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All Journal Jurnal Teknik Mesin Indonesia Scientific Journal of Mechanical Engineering Kinematika METAL : Jurnal Sistem Mekanik dan Termal Jurnal Pendidikan Teknik Mesin
Sunardi
Universitas Sultan Ageng Tirtayasa
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Efek panas pada besi dan stainless steel 304 untuk penyaring udara mesin incinerator Agung Sudrajad; Muhammad Rafli Gumay Putra; Sunardi
Jurnal Teknik Mesin Indonesia Vol. 18 No. 1 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i1.417

Abstract

Particulate matter in the environment can give a bad effect to the body of human through the respiratory process. These conditions require researchers to innovate to reduce the air pollution. The electrostatic precipitator (ESP) filter system is one technology for reduce of particulate matter by the combustion of Incinerator. This system has a good efficiency and very good in reducing of particulate matter produce by Incinerator. The materials used for the ESP system air filter in this study were iron and Stainless Steel 304. The tests carried out were the corrosion rate test, and X-Ray Diffraction (XRD) where the corrosion rate of the material will be measured using the weight loss method and seen the content and elements involved. changed using XRD. The results shows that the corrosion rate test, iron has a corrosion rate decrease of 66% and Stainless Steel 304 by 73%.. The Scanning Electron Microscope (SEM) EDX results show that after heating both specimens have the same ferrite pearlite phase but for iron specimens, pearlite is more dominant, and stainless steel 304 is more dominant in ferrite. While for the XRD results, there are wave changes on the graph of the iron and stainless steel 304 specimens before and after being heated, which means that there are differences in the phase of the two specimens.
PENGARUH FRAKSI VOLUME DAN ARAH SERAT TERHADAP KETANGGUHAN IMPAK DAN KEKUATAN BENDING PADA MATERIAL KOMPOSIT SERAT TANDAN KOSONG KELAPA SAWIT Jefri Aldo; Sunardi; Mekro Permana Pinem; Jefri Aldo
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.747

Abstract

Natural fiber-based composite materials are becoming an environmentally friendly alternative that continues to be developed due to their abundant availability, light weight, and low production costs. This study aims to determine the effect of volume fraction and fiber direction on the mechanical properties of empty oil palm fruit bunch (OPEFB) fiber-based composites, particularly impact toughness and flexural strength. The composite manufacturing process was carried out experimentally using hand lay-up and compression molding methods. OPEFB fibers were used as reinforcement and polyester resin as matrix, with the addition of MEKPO catalyst at 1% of the resin volume. Composites were varied based on fiber volume fraction (20%, 30%, and 40%) and fiber direction (0°, 45°, and 90°). Impact toughness testing was carried out using the Izod method referring to ASTM D256, while flexural strength was tested using the three-point bending method (ASTM D790). The results showed that a 30% volume fraction with a 0° fiber direction produced the highest flexural strength of 95.7 MPa, while a 40% volume fraction with a 45° direction showed the highest impact toughness of 28.1 kJ/m². Increasing the fiber volume fraction above 30% decreased the flexural strength due to fiber agglomeration. The 0° fiber direction was optimal for flexure, while 45° was most effective for absorbing impact energy.
Effect of Alkali (Naoh) Treatment on the Mechanical Properties of Abaca Fiber and Nylon Ropes in Engineering Materials Learning Melda_Sari_Erawati Melda Sari; Sunardi; Hamdan Akbar Notonegoro; Mohamad Abror; Hidayat; Febri Ramadhoni Saputra; Try Nova Abellia
Jurnal Pendidikan Teknik Mesin Vol. 13 No. 1 (2026): Jurnal Pendidikan Teknik Mesin
Publisher : Program Studi Pendidikan Teknik Mesin Fakultas Keguruan dan Ilmu Pendidikan Universitas Sriwiajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jptm.v13i1.294

Abstract

This study aims to analyze the effect of NaOH alkali treatment on the mechanical properties of ropes made from abaca fiber and to compare them with nylon ropes and hybrid abaca–nylon ropes. The abaca fibers were treated using 5% NaOH solution for 4 hours and 10% NaOH solution for 2 hours at room temperature. The fibers were then twisted into three-strand ropes with a length of 80 cm. Tensile testing was conducted using a 100 kN Universal Testing Machine (UTM) at a crosshead speed of 10 mm/min. The test results showed that nylon rope exhibited the highest tensile strength, followed by hybrid abaca–nylon rope, while abaca rope showed the lowest value. The 5% NaOH treatment tended to provide better mechanical performance compared to the 10% NaOH treatment. Excessive alkali concentration caused a decrease in tensile strength due to degradation of the abaca fiber structure.This study also contributes to the field of Mechanical Engineering Education Study Program, particularly in engineering materials and material testing learning. The findings can serve as a learning reference regarding the utilization of natural fibers as environmentally friendly materials and the effect of chemical treatment on the mechanical properties of materials. In addition, this research supports the development of students’ competencies in understanding material characterization, manufacturing technology, and the application of natural fiber-based composite materials in the field of mechanical engineering.
Optimization of Hot Press Temperature and Eggshell Filler Composition in Biocomposite Fabrication Using the Taguchi Method Intan Nazwa; Sunardi; Imron Rosyadi; Deni Purnomo; Erny Listijorini
METAL: Jurnal Sistem Mekanik dan Termal Vol. 10 No. 1 (2026): METAL : Jurnal Sistem Mekanik dan Termal
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.10.1.1-7.2026

Abstract

The utilization of biomass waste as a reinforcing agent for biocomposites presents an attractive alternative in the development of environmentally friendly materials. This study aims to analyze the effect of varying percentages of chicken eggshell and crumb rubber fillers, as well as the hot press temperature, on the mechanical properties of the biocomposite, including the Modulus of Rupture (MOR), Modulus of Elasticity (MOE), and strain. The Taguchi method with an L9 orthogonal array design was employed to evaluate the effect of each factor and determine the optimum process combination. The research findings indicate that a 10% filler concentration yielded the highest stiffness, while a 20% filler concentration resulted in the largest strain value and demonstrated the best balance between strength and flexibility. A temperature of 170°C emerged as the most stable condition for most mechanical parameters, whereas a temperature of 190°C provided an increase in strength at higher filler compositions. From this study, it was ascertained that the optimal parameters are a 20% filler concentration and a temperature of 170°C (N1), yielding MOR, MOE, and strain values of 1473.53 MPa, 1186 MPa, and 2.86%, respectively. These findings affirm the critical importance of controlling the filler composition and processing parameters in producing biocomposites that are consistent and high-performing.
Co-Authors Agung Sudrajad Deni Purnomo Erny Listijorini Febri Ramadhoni Saputra Hamdan Akbar Notonegoro Hidayat Imron Rosyadi Intan Nazwa Jefri Aldo Jefri Aldo Mekro Permana Pinem Melda_Sari_Erawati Melda Sari Mohamad Abror Muhammad Rafli Gumay Putra Try Nova Abellia