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All Journal IAES International Journal of Artificial Intelligence (IJ-AI) Rekayasa Mesin JURNAL PASTI (PENELITIAN DAN APLIKASI SISTEM DAN TEKNIK INDUSTRI) Sinergi VANOS Journal of Mechanical Engineering Education Jurnal Teknik Mesin Science and Technology Indonesia Dinamisia: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdi Masyarakat (JAM) Indonesian Journal for Social Responsibility International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) International Journal of Community Service Jurnal Abdimas ADPI Sains dan Teknologi Jurnal Rekayasa Energi dan Mekanika International Journal of Innovation in Mechanical Engineering and Advanced Materials Innovative: Journal Of Social Science Research AME (Aplikasi Mekanika dan Energi) : Jurnal Ilmiah Teknik Mesin Jurnal Polimesin
Dafit Feriyanto
Universitas Mercu Buana
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Design optimization and material selection of automotive bushing arms using FEA under acidic exposure Ana Nur Oktaviani; Dafit Feriyanto; Haftirman Haftirman; Supaat Zakaria; Dedik Romahadi; Hadi Pranoto; SS Abdulmalik
Jurnal Polimesin Vol 24, No 3 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i3.8444

Abstract

Bushing arms are critical automotive components that function as vibration dampers and load absorbers. The problem is that the bushing arm often fails due to several factors, including the use of inappropriate materials, poor road quality, lack of routine maintenance, and external factors such as extreme temperatures, exposure to corrosion, and excessive pressure. This study aims to optimize bushing arm design and material selection to improve durability and vibration-damping performance under acidic exposure conditions. Two rubber materials, Natural Rubber (NR) and Ethylene-Propylene Diene Monomer (EPDM), were evaluated for MPV-type vehicle bushing arms. Three design variations were developed and analyzed using hyperelastic Finite Element Analysis (FEA) to assess stress distribution, strain, deformation, and safety factor. The rubber specimens were fabricated by hot pressing at 180°C and 7 MPa, followed by immersion in 15% phosphoric acid at 65°C to evaluate chemical degradation. Mechanical characterization included tensile testing (ASTM D412), Shore hardness testing, and microstructural observation. The results showed that acid immersion reduced tensile strength by 20.44% for NR and 23.80% for EPDM, while elongation decreased by 38.3% and 17.43%, respectively. Hardness decreased by 19.2% for NR and 4.81% for EPDM. FEA results indicated that design C achieved the lowest deformation, reducing it by 51%, while design B reduced shear stress and von Mises stress by up to 70%. Based on the combined mechanical and simulation results, design B with NR material was selected as the preferred configuration.
Compound development as a protective layer on fecral substrate by a combination of γ-Al2O3 ultrasonic and NiO electroplating techniques to improve thermal stability Imam Hidayat; Dafit Feriyanto; Supaat Zakaria; SS. Abdulmalik; Nurato Nurato; Dedik Romahadi
SINERGI Vol. 30 No. 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.003

Abstract

One of the most technologically advanced methods for developing and adhering catalysts to the FeCrAl substrate is electrophoretic deposition. However, it faces a problem: low thermal stability at high temperatures of 10000 °C, caused by a lack of a protective oxide layer. The goal of this study is to investigate the protective oxide layers formed by Al2O3 and NiO coatings on FeCrAl metallic material for catalytic converters (CATCO). The electrolyte was prepared with distilled water at a constant temperature of 40±50 °C. The pH was adjusted to 5 with HCl and NaOH reagents. The electrolyte was prepared at 40 ± 50 °C and stirred for 1 minute using a magnetic stirrer. A 50mm x 10mm Ni plate substrate served as the anode, while a 40mm x 20mm FeCrAl cathode was used. The spacing between the anode and cathode was set at 25mm. The electroplating was conducted for several variation times of 15, 30, 45, 60 and 75 minutes, current density of 8 A/dm2, 3g γ-Al2O3 was inserted into the beaker for each sample and the total surface area was 1600mm2 on both sides. Drying was performed after electroplating at 600 °C for 12 hours.  Raman spectroscopy revealed that several compounds observed during the experimental stages, such as FeCrAl, γ-Al2O3, NiO, NaO2, NiAl2O4, NiCr2O4, and FeCr2O3, were also present in the coated FeCrAl CATCO, with distinct peaks. Therefore, it can be concluded that the UB+EL 30 min successfully deposited the γ-Al2O3 and NiO on the FeCrAl substrate after CATCO fabrication.
Activated carbon air filter and rubber seed oil approach from waste rubber seed shell for alternative fuel and improving air quality Dafit Feriyanto; Supaat Zakaria; Alfian Noviyanto; Nurato Nurato; Dedik Romahadi; Hadi Pranoto; Samir Sani Abdulmalik
SINERGI Vol. 30 No. 2 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.2.015

