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All Journal Journal of Dentistry Indonesia Rekayasa Mesin Quantum Teknika Mechanical Engineering for Society and Industry Automotive Experiences Recent in Engineering Science and Technology Prosiding SNTTM Indonesian Journal of Aerospace TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Mohammad Adhitya, Mohammad
Department Of Mechanical Engineering Universitas Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Comparison of Popular Three-Dimensional Printing Materials for Oral and Maxillofacial Surgical Guidance Model Adhitya, Mohammad; Sunarso, Sunarso; Muis, Abdul
Journal of Dentistry Indonesia Vol. 27, No. 3
Publisher : UI Scholars Hub

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

Abstract

The application of three-dimensional (3D) models in the medical field has become popular. However, the accuracy of 3D models for surgical guidance varies among different materials and 3D printing technologies, such as printing machine usage. Objectives: This study aims to obtain more information about the effect of three different materials printed using a fused deposition material printer from the same digital data source. This study also aims to compare, analyze, and test the materials’ ability. Methods: Each of the filament materials (acetylbutane stearate [ABS], polylactic acid [PLA], and high-impact polystyrene [HIPS]) are printed at two infill densities, their weight, volume, and dimension are measured, and infill materials are prepared. Printing time is estimated and calculated on the basis of printing properties by using Simplify3D© software. The strength and surface tension of each sample are examined via a drilling test. Results: PLA is better than ABS and HIPS for printing our 3D model because of its properties. Conclusion: Ideal 3D materials for printing 3D models should fulfill the criteria on accuracy, strength, weight, and durability for usage. However, production time and cost should also be considered.
Desain Transmisi Hidrostatik untuk Roda Penggerak pada Mobil Terbang Faiz Akbar Pradipta; Mohammad Adhitya
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 6 No. 1 (2024): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v6i1.22104

Abstract

A flying car can fulfill two functions, as a vehicle on the road and as an airplane that capable of flying. To reduce aerodynamic drag, the drive wheels must be able to fold so that a flexible transmission system is required. The Hydrostatic Transmission (HT) system is a flexible transmission that uses a hose to connect hydraulic pump, which is coupled to the engine, to hydraulic motor, which is coupled to the wheel. This research analyzes the specifications of hydrostatic transmission components to optimally transmit power from a V6 engine to two drive wheels through a speed gear transmission system. The hydrostatic transmission system specifications, which include pumps, motors, hoses, charge pumps, and release valves, are analyzed using Simscape MATLAB software. This software enables the user to easily modify the parameters to build an optimal hydrostatic transmission design. To ensure optimal performance of the entire flying car propulsion system, a 60kW pump and 20kW motor are required.
OPTIMIZATION OF LIGHTWEIGHT ELECTRIC BUS FRAME DESIGN THROUGH VALUE ENGINEERING APPROACH: A SYSTEMATIC REVIEW AND PARAMETRIC FEASIBILITY ANALYSIS Artana, I Nyoman; Sumarsono, Danardono Agus; Huda, Mahfudz Al; Adhitya, Mohammad
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.2119

Abstract

Lightweight frame design plays a critical role in improving the efficiency and sustainability of electric buses. This study aims to explore the optimization of electric bus frame design through the application of Value Engineering (VE), using a systematic literature review (SLR) supported by technical simulation references. The review focused on key parameters, including material selection, structural topology, component dimensions, and production costs, analyzed across more than 40 publications from reputable databases over the past decade. Various studies demonstrate that substituting conventional steel with aluminum alloy 6063 can reduce frame weight by up to 30%, while topology optimization based on Finite Element Analysis (FEA) achieves more efficient load distribution and structural integrity.  Additionally, shifting from manual to robotic welding methods has shown to enhance production efficiency by approximately 20%. Despite higher initial costs, VE supports long-term benefits by reducing operational costs, improving energy consumption, and aligning with sustainability goals. The findings suggest that integrating VE into the early stages of electric bus frame design offers a strategic pathway toward lighter, safer, and more cost-effective transportation solutions.
Effect of Hybridization on Tensile, Shear and Compressive Properties of Carbon Based Fiber Reinforced Composites Abdurohman, Kosim; Adhitya, Mohammad
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.a3575

