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All Journal INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni FLYWHEEL : Jurnal Teknik Mesin Untirta Planta Tropika Conference SENATIK STT Adisutjipto Yogyakarta Angkasa: Jurnal Ilmiah Bidang Teknologi Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal PADMA: Pengabdian Dharma Masyarakat Vortex Jurnal Peradaban Masyarakat (JPM) Mestaka: Jurnal Pengabdian Kepada Masyarakat AME (Aplikasi Mekanika dan Energi) : Jurnal Ilmiah Teknik Mesin Hikamatzu Journal of Multidisciplinary Research Journal of Integrated Knowledge and Innovation
Fajar Nugroho
Institut Teknologi Dirgantara Adisutjipto
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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INFLUENCE OF PANDANUS TECTORIUS LEAF FIBER ON MECHANICAL PROPERTIES AND MORPHOLOGY OF POLYPROPYLENE COMPOSITE Fajar Nugroho; Sudarmanto Sudarmanto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2757.963 KB) | DOI: 10.28989/angkasa.v12i1.536

Abstract

Natural fiber reinforced polymer composites are widely developed because of their relative low price and eco-friendly. One of natural fiber sourches is pandanus tectorius leaf.  This study aimed to determine the effect of variations in fiber volume fraction on tensile strength, impact strength, bending strength and morphological on sea pandanus fibers- polypropylene composites.Tensile test spesimen refer to ASTMD 638, impact test spesimen refes to ASTMD 5942-96, bending test spesimen refer to ASTMD 790 -02. The increasing of the volume fraction increased  the tensile strength and impact strength. The tensile test results showed the highest tensile strength results for composites with a volume fraction of 35% was 25.82 MPa. The impact test results showed that the highest impact strength was obtained in the 35 % volume fraction of 0.0062 Joule/mm2. The bending test results showed that the highest bending strength was obtained in the 20% volume fraction of 24.96 MPa. Based on SEM test results, there were voids, cracks, fibers pull out on the composite.
PENGARUH RAPAT ARUS ANODIZING TERHADAP NILAI KEKERASAN PADA PLAT ALUMINIUM PADUAN AA SERI 2024-T3 Fajar Nugroho
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (224.803 KB) | DOI: 10.28989/angkasa.v7i2.147

Abstract

Aluminum alloy AA 2024-T3 is widely applied in the aircraft industry because it has good mechanical properties such as; light weight, good conductivity and the corrosion resistance. However Aluminium 2024-T3 susceptible to wearing. One method to improve the wear resistance o f AA 2024-T3 is the anodizing process. The aims of this research to study the effect of current density and anodizing time against the hardness of aluminum alloy AA 2024-T3. The process of anodizing was carried out using 10 percent sulfuric acid solution with the current density of 1.5 Ampere per decimeters square, 3.0 Ampere per decimeters square and 4.5 Ampere per decimeters square with immersion times of 30, 40, 50 and 60 minutes. Furthermore, the surface hardness was measured by using the Vickers hardness test method. As the supporting data the composition of the test conducted, testing the microstructure, and vickers hardness test. This study shows that the surface hardness of aluminum alloy AA 2024-T3 is influenced by the current density and anodizing time with varying values. Its shows that higher current density o f the anodizing caused optimal time tends to be short. The longer anodising time it will produce greater layer of aluminum oxide.
STUDI PENGARUH PROSES MANUFAKTUR KOMPOSIT BERMATRIK EPOKSI TERHADAP KEKUATAN TARIK DAN IMPAK PADA KOMPOSIT HYBRID BERPENGUAT SERBUK KAYU ALBASIA DAN SERAT GELAS Fajar Nugroho
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.v2i0.65