Abstract

Research related to rubber seed conversion to oil and activated carbon as filter media requires further exploration. Therefore, the main objective of this study to investigate the rubber seed oil as alternative energy and rubber seed Shell Activated Carbon (RSSAC). Thermo-chemical method conducted with separation process between the kernel and the shell. The process used temperatures of 550 and 600°C. Biodiesel was produced by a blending process using a frequency of 20kHz, temperature of 60oC and 2h holding time. In addition, the side product was converted into activated carbon through carbonization and activation using KOH. Air filter fabricated using three layers, where the top and bottom layers being non-woven and RSSAC in the middle. It compacted using hot-press method at temperature of 150°C for 60 s to produce an air filter media thickness of 3–5mm. The results show that there are several high compound concentrations i.e. CH4, aldehydes, and ketonestone. Several gases evolve, such as CO2, CO, CH4, H2O, ketone aldehyde, and HC. Microstructure analysis using Scanning Electron Microscope (SEM) of RSSAC shows that element C significantly increase up to 80%, while O, K, and Ca decreased up to 72%, 66% and 90%, respectively. RSSAC has a large surface area of 175.95m2/g, and it will have high effectiveness in improving indoor air quality (IAQ). This is indicated by the result of IAQ analysis where the humidity, temperature, CO, CO2, TVOC, and PM10 were lower than the acceptable limit of 70%, 27oC, 1000ppm, 10ppm, 3 ppm, and 0.15 mg/m3, respectively.
Sustainable Biodiesel Production from Waste Cooking Oil and Crude Palm Oil Using a Custom Mini Pilot Plant Alan Ooi Lim Siang; Abdul Mutalib Leman; Dafit Feriyanto; Samir Sani Abdulmalik; Supaat Zakaria
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol. 6 No. 1 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i1.23734

Abstract

The widespread practice of reusing Waste Cooking Oil (WCO) in hawker food stalls, often for multiple frying cycles, presents a significant public health concern due to the degradation of the oil, which can lead to the formation of toxic compounds. These practices not only pose health risks, such as increasing the potential for cardiovascular diseases and cancer, but also contribute to environmental pollution when the oil is improperly disposed of. This study seeks to address these issues by converting WCO, along with crude palm oil (CPO), into biodiesel using a custom-designed mini pilot plant. The biodiesel production process involved a two-step reaction. The first step, esterification, was conducted using a 55:100 alcohol-to-oil volume ratio with 1% by volume sulfuric acid (H₂SO₄) as the acid catalyst, at 60°C, with a reaction time of 30 minutes and a stirring speed of 800 rpm. The second step, transesterification, utilized a 6:1 alcohol-to-oil molar ratio, with 1 wt.% sodium hydroxide (NaOH) as the alkaline catalyst, carried out at 70°C over the course of one hour. These conditions were carefully selected to optimize the conversion efficiency and to minimize the free fatty acid content, which is crucial for achieving a high yield of biodiesel. The results demonstrated that the mini pilot plant is highly effective in producing biodiesel from both WCO and CPO. The study also led to the development of a standard operating procedure (SOP) for the biodiesel production process, ensuring reproducibility and efficiency.
GREEN TECHNOLOGY FOR SUSTAINABLE AGRICULTURE: BIO-FERTILIZER PRODUCTION FROM MUNICIPAL WASTE TO PRESERVE THE ENVIRONMENT Muhamad Afifi Muhamad Sidik; Abdul Mutalib Leman; Dafit Feriyanto; Samir Sani Abdulmalik; Supaat Zakaria
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol. 5 No. 3 (2023)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v5i3.23743

Abstract

This study addresses the pressing issue of municipal waste (MW) management by proposing an innovative approach to transform residential solid waste into a valuable resource using green technology. MW, sourced from diverse sectors, undergoes various disposal methods, including incineration, recycling, and landfilling. In Malaysia, the composition of MW aligns with global trends, with food waste and plastic being the predominant categories. This research focuses on producing fertilizer from residential solid waste through a green technology process, utilizing a sequential procedure involving high pressure, high temperature, and energized water to de-polymerize hemicellulose and lignin, followed by microbial enzymatic fermentation. The developed green technology introduces a novel apparatus designed for treating MW in a high-temperature, low-pressure rotating vessel using indirect heating with thermal fluid. The experimental protocol involves four batches of MW samples, evaluating the mass differential before and after the treatment process. Furthermore, a 7-week observation period assesses chili plant growth as an indicator of fertilizer effectiveness. Results indicate a significant 71% mass reduction of MW, amounting to 201.26 kg, emphasizing the efficacy of the developed process. The investigation extends to plant height, comparing MW-derived fertilizer with commercial fertilizer over a 5-week period. Remarkably, chili plants fertilized with MW-derived fertilizer exhibit a greater height of 8.6 cm, surpassing the 7.3 cm observed with commercial fertilizer. This study concludes that MW-derived fertilizer is highly recommended for enhancing plant growth and health in Malaysia, suggesting a sustainable production system. The research not only contributes to waste management but also aligns with broader goals of promoting environmentally conscious and sustainable agricultural practices, emphasizing the potential of green technology in addressing the challenges of municipal waste.
Study of Eigenvalues and Matrix Eigenvectors Using MATLAB: Vibration Systems of Multi-Purpose Vehicle (MPV) Ana Nur Octaviani; Deni Shidqi Khaerudini; Dafit Feriyanto; Gerald Ensang Timuda; Nono Darsono; Nuwong Chollacoop
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol. 6 No. 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i3.25351

