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All Journal SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi Conference SENATIK STT Adisutjipto Yogyakarta KACANEGARA Jurnal Pengabdian pada Masyarakat Jurnal Engine: Energi, Manufaktur, dan Material Quantum Teknika Vortex
Istyawan Priyahapsara
Institut Teknologi Dirgantara Adisutjipto
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Karakteristik Minimmum Quantity Lubrication Dengan Pelumas Nabati Terhadap Jarak Potong dan Flank Wear Pahat Carbide Priyahapsara, Istyawan
SENATIK STT Adisutjipto Vol 2 (2016): Peran Teknologi dan Kedirgantaraan Untuk Meningkatkan Daya Saing Bangsa
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.783 KB) | DOI: 10.28989/senatik.v2i0.47

Abstract

Maching using coolant causing environmental problems. Improper coolant waste handling can damage surrounding environment. In Minimum Quantity Lubrication (MQL) there are lubrication that can reduce friction force between tool and working material thereby can reduce the rate of temperature rise, and can impove tool lifeThe purpose of this research is to analyse the use of vegetable oil lubricant as alternative MQL lubricant on cutting distance and flank wear of the work material.This research using vegetable oils consisted of palm oil, coconut oil, soybean oi, and maize (corn) oil. Those vegetable oils were tested their physical properties to be compared with ester oil especially the kinematic viscosity and flash point properties. Turning process were done until flank wear reach 0.3 mm.Soy beam are choose as the best vegetable oil used as MQL. Compared with dry, MQL soy beam produce longer cutting distance. Compared with wet and MQL ester oil, soy beam oil produce shorter life tool.
The Effect of Duration of the Rivet Process on the Strength of Single Lap Joining Priyahapsara, Istyawan
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (587.863 KB) | DOI: 10.28989/senatik.v4i0.230

Abstract

Good airplane joining supports aircraft strength. The general joining process is using rivet as joining method. The parameter that affects the strength during the riveting process is the duration of the rivet head formation. The purpose was to determine the effect of the duration of rivet head formation on the quality of the joint. The research was carried out with the help of homemade tools, to ensure data consistency. The selected riveting duration is 3, 4, 5, 6 seconds. After connection, each connection was tested for strength through tensile testing and macro photo images from the joining. Results show that the 5-second duration provides the best connection with the tensile test results of 165 MPa. Based on the macro photo image, the 5 second rivet process produces the best connection because it produces the biggest rivet body so that it provides the greatest strength compared to the others.
Karakteristik Minimmum Quantity Lubrication Dengan Pelumas Nabati Terhadap Jarak Potong dan Flank Wear Pahat Carbide Priyahapsara, Istyawan
SENATIK STT Adisutjipto Vol 2 (2016): Peran Teknologi dan Kedirgantaraan Untuk Meningkatkan Daya Saing Bangsa
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v2i0.47

Abstract

Maching using coolant causing environmental problems. Improper coolant waste handling can damage surrounding environment. In Minimum Quantity Lubrication (MQL) there are lubrication that can reduce friction force between tool and working material thereby can reduce the rate of temperature rise, and can impove tool lifeThe purpose of this research is to analyse the use of vegetable oil lubricant as alternative MQL lubricant on cutting distance and flank wear of the work material.This research using vegetable oils consisted of palm oil, coconut oil, soybean oi, and maize (corn) oil. Those vegetable oils were tested their physical properties to be compared with ester oil especially the kinematic viscosity and flash point properties. Turning process were done until flank wear reach 0.3 mm.Soy beam are choose as the best vegetable oil used as MQL. Compared with dry, MQL soy beam produce longer cutting distance. Compared with wet and MQL ester oil, soy beam oil produce shorter life tool.
PENGARUH VARIASI FRAKSI VOLUME KOMPOSIT SERAT E-GLASS ±45° POLYESTER 157 BQTN TERHADAP KEKUATAN BENDING DAN GESER Istyawan Priyahapsara; Izza Rizky Assihhaly
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 3 No 2 (2017): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1539.517 KB) | DOI: 10.30738/jst.v3i2.1620

Abstract

Demand of composite as aeronatics material is incresing. It’s light weight, high specific strength, are become a favour of research. Fiber volume Fraction (FVF) is one of important factor on making of composite. The volume ratio between FVF and the resin is affecting its mechanical properties. In this reaserach there were three ratio varation between fiber and the resin. Bending and shear test were conducted through out this research. Results show that, the ductility increased due to the increased of its ratio, but it’s shear stressare decresed.
The Effect of Duration of the Rivet Process on the Strength of Single Lap Joining Istyawan Priyahapsara
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v4i0.230