Abstract

A composite material is very efficient to use at a structure which needs a combination between strength and stiffness and light weight. The advantage of composite material compared to a metal is corrosion resistance, accessible, and reasonable price. This study aims to determine the tensile and impact strength composites of the epoxy matrix composite reinforced by glass fiber and albsia sawdust.The composites were made using variations of stirring time 15 minutes and 30 minutes with a stirring speed of 658 rpm and 858 rpm. The composite were made using variations of the drying temperatures 40ºC, 50ºC, 60ºC, 70ºC, and the room temperature. The reinforced materials is used  albasia sawdust and woven glass fiber. The matrix was Epoxy Resin Bakelite EPR 174 and Epoxy Hardener V-140. The methodology for making the composite test specimens particles was hand lay-up (open mold). The highest tensile strength testing on a composite was 37.92 MPa with a stirring time of 30 minutes and 858 rpm stirring rotation. For the impact testing, the highest visible impact at 0.0024 J/mm² in the composite with a stirring time of 15 minutes and 858 rpm stirring rotation. Through this test, it was obtained the highest tensile strength of 43.03 MPa in the composite with 50ºC drying temperature variation. Meanwhile, the composites with 60ºC drying temperature variation had the highest impact strength with a value of 0.0037 J/mm². The composite material composition and morphology of the fracture were analyzed by SEM observation. 
Pengenalan Teknologi Informasi pada Anak Panti Asuhan dalam Rangka Pembinaan Potensi Dirgantara Dedet Hermawan Setiabudi; Abdul Haris Subarjo; Fajar Nugroho; Sudarmanto Sudarmanto; Eli Kumolosari; Bambang Sudibyo
Jurnal Padma: Pengabdian Dharma Masyarakat Vol 3, No 3 (2023): PADMA JULI 2023
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jpdm.v3i3.32199

Abstract

Kegiatan pengabdian kepada masyarakat diselenggaran dengan tujuan untuk memberikan pemahaman tentang teknologi informasi yang merupakan salah satu konsentrasi bidang di Institut Teknologi Dirgantara Adisutjipto, kegiatan pengabdian masyarakat dilaksanakan secara tatap muka langsung. Kegitan pengabdian masyarakat ini juga dalam rangka pembinaan potensi kedirgantaraan. Kegitan pengabdian masyarakat dilaksanakan dengan metode ceramah presentasi dan ditutup dengan sesi tanya jawab, pada sesi tanya jawab peserta kegiatan dapat bertanya pada presenter, presenter juga dapat bertanya pada peserta kegitan mengenai materi yang telah diberikan. Pada kegiatan pengabdian masyarakat ini peserta cukup antusias, hal tersebut terlihat jumlah peserta yang hadir tidak mengalami penurunan dari awal sesi kegiatan sampai dengan akhir kegitan. Peserta juga cukup antusias dalam menjawab pertanyaan dari presenter.
Effects of Calsium Carbonat on Hardness and Wear Behaviour of Brass-Epoxy Brake Lining Pad. Nugroho, Fajar
SENATIK STT Adisutjipto Vol 5 (2019): Peran Teknologi untuk Revitalisasi Bandara dan Transportasi Udara [ISBN 978-602-52742-
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v5i0.314

Abstract

Brake lining pad is important in driving safety. It must be able to stop the vehicle as quickly as possible. Calcium carbonate is The purpose of this study was to identify the effect of calcium carbonate to the brake brass-epoxy lining pad. Calcium carbonate meet have good physical properties, such as having low porosity and fine particles while brass has a good heat conductor and is corrosion resistant so it is resistant to heat. The tests carried out on brake pads include wear and hardness tests. The results showed that the optimal wear rate in a dry state (40% calcium carbonate-20% brass-40% epoxy) was 0.0352 mm²/kg. While the wear rate in wet conditions (20% calcium carbonate-40% brass-40% epoxy) was 0.0396 mm²/kg. The hardness brake lining pad (20% calcium carbonate - 40% brass -40% epoxy) was  176.44 kg/mm².
Study on the Effect of Post Weld Heat Treatment (PWHT) Time on the Tensile Strength and Hardness of TIG Weld Joint of Motorcycle Crankcase Nugroho, Fajar
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.v4i0.163

