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Rizal Mahmud
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Institut Teknologi Adhi Tama Surabaya Jl. Arief Rahman Hakim No. 100, Surabaya, East Java, Indonesia 60117
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Journal of Mechanical Engineering, Science, and Innovation
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 2776933X     EISSN : 27763536     DOI : https://doi.org/10.31284/j.jmesi
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Mechanical Engineering
Journal of Mechanical Engineering, Science, and Innovation (JMESI) is a peer-reviewed journal in English published two issues per year (in April and October). JMESI dedicated to publishing quality and innovative research in the field of mechanical engineering and science, thereby promoting applications to engineering problem. It encompasses the engineering of energy, mechanical, materials, and manufacturing, but it is not limited to scopes. Those are allowed to discuss on the following scope: Energy: Energy Conversion, Energy Conservation, Renewable Energy, Energy Technology, Energy Management. Mechanical: Applied Mechanics, Automobiles and Automotive Engineering, Tribology, Biomechanics, Dynamic and Vibration, Mechanical System Design, Mechatronics. Material: Material Science, Composite and Smart Material, Micro and Nano Engineering, Powder Metallurgy. Manufacturing: Advanced Manufacturing Techniques, Automation in Manufacturing, Modelling, and Optimization of Manufacturing Processes.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 73 Documents
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Mechanical Strength Analysis of Bamboo Fiber and Glass Powder Reinforced Composites Using Epoxy Matrix as an Alternative Visor Al. Aziz. R, M. Shafwallah; Faizin, Kholis Nur; Gascoin, Nicolas; Fakhrudi, Yoga Ahdiat; Kurniawan, Pradhana
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 2 (2025): (October)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i2.8162

Abstract

This study aims to analyze the mechanical strength of composites with bamboo fiber and glass powder reinforcement using an epoxy matrix. The study used a hand lay-up method with three variations of volume fraction composition, namely (1) 15% bamboo fiber, 15% glass powder, 70% resin, (2) 20% bamboo fiber, 10% glass powder, 70% resin, and (3) 25% bamboo fiber, 5% glass powder, 70% resin. The bamboo fiber used was the result of alkali treatment using 15% NaOH solution to remove lignin and cellulose, while the glass powder was obtained from household glass waste with a particle size of 60 mesh. Mechanical property testing included tensile testing (ASTM D638 Type 1), compression testing (ASTM D695-96), and impact testing (ASTM D256), while morphological structure analysis was carried out using Scanning Electron Microscope (SEM) testing. The results showed that the volume fraction composition of 25:5:70 produced the highest tensile strength with an average value of 95.69 N/mm² and the highest impact strength of 29.91 J/mm. Meanwhile, the composition of 15:15:70 obtained the highest compressive strength of 57.13 MPa. SEM analysis of the composite fracture showed the occurrence of full out fiber, debonding, and void phenomena in the matrix, which affected the decrease in the material strength value. This indicates that variations in the composition of bamboo fiber and glass powder can optimize the mechanical properties of composites, while supporting the utilization of natural materials and waste as environmentally friendly innovation materials for automotive applications, especially Yamaha Vixion motorcycle visor products.
Analysis of Surface Defects on RAM BOP with Non-Destructive Testing and Crack Propagation Simulation to Detect Potential Crack Development Wibowo, Fadhil; Andoko, Andoko; Zakaria, Yahya
Journal of Mechanical Engineering, Science, and Innovation Vol 6, No 1 (2026): (April)(On Progress)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2026.v6i1.8286

Abstract

Blowout Preventers (BOPs) are critical safety devices in drilling operations and operate in abrasive, high‑pressure environments that accelerate wear and failure. This study applies two Non‑Destructive Testing (NDT) methods, Liquid Penetrant Testing (LPT) and Magnetic Particle Testing (MPT), to identify surface defects on RAM BOP components, and integrates finite‑element‑based crack propagation simulation to assess the risk of further damage. LPT was applied to coated/non‑ferromagnetic parts, while MPT was used for ferromagnetic components, referencing ASME Section V acceptance criteria. Inspections revealed defects including a 4.9 mm crack on the piston shaft and pitting corrosion (≈0.8-5.3 mm) on several parts (e.g., cavity upper, housing). The simulation, with 3000 psi operating pressure and an initial flaw (l = 3 mm; h = 1 mm; r = 0.6 mm), predicted stress concentration at the crack tip (up to ~141 MPa) and potential growth toward ~7.9-11.7 mm if unrepaired. Recommended actions include re‑welding cracked regions and polishing minor scratches/pitting, combined with periodic NDT for early detection. The integrated NDT-simulation workflow supports proactive maintenance, enhances operational safety, and mitigates failure risk.
Effect of Cylinder Rotation Speed on Corn Drying Characteristics in a Rotary Dryer Habibi, Muhammad Al Fatih; Sutanto, Rudy; Wirawan, Made
Journal of Mechanical Engineering, Science, and Innovation Vol 6, No 1 (2026): (April)(On Progress)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2026.v6i1.8620

Abstract

Corn has a high post-harvest moisture content (20-40%), making drying very important to maintain quality and extend shelf life. This study investigated the effect of drum rotation speed in a rotary dryer on the drying characteristics of corn and compared it with solar drying. The drying method was carried out using an LPG-fueled rotary dryer with an inlet air temperature of 70°C and an air flow velocity of 7.9 m/s. The drum rotation speed was varied at 6 rpm, 9 rpm, and 12 rpm with an initial corn mass of 5 kg. Drying was carried out for 6 hours. And data collection was carried out every 30 minutes during the drying process. As a result, a higher drum rotation speed significantly increased the drying rate. A speed of 12 rpm showed the best performance with a maximum drying rate of 0.46 kg/hour and an average of 0.24 kg/hour. However, the highest energy efficiency was obtained at a speed of 6 rpm, indicating that lower speeds require less energy despite longer drying times. Overall, the rotary dryer performed better than solar drying in reducing corn moisture content more quickly, stably, and controlled in a shorter time

Page 8 of 8 | Total Record : 73

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