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Mechanical Properties and Thermal Stability of Epoxy/RTV Silicone Rubber Pakaya, Fahriadi; Ardhyananta, Hosta; Wicaksono, Sigit Tri
IPTEK The Journal for Technology and Science Vol 28, No 1 (2017)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1146.572 KB) | DOI: 10.12962/j20882033.v28i1.2216

Abstract

Epoxy products have been widely applied in industries such as in the fields of automotive, mechanical, electrical, and chemical engineering. Epoxy modified to be done to improve the mechanical properties, thermal stability, physics and chemical resistance. Using of other compounds as curing agents has long been commercialized, but the constraints posed is application of an epoxy thermoset on areas requiring impact strength and thermal stability are still low. One of the modification that has been done is addition of other material as the second material to improve properties of thermoset epoxy. Preparation of research material obtained through the provision of a second material that is RTV silicone rubber. The aim of research to analyze effect of RTV silicone rubber composition (0, 5, 10, 15, 20) wt% of the mechanical properties and thermal stability of thermoset epoxy. Testing and characterization conducted on thermoset epoxy by the addition of RTV silicone rubber. In addition RTV silicone rubber: tensile strength, elongation at break and hardness has decreased, energy and impact strength increased maximum on the addition of 15% RTV silicone rubber respectively 0.294 J and 6175 J / m2. The maximum degradation of temperature increase in the addition of 15% RTV silicone rubber is 328 and 349oC respectively at 5 and 10% degradation.
Analisa Kekuatan Tarik dan Kekuatan Impact Propeller Alumunium Die Casting (ADC) 12 dengan Penambahan Cu-Zn Ahmad Ilham Ramadhani; Barokah Barokah; Fahriadi Pakaya; Jozua Ch. Huwae; Marinus S. Tappy; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
Jurnal Airaha Vol 11 No 01: June 2022
Publisher : Sorong Marine and Fisheries Polytechnic, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ja.v11i01.320

Abstract

Propeller kapal nelayan umumnya terbuat dari aluminium yang mudah mengalami kerusakan pada saat dihantam batu karang, ombak dan mengalami korosi. Maka dilakukan pengembangan dengan penambahan kuningan (Cu-Zn) terhadap material propeller ADC 12. Spesimen berhasil dibuat dengan penambahan 30% Cu-Zn pada ADC 12 dengan menggunakan metode pengecoran yang dilanjutkan pencetakan dengan metode die dan sand casting. Spesimen ADC 12 dan paduan ADC 12+CuZn diuji tarik dan impak sesuai standard ASTM E8 dan ASTM E23 untuk mengetahui perubahan sifat mekanik material tersebut. Berdasarkan hasil pengujian tarik diperoleh bahwa adanya unsur Cu-Zn menurunkan kekuatan tarik ADC 12 (141 MPa) dan paduan ADC 12+CuZn (55,1 Mpa). Hasil pengujian kekuatan impact menunjukkan tingkat kekuatan impact kekerasan rata-rata ADC 12 (15,61 joule) dan paduan ADC 12+CuZn (15,98 joule).
Karakterisasi Sifat Mekanik Komposit Termoset Poliester Tak Jenuh Berpenguat Serat Alam Sebagai Kandidat Material Lambung Kapal Perikanan Fahriadi Pakaya; Joshua Ch. Huwae; Yurika Nantan
JURNAL BLUEFIN FISHERIES Vol 2, No 1 (2020)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.717 KB) | DOI: 10.15578/jbf.v2i1.62

Abstract

Peningkatan kekuatan regangan sekaligus pengurangan polusi di lingkungan laut perlu dilakukan. Peneliti menggunakan serat alam berupa serat eceng gondok sebagai pengganti serat kaca. Tujuan penelitian ini adalah untuk mengetahui seberapa besar kekuatan mekanik komposit berpenguat serat eceng gondok bermatriks Polyester unsaturated dengan perlakuan alkali pada orientasi yang telah ditetapkan dengan perbandingan komposisi serat, sehingga diperoleh komposisi terbaik. Adapun metode yang digunakan yakni melalui perendaman dalam pelarut NaOH 2%. Serat yang telah direndam kemudian di karakterisasi mikrostruktur, setelah itu dilakukan uji penyerapan air dan ketahanan terhadap kimia. Kemudian melakukan uji Tarik komposit dengan komposisi serat sebesar 0, 2, 4, 6, 8, dan 10% berat dari total massa komposit. Hasil penelitian menunjukkan bahwa terjadi penurunan penyerapan air jika dibandingkan dengan serat eceng gondok tanpa perlakuan. Pada ketahanan kimia, terjadi peningkatan ketahanan kimia baik terhadap larutan basa maupun larutan asam. Pada komposit serat alam, tegangan paling tinggi pada komposisi 4% berat sebesar 25,17 N/mm2 dan regangan paling besar pada komposisi 6% sebesar 10,45%.
PENILAIAN TINGKAT TEKNOLOGI GALANGAN KAPAL POLITEKNIK KELAUTAN DAN PERIKANAN BITUNG, SULAWESI UTARA Yuli Purwanto; Fahriadi Pakaya
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.376 KB) | DOI: 10.15578/jbf.v3i2.112