Abstract

The high specific stiffness and strength of composites make them widely used  in defence, marine, and aerospace applications. Hybrid composites have increased use in high-tech applications. The glass/carbon and KC/carbon hybrid composites manufactured by vacuum assisted resin infusion methods are used in this study. The matrix used for both composites are vinylester resin. The glass/carbon and KC/carbon hybrid laminates arrangement is [G/C/G2/C/G2/C]s and [(KC)2/C3]s, respectively. The mechanical properties are evaluated according to ASTM standards. Fracture micrograph analysis are investigated using SEM. The comparison of mechanical properties and surface fracture of both hybrid composites have been investigated. The tensile and compressive strength of KC/carbon are higher than glass/carbon hybrid composites. However, the shear strength of KC/carbon is lower than glass/carbon hybrid composites. SEM micrograph exhibits that the KC/carbon has a good fiber/matrix and interlayer bond better than glass/carbon hybrid composites.
Analisis Kekuatan Struktur Komposit Dengan Ply Drop-off Pada Roda Pendarat Utama Pesawat Nir Awak Menggunakan Metode Elemen Hingga Wandono, Fajar Ari; Adhitya, Mohammad
Indonesian Journal of Aerospace Vol. 17 No. 1 Juni (2019): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2019.v17.a3037

Abstract

Penggunaan ply drop-off telah banyak digunakan untuk mengoptimalkan struktur komposit sehingga memiliki massa yang lebih ringan dibandingkan dengan struktur komposit dengan penggunaan ketebalan seragam. Tulisan ini akan memprediksi kekuatan dan potensi pengurangan massa struktur komposit dengan menggunakan ply drop-off pada roda pendarat utama pesawat nir awak terhadap beban operasional menggunakan metode elemen hingga. Beban operasional diasumsikan merupakan beban statik akibat landing sebesar 245 N arah vertikal dan sebesar 78.75 N arah horizontal. Struktur roda pendarat utama dimodelkan menggunakan elemen Quad4 dengan memasukkan sifat mekanis dari material e-glass Woven Roving 185 pada software MSC. Patran/Nastran. Kriteria kegagalan yang digunakan adalah berdasarkan kriteria kegagalan Tsai-Wu dalam indeks kegagalan dan margin of safety. Hasil yang didapatkan adalah struktur roda pendarat utama memiliki indeks kegagalan 0.62 dan margin of safety sebesar 1.39. Dari hasil tersebut menandakan struktur roda pendarat utama cukup kuat dan tidak terjadi kegagalan dalam menerima beban operasional yang diberikan. Di samping itu, potensi pengurangan massa pada struktur roda pendarat utama menggunakan ply drop-off adalah sebesar 18%.
Experimental Stress Analysis on Frame Structure of A 70-Passengers Electric Bus Stevanus Brian Kristianto; Mohammad Adhitya; Budi Haryanto; Lukyawan Pama Deprian; Umar Abdul Aziz; Ridho Dwimansyah; Danardono Agus Sumarsono
Automotive Experiences Vol. 8 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13757

Abstract

Structural strength testing of buses using static vertical load has not previously been explored to validate the structural integrity of bus frames. In this study, the static vertical load method was employed to validate the structural strength of the Universitas of Indonesia electric bus, which utilizes two different materials SS400 for the lower frame and Aluminum Alloy 6061 for the upper frame. Finite Element Analysis (FEA) was conducted to identify critical areas on both the lower and upper frames. The stress values in the simulation were also obtained at the same location as the strain gauge placements in the experiment. Experimental vertical load testing was carried out by incrementally applying a load of 1000 kg up to the equivalent of 70 passengers, with an additional dynamic coefficient of 30% resulting in a maximum load of 6850 kg. Strain measurements were taken using 20 strain gauges on the lower frame and 8 on the upper frame. The experimental result showed the highest stress occurred at strain gauge no. 9 on the lower frame, measuring 78.10 MPa, and 15.32 MPa on the upper frame under 6850 kg load. The comparison between the simulation and experimental results reveals an 18% deviation. Nevertheless, both methods indicate the same critical area of the structure. The stress distribution indicated that the central deck area of the lower frame, where passengers sit and stand, experienced the highest loads. On the upper frame, significant stress was observed in the area where the air conditioning system is mounted. These findings demonstrate that static vertical load testing can be effectively used to validate the structural strength and stress distribution of electric buses, particularly in areas subject to concentrated loading.
Brake failure and fault detection in heavy vehicles : trends, challenges, and research gap from a systematic literature review Sepriyanto; Danardono A Sumarsono; Mohammad Adhitya; Sholahudin
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 13 No 2 (2026): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v13i2.2164