Abstract

Vehicle vibration is a critical factor influencing both passenger comfort and vehicle performance. In this study, we analyze the multi-degree-of-freedom (MDOF) vibrational behavior of a multi-purpose vehicle (MPV) using matrix eigenvalue and eigenvector methods. The vehicle’s dynamics are modeled by developing a set of equations of motion that account for the forces acting on the front and rear tires, car body, and pitch angle. MATLAB is utilized to numerically compute the system’s eigenvalues and eigenvectors, representing the natural frequencies and vibration modes of the vehicle, respectively. The analysis focuses on the vehicle’s response to a 50 mm displacement at the front tire, simulating the effect of road disturbances. The resulting vibrations in the front and rear tires, car body, and vehicle pitch are illustrated over a 1-second time frame. The findings show that the front tire experiences the largest oscillation amplitude of ±1 mm, while the rear tire exhibits a much smaller displacement of ±0.04 mm. The overall car body displacement reaches a maximum amplitude of ±1.3 mm, indicating partial damping of the front tire vibrations. However, the results reveal that the vehicle’s suspension system lacks effective damping, as the vibrations do not decrease over time. This behavior could negatively impact ride comfort and safety, particularly on uneven roads. The study concludes that improvements to the vehicle’s suspension system are necessary to enhance damping performance. The presented MATLAB-based approach offers a valuable tool for analyzing and optimizing vehicle vibration systems.
NiO ELECTRO-DEPOSITION TECHNIQUE OF γ-Al2O3 WASHCOAT ON FeCrAl SUBSTRATE BY USING SULPHAMATE TYPE SOLUTION Dafit Feriyanto; A. M. Leman; Andi Firdaus Sudarma; Dedik Romahadi; Hadi Pranoto
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol. 4 No. 1 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v4i1.15763

Abstract

Electro-deposition process to develop surface layer on the substrate material in Catalytic converter (CATCO) become interesting area due to that process was purposed to improve the physical properties of substrate material. Currently, precious metals such as Platinum (Pt), Palladium (Pd), and Rodium (Rd) were used due to excellent oxidation resistant but it limited and easily oxidized. Therefore, Nickel Oxide (NiO) catalyst used as electro-deposition material. NiO electro-deposition technique that called by EL was conducted by using NiO as cathode and FeCrAl as substrate and -Al2O3 as washcoat material. This technique was performed by  variation times of 15, 30, 45, 60 and 75 minutes, current density of 8 A/dm2. The results shows that Coating layer of NiO and  -Al2O3 has been developed on surface of FeCrAl substrate. The coating layer was increase the surface roughness which showed by surface morphology data that coated FeCrAl substrate has uneven surface and some particles has been embedded on that surface. The composition of raw material was consists of Fe for 74.13wt%,  Cr of 20.25 wt% and Al of 5.62 wt%. Meanwhile, for composition of EL samples was 52.56- 63.54wt% for Fe element, Al for 3.56-11.89 wt%, Cr for 14.97-18.56 wt%, O for 2.47-11.78 wt%, C for 8.33-11.85 wt%, Na for 0.11-0.48 wt%  and Ni for 0.17- 1.58 wt%.  Higher elements of the EL samples potential to improve the thermal stability at high temperature due to CATCO operate at high temperature of 600-8500C and in extreme condition.
Influence of bonding compression and air gap on the acoustic absorption of spunbond–resinated felt composites Hasan Basri; Dafit Feriyanto
Jurnal Polimesin Vol 23, No 6 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i6.7954