Abstract

Indonesian shipyards are generally dominated by shipyards classified as traditional shipyards. Marine and Fisheries Bitung of Polytechnic dockyard or also known as workshop fishing vessel training is one of the shipyards belonging to the Technical Execution Unit of the Ministry of Maritime Affairs and Fisheries. Currently, the shipyard is only used for repairing fishing vessels with a tonnage of less than 30 GT around the town of Bitung. The shipyard uses a slipway type construction or a pull dock that uses an electric winch. The large number of ship repair requests at Bitung Marine and Fisheries Polytechnic shipyard is the reason for the need to increase the capacity of the shipyard. A technology level assessment should be carried out in order to see to what extent the level of technology which includes components of humanware, technoware, infoware and orgaware meets the needs of ship repair at the shipyard. This research was carried out from June to August 2021 using the case study method and analyzed by calculating the TCC value (technological contribution coefficient) of the technological components of technoware, humanware, infoware and orgaware. The highest contribution value is the infoware component, while the technoware component has the lowest contribution. The marine fisheries Bitung Polytechnic shipyard shows that the value of technological contributions lies in the semi-modern classification. Keywords : technological level, technometric model, shipyard.
PENGARUH KOMPOSISI CU-ZN TERHADAP TINGKAT KEKERASAN DAN STRUKTUR MIKRO ALUMINIUM DIE CASTING (ADC) 12 SEBAGAI BAHAN PROPELLER Ahmad Ilham Ramadhani; Barokah Barokah; Fahriadi Pakaya; Jozua Ch. Huwae; Marinus S. Tappy; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.352 KB) | DOI: 10.15578/jbf.v3i2.114

Abstract

Propeller is one of the important components of a ship. Generally, propellers are made of aluminum which is easily damaged when hit by waves and corrosion. The development is done by adding brass (Cu-Zn) on ADC 12. The sample was successfully made with a ratio of 70% ADC 12 : 30% Cu-Zn using the casting method and then cooled at room temperature followed by die casting and sand casting processes. The sample was tested for hardness using the Rockwell method according to the ASTM E18 standard and the microstructure test on the sample. Based on the test results obtained an average hardness level of 72.6 HRC and the formation of Al-Si-Mg, α-Al, Cu, Zn in the sample which shows the distribution of non-ferrous material in ADC-12. Keywords : ADC 12; Cu-Zn; propeller; microstructure; hardness
EFEK KONFIGURASI BAFFLE PADA HEAT EXCHANGER TYPE SHELL AND TUBE SEBAGAI PEMANAS BAHAN BAKAR BIODIESEL B20 Josua Huwae; Barokah Barokah; Marinus Tappy; Jefta Ratela; Fahriadi Pakaya; Maful Suranto; Baihaqi Baihaqi
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.452 KB) | DOI: 10.15578/jbf.v3i2.109