Abstract

Brake failure in heavy vehicles, particularly trucks and buses, continues to be a major contributor to severe traffic accidents, especially on long downhill routes where braking systems are subjected to sustained thermal and mechanical loads. Although numerous approaches for brake fault detection and diagnosis have been proposed over the past decade, most studies remain confined to laboratory environments or simulation-based analyses and predominantly target passenger vehicles. This systematic literature review provides a critical examination of existing research on brake failure and fault detection, with a specific focus on heavy vehicle applications. A structured search of the Scopus database was conducted using the keywords (“brake failure” OR “brake fault”). AND vehicle*, covering publications from 2016 to 2025. Following the PRISMA framework, 32 relevant articles were selected from an initial set of 134 records. The selected studies were analyzed in terms of methodological approaches, key findings, reported limitations, and research contributions. The results reveal a notable increase in research activity since 2020, driven mainly by sensor-based techniques, physical modeling, and artificial intelligence–based methods. However, studies explicitly addressing heavy vehicles and validated under real-road operating conditions remain limited. This review synthesizes current research trends, clarifies unresolved gaps, and outlines future research directions, particularly in the areas of multi-sensor data integration, intelligent diagnostic algorithms, and Digital Twin–enabled predictive maintenance, to enhance brake failure detection and overall heavy vehicle safety.
Evaluasi keselamatan kebakaran kendaraan bermotor Yulianto Sulistyo Nugroho; Reza Adyanto Nugroho; Mohammad Adhitya; Muhammad Agung Santoso
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/qmde8743

Abstract

Risiko kebakaran kendaraan bermotor terus meningkat sejalan dengan meningkatnya populasi kendaraan bermotor serta mobilitas masyarakat. Kebakaran kendaraan bermotor dapat terjadi di perjalanan, di stasiun pengisian bahan bakar umum atau di dalam bangunan saat kendaraan di parkir. Kebakaran kendaraaan bermotor bukan saja menimbulkan kerusakan pada kendaraan, bangunan gedung parkir, tetapi juga dapat mengakibatkan cidera bahkan fatalitas penumpang kendaraan bermotor tersebut. Risiko kebakaran kendaraan bermotor baik berupa kendaraan dengan mesin pembakaran dalam (internal combustion engine - ICE) atau kendaraan listrik (electric vehicle – EV) ditandai dengan laju pelepasan kalor (heat release rate) akibat terbakarnya komponen / bahan mampu bakar yang ada di dalam kendaraan, maupun terbakarnya bahan bakar atau baterei sebagai sumber energi penggerak utama kendaraan bermotor. Untuk memberikan Gambaran mengenai risiko kebakaran kendaraan bermotor, makalah ini menyajikan metode pengukuran laju pelepasan kalor, kaji literatur hasil pengukuran eksperimental, dan evaluasi keselamatan kebakaran kendaraan bermotor sebagai upaya meningkatkan kepedulian dan keselamatan masyarakat pada umumnya.   
Optimizing the performance of gasoline-ethanol-methanol fueled engines with variations in the air-fuel ratio Mokhtar; Danardono Agus Sumarsomo; Askar Adika Agama; Mohammad Adhitya
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/638pey73

