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All Journal Manutech : Jurnal Teknologi Manufaktur PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Yuli Yetri
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering Physics Other

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Perhitungan Ulang Chassis Mobil Marapi Evo 1 Untuk Kontes Mobil Hemat Energi 2021 Nurul Izza; Yuli Yetri
Manutech : Jurnal Teknologi Manufaktur Vol. 15 No. 01 (2023): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v15i01.223

Abstract

In 2021 the Padang State Polytechnic Marapi team participated in an energy-efficient car contest held by PUSPRESNAS. The Marapi team participated in the diesel engine prototype category which was held at the State University of Surabaya, East Java. To keep the efficiency of the car increasing, a stable and lightweight chassis is needed. The Marapi Evo 1 uses a ladder frame type chassis with an overall length of 2000mm and hollow aluminum material. The chassis is designed to withstand a load of more than 200kg. In this journal, calculations will be carried out regarding the distribution of forces acting on the Marapi Evo 1 car chassis when accelerating. There are three testing methods, namely Finite Element Method (FEM) Testing Using ANSYS, Force Distribution Analysis, and Total Traction Analysis. From the results of the analysis and calculations that have been carried out, it can be concluded that the Marapi Evo 1 chassis is feasible and safe to compete in the 2021 Energy Saving Car Contest. In addition, a total traction force of 330.216925 N which states that the Marapi Evo 1 car is capable of maneuvering very well when there is a change of speed.
Synthesis and Characterization of TEOS-based Materials for Hydrophobic Corrosion Protection as Silica Irpansyah Siregar; Jon Affi; Yuli Yetri; Hariyati Lubis; Tengku Machdhalie Sofie
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA02

Abstract

This research prepared superhydrophobic protection based on tetraethyl orthosilicate (TEOS) as a silica substitute using the sol-gel method. The raw material involved sodium silicate, TEOS, cetyltrimethylammonium bromide (CTAB) surfactant, and trimethylammonium chloride (TMACl). Characterization techniques employed include Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (SEM-EDS), X- Ray Fluorescence (XRF), and X-Ray Diffraction (XRD). According to the XRD analysis, a characteristic diffraction peak of silica was observed at 2θ = 31.680°. The SEM results revealed a uniform surface morphology, attributed to the homogeneous grinding process during sample preparation. The EDS investigation exhibited the elemental compositions of Si, Fe, O, Cl, and C. The XRF analysis confirmed the presence of silicon (Si), originating from TEOS, which was used as the silica source. The water contact angle test shows sample with 10% TEOS has highest angles as 50. 56 degree.
Co-Authors Hariyati Lubis Irpansyah Siregar Jon Affi, Jon Nurul Izza Tengku Machdhalie Sofie