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All Journal JMPM (Jurnal Material dan Proses Manufaktur) ARMATUR : Artikel Teknik Mesin dan Manufaktur Automotive Experiences Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Indonesian Journal of Aerospace
Utama, Agus Bayu
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Aerospace Engineering Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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“EFFICIENCY ANALYSIS OF 3 DIFFERENT FUEL TOWARDS GASOLINE FUEL MOTORS ON EME 35 ENGINES IN LAPAN SURVELLANCE UAV-02 (LSU-02)” Ramadhan, M. Fajar; Bismantolo, Putra; Suryadi, Dedi; Utama, Agus Bayu
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 2 (2024): Oktober 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i2.38341

Abstract

This study aims to analyze the efficiency of three different types of fuel on the EME 35 engine on the LSU 02 aircraft. The fuel used is Pertalite, Pertamax, and Pertamax turbo. The method used in this study was an experiment using the LSU 02 aircraft as the research object. The data is taken from measurements of fuel consumption and engine performance on each type of fuel. The analysis is carried out by comparing the efficiency and performance of the engine on each type of fuel used. The results showed that the efficiency and performance of the engine on Pertamax fuel was better than that of Pertamax turbo and Pertalite. Fuel consumption on Pertamax is more efficient than Pertalite and Pertamax turbo, so that Pertamax is more efficient in fuel use. In addition, engines on Pertamax fuel have better performance with greater power and are more stable compared to Pertalite and Pertamax turbo. Therefore, it is recommended to use Pertamax fuel in the EME 35 engine on the LSU 02 aircraft to achieve better efficiency and performance.
The effect of Impact Angle on Dynamic Response of 19 Passenger Commuter Aircraft Windshield against Bird Strike Warsiyanto, Budi Aji; Nurrohmad, Abian; Fitriansyah, Rizky; Utama, Agus Bayu; Sitompul, Sahril Afandi; Yuniarti, Endah
Indonesian Journal of Aerospace Vol. 19 No. 2 (2021)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2021.v19.a3560

Abstract

This paper's objective was to determine the dynamic response of a 19 passenger commuter aircraft windshield to impact angle variations. The phenomenon was performed using the finite element method, and the smoothed particle hydrodynamics (SPH) was chosen as a method for modeling bird material. The elastic-plastic polymethyl methacrylate (PMMA) material with the maximum principal strain failure criterion was used to model the windshield's dynamic response. The variation of the impact angle consists of 15°, 0°, -8°, and -15°, which are measured of the longitudinal axis of the aircraft. The simulation result showed that the impact angle that causes the windshield's dynamic response in the elastic, plastic deformation, and the greatest failure is the angle -15°. The upper end of the windshield (fixed) is the weakest part due to the stress concentration.
RANCANGAN DAN ANALISA SISTEM ORIENTASI TURBIN ANGIN KAPASITAS 2,5 KW Utama, Agus Bayu
Indonesian Journal of Aerospace Vol. 6 No. 1 (2008): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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

Abstract

Telah dirancang satu sistem orientasi dengan rotor eksentrik dan ekor pengarah dengan hinge (sumbu gantung) untuk turbin angin skala kecil kapasitas 2.5 kW, kemudian dilakukan analisa statis rumusan matematis berdasarkan teori kesetimbangan momen pada sumbu menara pada 2 kondisi kecepatan angin yaitu kecepatan angin sampai kecepatan angin rancagan (V ≤ Vdisain) dan kecepatan angin di atas kecepatan angin rancangan (V > Vdisain). Dengan kecepatan angin rancangan Vdisain = 10 m/s, maka nilai γo (sudut serang angin terhadap daun ekor) pada kondisi V ≤ Vdisain , adalah 6.16°. Nilai berat ekor G yang tadinya 250 N harus diturunkan menjadi 209 N, yaitu dengan mengubah nilai berat batang ekor menjadi m1=12.5kg dan nilai berat daun ekor menjadi m2=8.4 kg. Pada kondisi V > Vdisain rotor mulai berputar dengan sudut serang angin terhadap rotor δ.
Analisis Sifat Mekanik Uji Tarik Material Komposit Serat Karbon–Epoksi 1011l dengan Metode Manufaktur yang Berbeda Utama, Agus Bayu; Abdurohman, Kosim; Habibullah, Moh.; Agustian, Rialdi
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11171

Abstract

Carbon fiber reinforced polymer composites are widely used in structural applications due to their high strength-to-weight ratio. Manufacturing methods significantly affect fiber impregnation quality, void content, and mechanical properties. This study investigates the effect of different manufacturing methods on the tensile properties of carbon fiber–epoxy 1011L composites with 0° fiber orientation. Three manufacturing methods were used: hand lay-up (HLU), vacuum bagging (VB), and vacuum assisted resin infusion (VARI). A total of 21 specimens were tested using a Universal Testing Machine (UTM) at the National Research and Innovation Agency (BRIN) following ASTM D3039. The results show that The VARI method showed the best mechanical performance with an average maximum point stress (MPS) of 774,31 MPa and an elastic modulus (ME) of 39.313 MPa, followed by the vacuum bagging and hand lay-up methods. The hand lay-up method produced the lowest MPS and ME values, at 507,72 MPa and 20.401 MPa, respectively. The VARI method produces the best mechanical properties compared to the hand lay-up and vacuum bagging methods.
Effect of Aluminum Hydroxide (Al(OH)3) on the Tensile Strength and Burning Rate of Twill Carbon Fiber/Epoxy Resin Composites Utama, Agus Bayu; Nuranto , Awang Rahmadi; Hafid, M; Nurjaya, Nurjaya; Wibowo, Reson; Firmasyah, Doni; Abdullah, Muhamad Ardi
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 10 No. 2 (2026): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v10i2.31419

