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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Jurnal Teknik Pengairan: Journal of Water Resources Engineering Conference SENATIK STT Adisutjipto Yogyakarta Jurnal Surya Masyarakat Unri Conference Series: Community Engagement International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Dulang: Jurnal Pengabdian Kepada Masyarakat Advance Sustainable Science, Engineering and Technology (ASSET)
Putu Hadi Setyarini
Mechanical Engineering Department, Brawijaya University
Aerospace Engineering Humanities Automotive Engineering Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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EFFECT OF PENETRATION POSITIONS BULLETS ON A PERFORATED PLATE AGAINST BALLISTIC RESISTANCE OF FIBER METAL LAMINATE (FML) Fadly, Muhammad Syaiful; Purnowidodo, Anindito; Setyarini, Putu Hadi; Mustafa, Mustafa; Hamzah, Muhammad Sadat
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.3

Abstract

This study aims to examine the phenomena that occur due to projectile penetration on fiber metal laminate. Ballistic testing was carried out experimentally according to National Institute of Justice standards (NIJ Standard 0101.06 level III-A) using a 9 mm full-metal jacket projectile with a normal angle of attack (90° to the target). The results showed that fiber metal laminate could withstand the projectile rate by penetrating the first layer (aluminum plate) and the second layer (aramid/epoxy), while the last layer was deformed to form a bulge. The pierced aluminum plate is characterized by petalling failure. Meanwhile, the aramid/epoxy was penetrated by the projectile with failure of the primary yarn to break the fiber.
EXPERIMENTAL STUDY OF MECHANICAL PROPERTIES AND CORROSION RATE OF LOW CARBON STEEL AISI 1020 RESULTING FROM LOW PRESSURE GAS CARBURIZING Audrey, Reinaldo Evan; Setyarini, Putu Hadi; Sugiarto, Sugiarto; Sholikin, Atfalus
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 2 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.02.6

Abstract

Within the realm of demanding marine operations, tugboat chain sprockets have a vital function in guiding and controlling giant ships. Marine conditions provide considerable obstacles for chain sprockets, which are commonly constructed from low-carbon steel for their cost-effectiveness and mechanical appropriateness. One such problem is corrosion, which can result in material failure. AISI 1020, a low-carbon steel containing around 0.2% carbon, provides exceptional toughness and resistance to corrosion, especially for applications in mining and oil platforms. The poor corrosion resistance of the material, worsened by exposure to air and salt in saltwater, requires a remedy. In order to enhance wear and corrosion resistance, low-pressure gas carburizing (LPGC) is suggested as a method to augment surface hardness and establish a durable oxide layer. This approach provides benefits in managing carbon penetration with less distortion and environmental effect as compared to conventional carburizing methods. Evidence indicates that low-pressure carburizing increases the flow of hydrocarbon gas, which in turn promotes even diffusion of carbon, thereby enhancing the distribution of hardness. The work explores the efficacy of LPGC in improving the operating longevity and efficiency of chain sprockets in marine environments. Its objective is to investigate how carbon augmentation via LPGC changes the steel microstructure, enhances corrosion resistance, and increases tensile strength. Materials utilized were AISI 1020 low-carbon steel plates. They were treated by regulating temperature fluctuations and specific durations of holding. Subsequently, the plates underwent measurements of Micro-Vickers hardness, tensile strength, SEM-EDX analysis, and corrosion using a Tafel Extrapolation. Results indicate a substantial rise in hardness in carburized specimens, with the best result achieved at 950°C for 60 minutes. According to the study, LPGC successfully enhances the mechanical and anti-corrosive characteristics, therefore prolonging the lifespan of nautical components and maximizing their performance under demanding circumstances.
Comparative Efficacy of Two Bamboo-Derived Activated Carbons for Hospital Wastewater Remediation Setyarini, Putu Hadi; Pembayun, Hanum Surya; Sulistyarini, Dwi Hadi; Purwaningtyas, Nuretha Hevy; Dewi, Francisca Gayuh Utami
Advance Sustainable Science Engineering and Technology Vol. 7 No. 3 (2025): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i3.1895

Abstract

Liquid medical waste containing pathogens and hazardous chemicals can pollute the environment and endanger human health. The increasing volume of waste during the COVID-19 pandemic adds urgency to find effective and sustainable treatment methods. However, environmentally friendly and efficient solutions are still limited. This study aims to explore the utilization of activated carbon from two local bamboo species, Gigantochloa apus (GA) and Bambusa vulgaris (BV) as alternative adsorbents in the treatment of liquid medical waste. Two-year-old bamboo was traditionally carbonized and activated using 0.3 M sodium chloride solution. The 50 mesh charcoal powder was tested using BET surface area analysis with QUADRASORB evo™ instrument, morphology using FESEM (FEI Quanta 650), and pollutant reduction efficiency through pH, TDS (HAIK EZ 9909), COD (HACH DBR 200 closed reflux method), and BOD (Winkler method with BOD 6 VELP system) measurements. The results showed that GA activated carbon exhibited a much higher adsorption capacity due to its larger BET surface area compared to BV. In addition, pH and Total Dissolved Solids (TDS) analysis showed that wastewater treated with GA activated carbon exhibited a greater reduction in TDS levels. The study also evaluated the reduction of Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD), which confirmed that GA provided higher pollutant removal efficiency than BV. These findings underscore the potential of GA and BV as effective adsorbents for medical wastewater treatment, offering a sustainable solution to improve water quality and reduce environmental impacts associated with liquid medical waste.
Co-Authors A.A. Ketut Agung Cahyawan W Amanda Nur Cahyawati Anam, M. Khairul Anindito Purnowidodo Anshori, Mohammad Audrey, Reinaldo Evan Bakri Bakri Darmadi, Djarot Bangun Dewi, Francisca Gayuh Utami Dhanang Suryo Prayogo Diana Aisyah Dina Novera Serfandi Djoko Sutikno Dwi Hadi Sulistyarini Dwi Hadi Sulistyarini Erwin Sulistyo Fachrezi, M. Qashmal Fariqi, Ikhwan Hafiz Femiana Gapsari MF Fikrul Akbar Alamsyah Firdaus Nur Dwi Fahmi Fitriani, Siti Noor Harjo, Apollo Ode Rea Hery Widijanto I Wayan Gede Suputra Wardiana Iksandy, Jemmie Inayati, Dian Mochammad Roviq Mochammad Roviq Muhammad Sadat Hamzah Muhammad Syaiful Fadly Muhammad Syaiful Fadly Muhammad Wahyudi Naafila, Amira Nuretha Hevy Purwaningtyas Pembayun, Hanum Surya Purnami Purnami Rudianto Raharjo Serfandi, Dina Novera Sholikin, Atfalus Sisca Fajriani Sisca Fajriani Sonief, Achmad As'ad Sonief, Achmad As’ad Sri Chandrabakty Sugiarto S Sugiarto Sugiarto Sulistyono Sulistyono Sulistyono Sulistyono Syarif Hidayatullah Teguh Dwi Widodo Tri Nurwati Wiwik Handayani Yoni Sudana