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All Journal SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi Conference SENATIK STT Adisutjipto Yogyakarta Jurnal Engine: Energi, Manufaktur, dan Material Quantum Teknika Vortex Journal of International Conference Proceedings
Istyawan Priyahapsara
Institut Teknologi Dirgantara Adisutjipto
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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.
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
Keandalan Komponen Nose Wheel Assy pada Pesawat Cessna Sri Mulyani; Istyawan Priyahapsara
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 4, No 2 (2023): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v4i2.16357

Abstract

Maintenance is taken to maintain the reliability of the components that support overall nurse performance. One of them is the landing gear which functions for all aircraft movements on the ground including taking off, landing, taxing and parking, and holding the aircraft's load while on land. Nose wheel assy is provided to hold the nose of the aircraft and maneuver while on the ground. Based on information obtained from the engineering department as well as looking at the maintenance logbook on the ATR 72-500 aircraft there was a problem with the nose wheel assy. Where these problems can result in the movement of the aircraft will be problematic. The method used is the Weibull distribution analysis method, the main objective is to determine the failure rate and the reliability of these components as well as to determine the characteristics of the failure modes caused. The parameters used in this distribution are the shape parameter (β) and the scale parameter (h). From the calculation analysis results, it can be seen that the nose wheel assy component based on time failure will function until it fails at the age of 585 hours 38 minutes and β is 3.513864. Following the provisions that apply to values β 1,the type of failure that occurs is a type of failure to wear out. While based on the cycle will function until experiencing failure at the age of 398 hours 13 minutes and β is 1.258549 Under the provisions that apply to values β 1, type failure that occurs is a type of wear out. This type of failure has the property of increasing the failure rate with increasing use, therefore for nose wheel, assy components more effective preventive maintenance is applied.This type of failure has the property of increasing the failure rate with increasing use, therefore for landing gear, assy components more effective preventive maintenance is applied.
Handling Post Flight Documents PT XYZ Soekarno-Hatta International Airport: Human Error Analysis Faturrahman, Mochamad Fikri; Prattiwi, Elisabeth Anna; Priyahapsara, Istyawan; Rahmawati, Fajar Khanif; Lukito, Indro
Journal of International Conference Proceedings Vol 8, No 1 (2025): 2025 ICPM Malaysia Proceeding
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/jicp.v8i1.3904

Abstract

PT XYZ organizes the storage of Post Flight Documents in accordance with the applicable SOP. Post Flight Documents are an important part of flight operations that have an influence on company performance and reputation. Errors in managing Post Flight Documents are mostly caused by human error such as input errors and errors in writing document labels. Data input errors can affect the FATA received by the flight crew. To deal with the occurrence of human error problems, the method that can be used is the Human Error Assessment and Reduction Technique (HEART) method, which is a technique for calculating the probability of human error. The type of research used in this research is descriptive. In this study there were 6 respondents. From the results of data collection and processing using the HEART method in the Post Flight Document handling process, it can be concluded that the activity that has the largest possible error value is in the data entry process into the system which has a HEP value of 4.7607966. Meanwhile, the smallest HEP is found in the task of numbering document packages and creating a receipt record which has a HEP value of 0.02912.
Co-Authors Bahrudin Yusuf Habibie Cristhina, Cristhina Faturrahman, Mochamad Fikri Gunawan Gunawan Izza Rizky Assihhaly Lukito, Indro Meo, Arnoldus Ale Muhammad Fachnoor Latuconsina Pasha, Muhammad Anka Prattiwi, Elisabeth Anna Rahmawati, Fajar Khanif Rindu Alriavindra Funny Sri Mulyani Sri Mulyani Sri Mulyani Wati, Denisa Trisma