Abstract

Good airplane joining supports aircraft strength. The general joining process is using rivet as joining method. The parameter that affects the strength during the riveting process is the duration of the rivet head formation. The purpose was to determine the effect of the duration of rivet head formation on the quality of the joint. The research was carried out with the help of homemade tools, to ensure data consistency. The selected riveting duration is 3, 4, 5, 6 seconds. After connection, each connection was tested for strength through tensile testing and macro photo images from the joining. Results show that the 5-second duration provides the best connection with the tensile test results of 165 MPa. Based on the macro photo image, the 5 second rivet process produces the best connection because it produces the biggest rivet body so that it provides the greatest strength compared to the others.
Analisis kualitas sambungan Alumunium 2024 menggunakan metode Friction Stir Welding (FSW) dengan variasi Kekerasan Material Pin Istyawan Priyahapsara; Sri Mulyani
SENATIK STT Adisutjipto Vol 6 (2020): Keselamatan Penerbangan di masa Pandemi Covid-19 [ISBN 978-602-52742-2-0]
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v6i0.400

Abstract

Friction Stir Welding (FSW) sudah menjadi salah satu pilihan muthakir dalam penyambungan struktur pesawat terbang berbahan paduan alumunium 2024 T3. Salah satu parameter penting dalam kualitas pengelasan FSW adalah material pin dengan kekerasan berbeda-beda.. Tujuan penelitian ini adalah untuk mengetahui pengaruh kekerasan material pin terhadap kualitas sambungan secara visual dan kekuatan mekanis sambungan FSW. Tiga jenis material logam digunakan dalam penelitian ini baja ST60, baja ST60 yang dikeraskan, dan baja stainless steel (SS). Material yang disambung alumunium paduan 2024 yang merupakan material untuk struktur skin pesawat terbang. Penyambungan menggunakan mesin mill dengan putaran spindle 1800 rpm, dengan sudut kemiringan pin 3o. Pengujian kekerasan pin, pencatatan temperatur pengelasan, pengamatan visual hasil pengelasan, pengujian tarik dilakukan secara berurutan. Pengujian tarik dilakukan dengan standar ASTM E8, dengan menggunakan mesin Go Tech berkapastas 30 T. Secara visual, ketiganya memperlihatkan topografi pengelasan yang cukup baik dengan rigi-rigi yang rapat. Hasil pengujian kekerasan didapatkan logam SS menghasilkan kekerasan tertinggi dengan nilai 1519.67 HV, diikuti ST60 hardened sebesar 1055.73 HV, dan paling kecil adalah ST60 sebesar 820.81 HV. Kekuatan tarik terbesar diperoleh pada sambungan menggunakan material ST60 hardened dengan nilai 294 MPa, diikuti SS sebesar 259 MPa dan paling kecil adalah ST60 dengan nilai 232 MPa
Ketahanan Korosi Sambungan Friction Stir Welding dengan Variasi Material Pin Tool Istyawan Priyahapsara; Bahrudin Yusuf Habibie
Jurnal Engine: Energi, Manufaktur, dan Material Vol 4, No 2 (2020)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v4i2.768

Abstract

The use of friction stir welding (FSW) for welding materials that have low weldability such as aluminum is a breakthrough in manufacturing. Therefore, FSW is widely used in aircraft structures. FSW has advantages such as superior mechanical properties, green manufacturing, energy saving, and others. Despite its advantages, there have been very few studies analyzing corrosion in FSW. This study aims to find out whether there is corrosion in the FSW connection with the variations of the pin material which serves as a soft metal stirrer in the FSW process. The method of joining the material is carried out by a friction stir welding (FSW) process using the pin tool ST60, ST60 hardened, and stainless-steel with a plate-shaped specimen. After friction stir welding (FSW) connection and temperature measurement on the specimen, then the specimen is cleaned and weighed. After that, corrosion testing was carried out for 14 days (336 hours) using the immersion test method, which was immersed in seawater corrosive media. Calculation of the corrosion rate using the weight loss method. Then take photos of the microstructure to determine the type of corrosion that is formed. The lowest corrosion rate was on the specimen with a stainless-steel pin tool with an average corrosion rate of 0.3254 mpy. The corrosion that is formed on specimens that has been welded is a type of exfoliation corrosion and corrosion causes pits to occur.Penggunaan friction stir welding (FSW) untuk pengelasan material yang memiliki mampu las rendah seperti alumunium merupakan terobosan dalam dunia manufaktur. Oleh karena itu, FSW banyak digunakan dalam struktur pesawat terbang. FSW memiliki keunggulan seperti sifat mekanis yang superior, manufaktur hijau, hemat energi, dan lain lain. Terlepas keunggulannya, hanya terdapat sedikit penelitian yang menganalisis korosi dalam FSW. Penelitian ini bertujuan untuk mencari tahu apakah ada korosi dalam penyambungan FSW dengan variasi material pin yang bertugas sebagai pengaduk logam lunak dalam prosess FSW. Metode penyambungan material dilakukan dengan proses friction stir welding (FSW) menggunakan pin tool ST60, ST60 hardened, dan stainless-steel dengan spesimen berbentuk plat. Setelah dilakukan sambungan friction stir welding (FSW) dan pengukuran temperatur pada spesimen, selanjutnya dilakukan pembersihan spesimen dan penimbangan. Setelah itu dilakukan pengujian korosi selama 14 hari (336 jam) dengan menggunakan metode immersion test yaitu direndam dengan media korosif air laut. Perhitungan laju korosi dengan manggunakan metode weight loss. Kemudian dilakukan pengambilan foto struktur mikro untuk mengetahui jenis korosi yang terbentuk. Nilai laju korosi yang paling rendah yaitu pada spesimen dengan pin tool stainless-steel dengan nilai rata-rata laju korosi 0,3254 mpy. Korosi yang terbentuk pada spesimen yang telah dilakukan pengelasan merupakan jenis exfoliation corrosion dan korosi menyebabkan terjadinya pits.
ANALISIS FAKTOR DELAMINASI PADA MATERIAL SERAT GELAS TERHADAP PARAMETER DRILLING Istyawan Priyahapsara
Vortex Vol 3, No 2 (2022)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (596.425 KB) | DOI: 10.28989/vortex.v3i2.1237