Abstract

Carbon fiber reinforced polymer (CFRP) composites are widely used in structural applications due to their high strength-to-weight ratio; however, their epoxy matrix exhibits relatively poor flame resistance. This study investigates the effect of aluminum trihydroxide (ATH) addition on the tensile strength and burning rate (BR) of twill carbon fiber/epoxy composites. The composites were fabricated using a vacuum bagging method to ensure improved resin impregnation and uniform filler distribution. ATH content was varied at 0%, 5%, 10%, and 15% by weight of resin. Tensile testing was conducted according to ASTM D3039, while BR testing was performed based on ASTM D635. A total of 28 specimens were subjected to tensile testing using a universal testing machine, while 12 specimens were used for BR testing based on ASTM standards. The results show that tensile strength decreases from 482.09 MPa (0% ATH) to 376.30 MPa (15% ATH). This corresponds to a reduction of approximately 21.9%. In contrast, the BR decreases from 2.86 mm/s to 1.65 mm/s, indicating an improvement in flame resistance of approximately 42.3%. The addition of ATH improves fire resistance through endothermic decomposition and water vapor release, which reduces heat and slows flame propagation. However, it negatively affects mechanical performance due to particle agglomeration and weakened interfacial bonding. Considering the balance between tensile strength and flame resistance, the 10% ATH composition may provide the most balanced composite performance in this study. This study highlights a trade-off between mechanical properties and fire resistance in composite materials.
Effect of Manufacturing Route and Fiber Orientation on the Mechanical Performance of Carbon Fiber Composites for Automotive Lightweight Components Abdurohman, Kosim; Adhitya, Mohammad; Istiyanto, Jos; Kurniawan, Farohaji; Habibullah, Mohammad; Agustian, Rialdi; Pratama, Mikhael Gilang Pribadi Putra; Utama, Agus Bayu; Aritonang, Rian Suari
Automotive Experiences Vol. 9 No. 2 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.16310

Abstract

This study evaluates the effects of manufacturing method and fiber orientation on the mechanical performance of carbon fiber-reinforced polymer (CFRP) composites for automotive applications. Unidirectional CFRP laminates were fabricated using vacuum bagging (VB), vacuum-assisted resin infusion (VARI), and hand lay-up (HLU). Specimens with 0° and 90° fiber orientations were tested under tensile and compressive loading, while ±45° specimens were evaluated for in-plane shear response through tensile testing. Short-beam and V-notched beam tests were conducted to determine interlaminar shear and shear properties. Microstructural characterization of the manufactured laminates and fractured specimens was performed using CT-scan and SEM, supported by finite element validation. Unlike previous studies focusing on limited properties or a single manufacturing route, this work provides a comprehensive comparison of HLU, VB, and VARI CFRP laminates by integrating mechanical testing, defect analysis, fracture observations, and numerical assessment. The results show that VARI produced superior laminate compactness and the highest tensile-related properties, although this improvement did not correspond to higher interlaminar shear strength, highlighting the influence of manufacturing-induced laminate architecture. For 0° specimens, ultimate tensile strengths were 507.72 ± 52.14 MPa for HLU, 685.69 ± 62.65 MPa for VB, and 774.31 ± 58.18 MPa for VARI. At ±45°, tensile strengths were 20.85 ± 0.82, 21.20 ± 0.45, and 22.18 ± 0.81 MPa, respectively. At 90°, manufacturing method had no significant effect on tensile strength, although tensile modulus remained method-dependent. The highest 0° compressive strength was obtained by HLU at 124.8 ± 13.1 MPa, whereas VARI showed the highest 90° compressive strength at 44.60 ± 0.82 MPa. VARI exhibited lower shear and interlaminar shear strengths of 15.31 ± 1.01 and 13.68 ± 0.85 MPa, respectively, indicating that increased fiber volume fraction did not substantially improve these properties. Nevertheless, VARI achieved the highest tensile and shear moduli, reaching 39.31 ± 4.58 GPa and 1.50 ± 0.15 GPa. Microstructural observations confirmed that improved resin distribution, reduced defects, and stronger fiber–matrix bonding in VARI contributed to enhanced overall mechanical performance. These findings demonstrate that manufacturing route governs different failure mechanisms and should therefore be selected according to the dominant loading mode and required laminate properties.
Co-Authors Abdullah, Muhamad Ardi Abdurohman, Kosim Agustian, Rialdi Aritonang, Rian Suari Bismantolo, Putra Budi Aji Warsiyanto Dedi Suryadi Endah Yuniarti, Endah Firmasyah, Doni fitriansyah, Rizky Habibullah, Moh. Habibullah, Mohammad Hafid, M Jos Istiyanto KURNIAWAN, FAROHAJI Mohammad Adhitya, Mohammad Nuranto , Awang Rahmadi NURJAYA NURJAYA, NURJAYA Nurrohmad, Abian Pratama, Mikhael Gilang Pribadi Putra Ramadhan, M. Fajar Sahril Afandi S Wibowo, Reson