Abstract

Postweld heat treatment (PWHT) is a common practice among building codes to reduce the residual stress, improve the ductility, and decrease the defects. This article describes the welding joint property of motorcycle crankcase material by taking tungsten inert gas (TIG) welding measures before PWHT on 200°C with holding time of 0,4,6, 8 hours. Test data were analyzed in relation to tensile strength, hardness and microstructure on the welding joint. The regions corresponding to the base metal (BM) and heat-affected zone (HAZ) were studied. The effect of holding time under PWHT on properties of joints can be investigated. The results demonstrated that micro-hardness in the weld and tensile strength decreased with PWHT time prolonging, while tensile strength increased with the extension of PWHT time. The microstructure before PWHT was coarse in the joint. With the extension of holding time under PWHT, the structure obtains fine grain and the characteristic becomes obvious.
PENGARUH KANDUNGAN PARTIKEL SERBUK GENTENG SOKKA TERHADAP KEKUATAN TARIK DAN KEKUATAN IMPAK PADA KOMPOSIT BERMATRIKS EPOXY Nugroho, Fajar
SENATIK STT Adisutjipto Vol 3 (2017): Dukungan Teknologi Untuk Pengembangan Industri Dirgantara Indonesia
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v3i0.121

Abstract

Composites consist of two or more separate materials combined in a macroscopic structure. This is different from alloy which is the structural unit is formed microscopiccally. At this research, the composite reinforcement was made of sokka Kebumen powder tile using epoxy formatrix. The percentage variations of volume fraction are 0%, 10%, 20%, 30%, and 40% with a mesh size of 180-200 mesh. This study aims to determine the tensile strength, impact strength, and SEM. The method used during the manufacturing process of composite was vacum molding. The tensile strength test showed the highest value was at 10% volume fraction with 49,946 MPa. The lowest value was at 40% volume fraction with 27,618 MPa. The impact strength test showed the highest value was at 10% volume fraction with 0,03925 J/mm2. The lowest value was at 40% volume fraction with 0,03375 J/mm2. The higher the percentage volume fraction of sokka tile powder, the lower the tensile strength and the impact strength of the composites have. The SEM test showed that there was still pull out at the side. 
Peningkatan Pengetahuan Manfaat Haki bagi UMKM di Kelurahan Banguntapan, Kecamatan Banguntapan, Kabupaten Bantul Santoso, Djarot Wahju; Subarjo, Abdul Haris; Nugroho, Fajar; Setiabudi, Dedet Hermawan; Sudarmanto, Sudarmanto; Kumolosari, Eli; Triwibowo, Nur Ahmad
Jurnal Peradaban Masyarakat Vol. 3 No. 6 (2023): Jurnal peradaban masyarakat (JPM)
Publisher : LPPM STIE Hidayatullah Depok

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55182/jpm.v3i6.338

Abstract

Bagi sebagian orang belum mengerti apakah yang disebut dengan Hak Atas Kekayaan Intelektual (HAKI), Hak Kekayaan Intelektual (HaKI) telah berkembang jenisnya. Pada 20 Desember 2000 HaKI juga meliputi bidang-bidang: Desain Industri. Desain Tata Letak Sirkuit Terpadu. dan Rahasia Dagang. Desain Industri memberikan perlindugan bagi karya intelektual yang berhubungan dengan bentuk. konfigurasi garis warna. atau garis dan warna yang memberikan kesan estetis. Desain Industri harus dapat diwujudkan dalam pola tiga atau dua dimensi serta bisa dipakai untuk menghasilkan suatu barang. komoditas industri atau kerajinan tangan. Desain Tata Letak Sirkuit Terpadu mengatur perlindungan yang berhubungan dengan semi konduktor. Rahasia Dagang merupakan perlindungan terhadap informasi yang tidak diketahui oleh umum di bidang teknologi dan/atau bisnis; informasi tersebut harus bernilai ekonomi, yang dapat digunakan dalam kegiatan usaha, serta kerahasiaannya dijaga oleh pemilik Rahasia Dagang. HaKI adalah sarana bagi para pengusaha untuk meningkatkan daya saing mereka. Fakta menunjukkan beberapa perusahaan yang menonjol di bidangnya berkat penggunaaan karya intelektual.
MANAJEMEN PRODUKSI PESAWAT TERBANG TANPA AWAKUNTUK MENUNJANG KEMANDIRIAN INDUSTRIPERTAHANAN Subarjo, Abdul Haris; Setiabudi, Dedet Hermawan; Santoso, Djarot Wahju; Nugroho, Fajar; Retnowati, Nurcahyani Dewi
Hikamatzu | Journal of Multidisciplinary Vol. 1 No. 2 (2024): multi science and knowlegde
Publisher : Hikamatzu | Journal of Multidisciplinary