Abstract

B20 is a fuel that is widely used for combustion systems in diesel engines, especially in Indonesia. Apart from having the advantages, biodiesel B20 also has various disadvantages that affect the performance of diesel engines such as those that have a higher flash point than diesel so that biodiesel is more difficult to burn and has a high viscosity which causes less good atomization of fuel and eventually causes deposits in combustion chamber. One or the solution to the problem is that it can be done carefully. The aim of this research is to make a Shell and Tube Heat Exchanger (STHE) by including the insulation in it to improve the heat exchange performance. The method applied in this research is an experiment by testing the performance of the heat exchanger using a cooling water jacket. Some of the equipment used is a diesel engine from the Mitsubishi Diesel Engine, Type 4d35, 4 cylinder, 75 HP. Data were collected at a constant rotation of 1500 rpm at no load. The results showed that the higher the cooling water temperature of the jacket, the higher the biodiesel temperature. With a cooling water jacket temperature of 83oC, it can heat biodiesel at 74.8oC. Keywords : B20 Fuel Oil; Diesel Engine; Heater; Heat Recovery; Jacket Cooler
Analisa Kekuatan Tarik dan Kekuatan Impact Propeller Alumunium Die Casting (ADC) 12 dengan Penambahan Cu-Zn Ahmad Ilham Ramadhani; Barokah Barokah; Fahriadi Pakaya; Jozua Ch. Huwae; Marinus S. Tappy; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
Jurnal Airaha Vol 11 No 01: June 2022
Publisher : Politeknik Kelautan dan Perikanan Sorong, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.642 KB) | DOI: 10.15578/ja.v11i01.320

Abstract

Propeller kapal nelayan umumnya terbuat dari aluminium yang mudah mengalami kerusakan pada saat dihantam batu karang, ombak dan mengalami korosi. Maka dilakukan pengembangan dengan penambahan kuningan (Cu-Zn) terhadap material propeller ADC 12. Spesimen berhasil dibuat dengan penambahan 30% Cu-Zn pada ADC 12 dengan menggunakan metode pengecoran yang dilanjutkan pencetakan dengan metode die dan sand casting. Spesimen ADC 12 dan paduan ADC 12+CuZn diuji tarik dan impak sesuai standard ASTM E8 dan ASTM E23 untuk mengetahui perubahan sifat mekanik material tersebut. Berdasarkan hasil pengujian tarik diperoleh bahwa adanya unsur Cu-Zn menurunkan kekuatan tarik ADC 12 (141 MPa) dan paduan ADC 12+CuZn (55,1 Mpa). Hasil pengujian kekuatan impact menunjukkan tingkat kekuatan impact kekerasan rata-rata ADC 12 (15,61 joule) dan paduan ADC 12+CuZn (15,98 joule).
Sifat Mekanik Komposit Epoksi dan Poliester Tak Jenuh Sebagai Kandidat Material Pelapis Lambung Kapal Ikan Fahradi Pakaya; Jozua Huwae; Marinus Tappy; Raman Simanjuntak; Yurika Nantan; Wasum Wasum
JURNAL BLUEFIN FISHERIES Vol 5, No 1 (2023)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jbf.v5i1.173

Abstract

Bitung merupakan salah satu kota penghasil ikan yang memiliki ribuan kapal penangkap ikan. Sebagian besar pemilik kapal berbahan dasar kayu di Kota Bitung melapisi lambung kapal kayu menggunakan material komposit Fiberglass Reinforced Polyester (FRP) dan lainnya menggunakan Sand Particle Reinforced Epoxy (PRE) dengan tujuan untuk melindungi lambung kapal tersebut. Penelitian dilakukan dengan tujuan untuk mengetahui kualitas mekanik dari material komposit FRP dan PRE berdasarkan uji tarik dan kekerasan sebelum digunakan untuk melapisi kayu. Metode penelitian bersifat eksperimental dimana untuk material FRP, matriks poliester tak jenuh akan dilapisi dengan 0, 1, 2, 3, dan 4 lapis fiberglass. Pada material PRE, matriks epoksi dicampurkan dengan pasir dengan jumlah kadar 0, 5, 10, 15, dan 20%wt. Hasil uji tarik menunjukkan nilai tegangan tarik material FRP tertinggi pada jumlah lapisan fiberglass sebanyak 3 lapis (194,2 MPa) dan elongasi saat putus tertinggi juga pada 3 lapis serat sebesar 5,46%. Pada material komposit PRE, nilai tegangan tarik tertinggi pada penambahan partikel pasir sebanyak 20%wt (16 MPa) dan elongasi saat putus tertinggi pada komposit PRE dengan kadar pasir 10%wt (1,50%). Hasil uji kekerasan pada material komposit FRP menunjukkan nilai tertinggi pada komposit FRP 4 lapis (81,9 HD) dan material komposit PRE pada 20%wt (85,3 HD). Berdasarkan data disimpulkan bahwa kekuatan tarik material FRP telah memenuhi standar BKI (> 85 MPa) dan kekuatan tarik material PRE tidak memenuhi standar BKI (< 85 MPa) untuk dijadikan sebagai material komposit pembuatan kapal.