Abstract

Spunbond-resinated felt is a common composite material used for automotive purposes. Reducing vehicle noise requires lightweight, cost-effective sound-absorbing materials. This study focuses on researching more lightweight and low-cost materials through examining how bonding compression and an air gap affect the acoustic absorption of Spunbond–Resinated felt composites with varying grammage (800–1400 g/m²) and thickness (15–22 mm). The novelty of this research is in the use of lower grammage and the existence of an air gap compared with the existing product and previous study. Acoustic absorption tests were conducted using an impedance tube with air-gap depths of 0, 10, and 15 mm behind the samples. Additional tests were conducted on compressed samples, 50% of the original thickness, to observe the effect of increased density. Results show that felt with 1200 g/m² provides the best overall absorption. Thickness compression reduces absorption by approximately 13–23%, whereas the introduction of an air gap significantly enhances absorption, particularly for lower-grammage materials. Notably, an 800 g/m² felt combined with a 15 mm air gap outperformed a 1400 g/m² felt without an air gap. These findings demonstrate that appropriate grammage and air gap design can enhance sound absorption, enabling lighter materials such as 800–1000 g/m² felt to meet noise-reduction requirements.
Socialization Of Waste To Energy Transformation: Innovation And Future Opportunities In Penang Island I G. Ayu Arwati; Nurato Nurato; Dafit Feriyanto; Imam Hidayat; Muhammad Fitri; Hadi Pranoto; Sagir Alva; Dianta Ginting; Nanang Ruhyat; Alvian Noviyanto
International Journal Of Community Service Vol. 5 No. 3 (2025): August 2025 (Indonesia - Rusia - Malaysia)
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijcs.v5i3.872

Abstract

Effective waste management is a major challenge in the modern era, especially with the increasing volume of waste produced by society. Transforming waste into energy offers an innovative solution that not only reduces environmental impact but also opens up economic and social opportunities. Through technologies such as biogas, incineration, pyrolysis, and gasification, waste can be converted into sustainable renewable energy sources. This socialization aims to increase public and stakeholder awareness of the importance of innovative waste management and its benefits for the environment and future economy.By understanding the technology, opportunities, and challenges that exist, it is hoped that the community and government can play an active role in supporting the mission towards more environmentally friendly waste management and reducing carbon emissions.
Co-Authors A. M. Leman A.N. Aizat Ahmad A.N. Aizat Ahmad, A.N. Aizat Abda Abda Abdi Wahab Abdul Mutalib Leman Abdul Mutalib Leman Abdulmalik, Samir Sani Abdulmalik, SS. Adinarto, Tri Wahyu Agung Wahyudi Biantoro Alan Ooi Lim Siang Albert Phak Jie Wong Alfian Noviyanto Alvian Noviyanto Ana Nur Octaviani Ana Nur Oktaviani Andi Adriansyah Andi Firdaus Sudarma Anggara, Fajar Annisa Hakim Zamzami Asep Setia Kristanto Chollacoop, Nuwong Damar, Stenlly Darwin Sebayang Dedik Romahadi Deni Shidqi Khaerudini Dewi Kusuma Arti Dian Primanita Oktasari Dianta Ginting Dianta Ginting Dwilestari, Charisma Elly Yuliawati Erna Setiany Feleke, Aberham Genetu Firmansyah, Mohamad Ardy Fransisca Listyaningsih Utami Gerald Ensang Timuda Gerald Ensang Timuda Gian Villany Golwa Hadi Pranoto Hadi Pranoto Hadi Pranoto Hadi Pranoto Hafidz IH, Muhammad Haftirman, Haftirman Hari Setiyawati Hasan Basri Himma Firdaus I G. Ayu Arwati I Gusti Ayu Arwati Imam Hidayat Imam Hidayat istiqomah istiqomah Julpri Andika KHUZAIMAH Kurniawan Kurniawan Leman, Abdul Mutalib Listyaningsih, Fransiska M. Azizi Mashadi Mashadi Mohamad Abror Muhamad Afifi Muhamad Sidik Muhamad Fitri Muhammad Fitri Muhammad Imran Muthia Rahayu Nanang Ruhyat Nono Darsono Nono Darsono, Nono Nur, Hery Nurato Nurato Nurato NURUL HIDAYAH Nuwong Chollacoop Octaviani, Ana Nur Pradipta, Nanang K. Pratiwi, Riri R Dwi Pudji Susilo Rachmanu, Fatkur Radityan, Fatwa Tresna Raflan Rajendra, Fajar Cahyadi Ramadhan, Kurnia Resista Vikaliana Rizki Briandana S.S. Abdulmalik S.S. Abdulmalik Sagir Alva Sagir Alva Samir Sani Abdulmalik Samir Sani Abdulmalik Siang, Alan Ooi Lim Sidik, Muhamad Afifi Muhamad SS Abdulmalik SS. Abdulmalik Sulaiman Hj. Hasan Sulaiman Hj. Hasan, Sulaiman Hj. Supaat Zakaria Supaat Zakaria Supaat Zakaria Supaat Zakaria Supaat Zakaria Supaat Zakaria Supaat Zakaria Supaat Zakaria Tarigan, Kontan Wang Dong Wijaya, Fathoni Putra Yananto Mihadi Putra Yuliarty, Popi Zaenudin Zaenudin Zakaria, Supaat Zakaria, Supaat