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bangsa Indonesia memiliki keinginan untuk membangun suatu industri pertahanan yang kuat dan mandiri tidak bergantung pada Bangsa lain. Dengan Manajemen Industri pertahanan yang kuat dan mandiri maka kedaulatan dan kewibawaan suatu negara berpengaruh dalam mempertahankan negaranya. Undang-Undang RI no.16 Tahun 2012 menyatakan industri pertahanan meliputi empat bidang yaitu industri alat utama, industri komponen utama dan penunjang, industri komponen dan pendukung serta industri bahan baku. Salah satu produk industri alat utama pengembangan dan produksi Pesawat Terbang Tanpa Awak oleh Badan Usaha Milik Negara (BUMN) dan Badan Usaha Milik Swasta (BUMS). Untuk itu maka diperlukan manajemen produksi UAV pada industri dalam negeri tersebut dalam mendukung kemandirian industri pertahanan menjadi objek penelitian. Penelitian menggunakan metode kualitatif dengan pendekatan studi pustaka. Metode penelitian kualitatif dapat menyediakan data yang kaya dan holistik, menyediakan pemahaman atas proses yang berkelanjutan, berfokus pada studi pustaka dalam konteks tertentu, menginterpretasikan dan menjelaskan lebih dalam mengenai data kualitatif. Data-data yang diperoleh dikondensasi dan dianalisis menggunakan teknik analisis deskripsi kualitatif.
Analisis CFD Aliran Dua-Fasa Uap Air pada Pipa Geothermal Horisontal Kumolosari, Eli; Dinaryanto, Okto; Wibowo, Teguh; Setiabudi, Dedet Hermawan; Nugroho, Fajar; Pinandhita, Lazuardy Rahendra; Kurniawan, Freddy
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 17, No 1 (2025): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v17i1.2647

Abstract

Two-phase flow is a phenomenon that often found in various devices and fields, one of which is in the geothermal system. Two-phase flow parameters that are important to study include flow patterns, pressure drop, and water holdup. This study used the CFD method to obtain data on flow patterns, pressure drop, and water holdup in steam-water flow in horizontal pipes. Validation studies were conducted to obtain appropriate settings. The superficial velocities of steam and water were varied from 6-30 m/s and 0.05-0.1 m/s respectively. The results showed that the CFD results were in accordance with the experiments. Visually, the observed flow patterns were stratified-wavy flow and mist flow. Furthermore, the pressure drop and water holdup values obtained increased along with the increase in the JW value.
Co-Authors Abdul Haris Subarjo Abdul Haris Subarjo abdul haris subarjo, abdul haris Adi Setiawan Ahmad A, Dadang AKTAVIA HERAWATI Among Herahli Anna Prattiwi, Elisabeth Anna Bachtiar, Muhamad Irfan Bambang Sudibya Bambang Sudibyo Dedet Hermawan Setiabudi Dedet Hermawan Setiabudi Dedet Hermawan Setiabudi, Dedet Hermawan Djarot Wahju Santoso Djarot Wahju Santoso Dwi Hartini Eko Yulianto Eli Kumolosari Fahril Khairullah Freddy Kurniawan GUNARSO GUNARSO Irfansyah, Rahmat Jaka Suyana Kurniawan, Muh. Firdaus Agung Kunto Kusumawardani, Mawar Laia, Dominikus Yoeli Wilson Mahardhika, R. Hernan Maizetri, Resti Mawar Kusumawardani Muga, Yohanes Fernando Leo Mujiyo Nugraha, Meilissar Salahuddin Alif Rahman Nur Akhmad Triwibowo Nurcahyani Dewi Retnowati Nurfi Ahmadi Nurfi Ahmadi Nurfi Ahmadi Nurfi Ahmadi, Nurfi Octavia, Dyla Midya Okto Dinaryanto Pinandhita, Lazuardy Rahendra Prattiwi, Elisabeth Anna R. Nur Ahmad Triwibowo Resa Fadhol Ilahi Santoso, Prasidananto Nur Sarif Hidayat, Sarif Sri Widata Sudarmanto Sudarmanto Sudarmanto Sudarmanto, Sudarmanto sudarmanto, Sudarmanto sudarmanto Teguh Wibowo Triwibowo, Nur Ahmad Wibowo, Irfan