Abstract

The 125 cc, four-stroke, air-cooled, electronic fuel injection SI engine for motorcycles was used to compare the effects of mixing methanol and ethanol with gasoline on engine power, fuel efficiency, and engine emissions. The test took place on the engine test bench. the fuel blending variation is 80% gasoline with various methanol-ethanol percentages. The result shows that The maximum torque value of all fuel mixture variants is achieved in the M20 mixture at λ= 0.9 at 6000 RPM, namely 8.52 Nm. The power value shows the highest value in the M20 mixture with λ= 1.1, namely 6.45 kW and the lowest value of SFC is 266.3 g/KWh obtained by the E10M10 mixture at 6000 RPM engine speed at λ=1.3
Tahapan Dalam Desain Konseptual Mobil terbang Bersayap Tetap Mohammad Adhitya; Ridho Irwansyah
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/y76aae85

Abstract

Mobil terbang adalah suatu wahana yang harus mampu beroperasi di jalan raya selayaknya mobil yang kita ketahui secara umum yang wajib memenuhi regulasi mobil raya meliputi dimensi dan hal-hal lain untuk memastikan keselamatan di jalan raya. Mobil terbang di sisi lain saat berfungsi sebagai pesawat terbang relatif tidak dibatasi dalam hal dimensi namun kinerjanya sangat dipengaruhi oleh aspek aerodinamika yang sangat dipengaruhi oleh perbandingan gaya angkat terhadap gaya berat pesawat (lift to weight ratio). Meskipun dinamakan sebagai mobil terbang, namun dari segi teknis dan tahapan desainnya, wahana ini lebih merupakan suatu pesawat terbang yang didesain sedemikian rupa agar dimensi serta sistem roda penopangnya dapat memenuhi fungsi dan regulasi dari suatu mobil. Dalam tulisan ini disampaikan suatu tahapan terstruktur dalam mendesain suatu mobil terbang yang merupakan kombinasi dari parameter-parameter penting suatu desain mobil dan pesawat terbang yang terdiri dari 8 tahapan yaitu 1. Requirements, 2. Weight estimation, 3. Critical performance parameters, 4. Configuration layout, 5. Force analysis due to CG position, 6. Better weight estimation, 7. Performance analysis, dan 8. Optimization. Hasil dari tahapan ini tentunya berupa desain mobil terbang yang dapat memenuhi fungsinya sebagai mobil yang memenuhi regulasi jalan raya dan sebagai pesawat terbang.
Co-Authors A. Azis Abdul Muis Abdurohman, Kosim Agustian, Rialdi Ardian Roekettino Ardian Roekettino, Ardian Aritonang, Rian Suari Artana, I Nyoman Asep Apriana Asep Apriana Askar Adika Agama Bayu Trianto Bayu Trianto, Bayu Budi Haryanto Budi Haryanto D. A. Sumarsono Danardono A Sumarsono Danardono Agus Sumarsomo Danardono Agus Sumarson Danardono Agus Sumarsono Dedi Junaedi Deprian, Lukyawan Pama F. A. Falah F. Arrafi F. Zainuri Faiz Akbar Pradipta Fuad Zainuri Fuad Zainuri Fuzi Rachmat Ramdhan fuzi rachmat ramdhan G. Fauzan Ghany Heryana Habibullah, Mohammad Huda, Mahfudz Al I. Choiri I. Wahyudi Jos Istiyanto Karmiadji, Djoko Wahyu Kristianto, Stevanus Brian KURNIAWAN, FAROHAJI Lukyawan Pama Deprian M. Triananda Mokhtar Muhammad Agung Santoso Muhammad Hidayat Tullah Muhammad Hidayat Tullah Muttaqie, Teguh Nur ‘Azah Pratama, Mikhael Gilang Pribadi Putra Putra, Nandy Setiadi Djaya RA. Koestoer Rahmat Noval Rahmat Noval Reza Adyanto Nugroho Ridho Dwimansyah Ridho Irwansyah Riki Ardiansyah, Riki Sepriyanto Sholahudin Stevanus Brian Kristianto Umar Abdul Aziz Utama, Agus Bayu Wandono, Fajar Ari Yulianto Sulistyo Nugroho