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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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Technical and Economic Study of Fast Charging Systems Electric Heavy Equipment in Industrial and Port Areas Rahmat Noval; Asep Apriana; Danardono Agus Sumarsono; Dedi Junaedi; Fuad Zainuri; Mohammad Adhitya; Muhammad Hidayat Tullah; Fuzi Rachmat Ramdhan
Recent in Engineering Science and Technology Vol. 4 No. 1 (2026): RiESTech Vol. 4 No. 1 Years 2026
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v4i01.143

Abstract

The electrification of heavy equipment presents both an opportunity and a challenge for Indonesia’s industrial and port operations. Despite advancements in battery energy density and power electronics, the lack of efficient fast-charging infrastructure remains a critical bottleneck. This study evaluates the technical and economic feasibility of implementing high-power DC fast-charging systems for electric heavy machinery in port and industrial settings. Using HOMER Grid and MATLAB-based simulations, three charging configurations (90 kW AC, 250 kW DC, and 500 kW dual-gun DC) were analyzed. Results indicate that the 500 kW system reduces downtime by up to 70%, increasing equipment availability from 75% to 96%. Economic analysis shows a payback period of 4.8 years, internal rate of return (IRR) of 18.7%, and levelized cost of electricity (LCOE) of IDR 2,100/kWh. The findings support the deployment of modular fast-charging hubs to accelerate electrification in logistics and port sectors
Experimental study on a new prototype design of electric bus vehicle structure under torsion loading conditions Haryanto, Budi; Sumarsono, Danardono Agus; Karmiadji, Djoko Wahyu; Adhitya, Mohammad; Kristianto, Stevanus Brian; Deprian, Lukyawan Pama
Mechanical Engineering for Society and Industry Vol. 5 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.13559

Abstract

Vehicles commonly encounter uneven road conditions, which can lead to torsional deformation of the frame structure. The results of finite element analysis (FEA) indicate that the highest stress occurs under torsion loading conditions. To validate these simulation results, an experimental study was conducted involving static load testing under torsional loading conditions on a hybrid frame structure, composed of SS 400 carbon steel and 6061 aluminum alloy, designed for a 70-passenger electric bus. The test was performed by applying a static load of 6,825 kg as sandbags on the seating area and aisle, and supporting the frame on three wheels only. Strain measurements were recorded using 28 strain gauges: 20 on the SS 400 carbon steel underframe and 8 on the 6061 aluminum alloy structure of the side and roof frames. The total load was the weight of 70 passengers plus a 30% dynamic load factor. Experimental analysis revealed a maximum stress value of 76.42 MPa in the SS 400 carbon steel of the underframe at location 9 in the central section of the underframe. In the 6061 aluminum alloy structure, the maximum stress value of 15.56 MPa was obtained in the roof frame directly below the air conditioner unit. Overall, the measured stress values were within the elastic ranges of the materials used, demonstrating structural integrity under load. The average difference between the experimental results for stress and the finite element analysis (FEA) simulation was approximately 11.21%.
Crashworthiness of Thin-Walled Structures: Influence of Materials, Geometry, Manufacturing Processes and Loading Conditions Ardiansyah, Riki; Istiyanto, Jos; Adhitya, Mohammad; Muttaqie, Teguh
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.16034

Abstract

Crashworthiness is a critical requirement for lightweight structures in automotive, electric vehicle and aerospace applications, where efficient energy absorption and controlled force transmission are essential. This review looks at more than 100 experimental, numerical, and analytical studies published between 2013 and 2025. It focuses on how materials, geometry, manufacturing processes, and loading conditions work together to affect the crashworthiness of thin-walled structures. Using a PRISMA inspired systematic narrative review combined with bibliometric and thematic analyses, key performance metrics: peak crushing force (PCF), mean crushing force (MCF), energy absorption (EA), specific energy absorption (SEA) and crushing force efficiency (CFE) are evaluated across metals, polymers, composites and hybrid systems, as well as non-tapered, tapered geometries under quasi-static and dynamic loading. The reviewed studies show that crashworthiness is best improved through a good combination of material, geometry, manufacturing quality and loading conditions. Hybrid structures are particularly promising, but their performance depends heavily on the interface quality, shape, and testing conditions.
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.
Dynamometer Testing of Electric Vehicles: Methods, Standards, and Emerging Trends Rahmat Noval; Asep Apriana; Danardono Agus Sumarson; Ghany Heryana; Fuad Zainuri; Mohammad Adhitya; Muhammad Hidayat Tullah; Fuzi Rachmat Ramdhan
Recent in Engineering Science and Technology Vol. 4 No. 3 (2026): RiESTech Vol. 4 No. 3 Years 2026
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v4i3.133

Abstract

Dynamometer testing (dynotest) is essential for evaluating electric vehicle (EV) performance under controlled laboratory conditions, enabling repeatable measurement of power, torque, efficiency, and energy consumption while emulating real-world driving cycles. This review surveys recent developments in EV dynotesting, highlighting IEEE and international test standards, key performance parameters, and evolving methodologies. We compare chassis and hub dyno architectures, including new “vehicle-in-the-loop” and modular test benches, and discuss integration of hardware-in-the-loop (HIL) simulation for real-time controller validation. Standardized drive cycles (e.g. WLTP, EPA/UDDS, JC08) are widely used on dynos to benchmark EV energy use. We summarize representative studies that apply dynotests to EV powertrains, including single-motor and dual-/multi-motor drivetrains. Emerging challenges are reviewed: bidirectional (regen) energy flow, thermal management under high load, synchronization of multiple drive units and batteries, and specialized needs for all-wheel-drive (AWD) and multi-motor EV testing. The review concludes that comprehensive dynotest methods, combined with rigorous standards, HIL integration, and advanced data analysis, are critical for validating next-generation EV drivetrains and enabling accurate energy-consumption benchmarking. Future work should address remaining gaps in multi-axis dyno platforms, long-term durability tests, and AI-driven real-time analysis during dyno runs.
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