Abstract

Delaminasi adalah sebuah ukuran dari area rusak sekitar lubang (Abdullah, 2019). Delaminasi tinggi bisa mengakibatkan kekuatan struktur yang berkurang. Dalam penelitian ini, akan dilakukan drilling dengan parameter permesinan yang sesuai dalam kaedah permesinan, selanjutnya dilakukan observasi citra makro terhadap lubang yang dihasilkan. Pengujian dilakukan pada material serat gelas 5 layer, dengan pahat drilling diameter 6.3 mm. Parameter drilling menggunakan variasi putaran mesin 1860 rpm, 2920 rpm, 4540 rpm, dan kecepatan pemakanan vertikal (plunging) 0.038 m/menit, 0.067m/menit. Didapatkan hasil nilai terendah delaminasi didapat pada spindle speed 1860 RPM dan plunging rate 0.038 rev/min sebesar 1.24. Nilai tertinggi delaminasi didapat pada spindle speed 4540 RPM dan plunging speed 0.076 rev/min
PRELIMINARY DESIGN OF UNMANNED AIRLAND (PUNA) Istyawan Priyahapsara; Sri Mulyani
Vortex Vol 3, No 1 (2022)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (576.875 KB) | DOI: 10.28989/vortex.v3i1.1186

Abstract

The development of the number of vehicles exceeding the capacity of highways in urban areas causes frequent traffic jams and increases the risk of accidents. This often happens during year-end holidays and Eid holidays. So it is very necessary to monitor traffic density during the annual holiday period to reduce the number of fatalities due to traffic accidents. Monitoring traffic density using helicopters is expensive because of the high fuel consumption and maintenance. So we need a new alternative, namely using Unmanned Aircraft (PUNA) because it is easy to operate and cheap to maintain. So it is very necessary to design PUNA for traffic density monitoring missions. Aircraft for this purpose are classified as small because the payload, namely the camera, only weighs 2 kg. Study obtained the following results: fuselas/body length 1.94 m, wingspan 1.46 m, airfoil NACA 2412. engine OS MAX-40FX, engine located in the nose, take-off Gross Weight 6.11 kg, material weight 321.09 grams, use an Oblique Camera type camera, the camera weight is 2 kg, and the camera position is 3 ft from the nose.
BENDING STRENGTH OF HYBRID COMPOSITE OF GLASS AND NATURAL FIBER PHINEAGE LEAVES Muhammad Fachnoor Latuconsina; Istyawan Priyahapsara
Vortex Vol 2, No 2 (2021)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.252 KB) | DOI: 10.28989/vortex.v2i2.1012

Abstract

The development of composite fibers has developed very much, and to reduce the environmental impact, composite fibers use natural fiber alternatives. The development of composite fibers has developed very much, and to reduce the environmental impact, composite fibers use natural fiber alternatives. One of the natural fibers that are commonly used is natural fiber from pineapple leaves, where natural fiber from ananas leaves is still very minimal in its commercial use and is only considered as waste
Co-Authors Arnoldus Ale Meo Bahrudin Yusuf Habibie Cristhina Cristhina Denisa Trisma Wati Gunawan Gunawan Izza Rizky Assihhaly Muhammad Fachnoor Latuconsina muhammad Pasha Rahmawati, Fajar Khanif Rindu Alriavindra Funny Sri Mulyani Sri Mulyani Sri Mulyani