value of hardness 95 BHN , the average value of hardness oli 89 BHN , the average value of water hardness 94 BHN , the average value of hardness air 87 BHN and hardness values without in hardening 88 BHN , impact test on the air has an average value 1.175 J/
STRUKTUR MIKRO DAN SIFAT MEKANIS ALUMINIUM (Al-Si) PADA PROSES PENGECORAN MENGGUNAKAN CETAKAN LOGAM, CETAKAN PASIR DAN CETAKAN CASTABLE Martinus Mandala; Eddy Siradj; Sofyan Djamil
Jurnal Ilmiah Teknik Mesin POROS Vol 14, No 2 (2016): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.378 KB) | DOI: 10.24912/poros.v14i2.841

Abstract

Abstract: Aluminum foundry is one of the business sectors that to much in demand by the public, ranging from small scale to large scale . Through remelting process, some small-scale aluminum casting industry, using raw materials of used aluminum as the main raw material. Some of the cast products are required to have good quality to comply with quality standards on its use. This study aims to look at the difference in quality of cast aluminum (Al-Si) using three types of mold, the metal mold, sand mold, and the mold castable by testing the mechanical properties of materials that impact and Brinell hardness testing. The method used was experimental or trial. The results obtained are the result cast using a metal mold has a hardness value of the highest of 63 HBN, with a value of impact 37
Co-Authors Eddy S Sirdj Eddy Siradj Errens Lowther Hartono Hartono Martinus Mandala Sobron Y Lubis Sobron Yamin Lubis Syaifudin Yuri