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All Journal Rekayasa Mesin Takuana: Jurnal Pendidikan, Sains, dan Humaniora Jurnal Polimesin
Rismanto, Muhammad
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Arts Humanities Automotive Engineering Control & Systems Engineering Education Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Optimasi Parameter Desain Multi-Cell Hexagonal Crash Box terhadap Absorbsi Energy Impact dengan Metode Taguchi Rismanto, Muhammad; Choiron, Moch. Agus; Sugiono, Sugiono
Jurnal Rekayasa Mesin Vol 11, No 3 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2020.011.03.15

Abstract

The crash box is a passive safety system placed between the bumper and the mainframe of the car that functions as an energy absorber to reduce the impact of driving accidents. The purpose of this study is to determine the optimal level of factors and analyze the factors that provide the most significant effect on energy absorption in a multi-cell hexagonal crash box. Identification of parameters that affect the crash box in energy absorption, namely: the position of placement hole (P), the distance of position hole (L), the thickness of crash box (t), and the hole diameter (D). The modeling method has used the design of the crash box by utilizing a computer simulation with software ANSYS 17.0. This research uses aluminum material type AA 6061-T4 and impactor material uses structural steel. Modeling loading using the frontal crash test method. In this modeling, the impactor with a speed of 7.67 m/s with a deformation length of 100 mm. This research uses the experimental design of the Taguchi method with the L27 orthogonal array. The optimization result were obtained optimum design parameter multi-cell hexagonal crash box with parameter settings P = inner wall; L = 112.5 mm; t = 2 mm, and D = 6.6 mm. Based on the calculated F value ≥ F Table, the factors P, t, and D affect the ability to absorb energy. Thickness crash box (t) has the highest contribution of 98.10% in increasing the value of energy absorption.
Tujuan utama moderasi beragama perspektif Abdul Malik Karim Amrullah Diana, Diana; Suhada, Suhada; Rismanto, Muhammad; Utomo, Ainur Alam Budi; Abdullah, Sandy Husein
Takuana: Jurnal Pendidikan, Sains, dan Humaniora Vol. 4 No. 2 (2025): Takuana (July-September)
Publisher : MAN 4 Kota Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56113/takuana.v4i2.153

Abstract

This study identifies and analyzes Buya Hamka’s views on religious moderation. The method used is library research with content analysis. Based on the research results, Buya Hamka’s views on religious moderation emphasize balance, steadfastness, justice, and tolerance. By applying these values, humans must understand and respect each other. Islam teaches a good relationship with God and other humans, where the practice of worship always produces a peaceful attitude towards others. Therefore, the ultimate goal of religious moderation, according to Buya Hamka, is the creation of happiness and peace among people of different beliefs. To actualize this concept of religious moderation, steps that can be taken include: incorporating related materials into formal education, holding seminars or talk shows, supporting content creators who promote diversity, and creating a platform about religious moderation. These steps are important because the millennial generation is very active on social media, allowing the values of peace to be conveyed and felt amidst existing differences.
Investigation of surface roughness in turning AISI 1020 steel using minimum quantity lubrication (MQL) with recycled cooking oil Rismanto, Muhammad; Sirajuddin, Awal Syahrani; Hair, Jumaddil; Hidayat, Hidayat; Yandi, Yandi; Rozy, Fachrul
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7699

Abstract

This study investigates the influence of the Minimum Quantity Lubrication (MQL) technique and spindle speed on the surface roughness of AISI 1020 steel during turning operations. recycled cooking oil was utilized as an environmentally friendly MQL lubricant, offering potential as a substitute for conventional mineral oils. In this experiment, two independent variables were considered: the lubrication condition (MQL and dry cutting) and spindle speed, which was tested at three levels (630 rpm, 800 rpm, and 1000 rpm). The dependent variable was surface roughness. MQL was selected due to its ability to enhance cooling and lubrication efficiency while minimizing environmental impacts. Experimental results indicated that at a spindle speed of 1000 rpm, surface roughness achieved 2,221 µm with MQL, compared to 2,824 µm without MQL. These findings highlight that recycled cooking oil-based MQL significantly improves the surface finish and demonstrate that the proper combination of lubrication parameters and spindle speed enhances machining quality. Moreover, this research supports sustainable manufacturing by promoting the use of Recycled Cooking Oil as a green lubricant alternative.
Experimental Investigation Of MQL Turning Parameters On Surface Quality And Tool Wear Toward Green Machining Practices Gobel, E'ep Fadil Abdilah; Rismanto, Muhammad; Selleng, Kristian; Sirajuddin, Awal Syahrani; Iskandar, Iskandar; Asmara, Anjar
Jurnal Polimesin Vol 24, No 1 (2026): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i1.8327

Abstract

This study aims to determine the effect of spindle speed and air pressure on surface roughness and tool wear in the turning process of S45C steel using the Minimum Quantity Lubrication (MQL) system with used cooking oil as an environmentally friendly alternative cutting fluid. The spindle speed was varied at 800, 1000, and 1200 rpm, while the air pressure was set at 1, 2, and 3 bar. The experiments were carried out on a conventional lathe machine with controlled variables including the S45C workpiece material, a feed rate of 0.017 mm/rev, a depth of cut of 0.5 mm, and the use of a carbide insert tool. The dependent variables observed were surface roughness and tool wear. The results show that the application of the MQL system significantly reduced surface roughness and slowed down tool wear compared to dry cutting. The lowest surface roughness value was obtained at a spindle speed of 800 rpm and an air pressure of 2 bar under MQL conditions, while the highest tool wear occurred at 800 rpm and 1 bar without MQL. An air pressure of 2 bar provided the best balance between lubrication and cooling effects, maintaining the stability of the lubricant in the cutting zone. The combination of MQL at 2 bar air pressure and 800 rpm spindle speed proved effective in producing a smoother surface finish, extending tool life, and supporting green manufacturing practices through the utilization of used cooking oil as an eco-friendly alternative cutting fluid.
Co-Authors Abdullah, Sandy Husein Anjar Asmara Awal Syahrani Sirajuddin Diana Diana Fachrul Rozy Gobel, E'ep Fadil Abdilah Hidayat Hidayat Iskandar Iskandar JUMADDIL HAIR Kristian Selleng Moch. Agus Choiron Sugiono Sugiono Suhada Suhada, Suhada Utomo, Ainur Alam Budi Yandi, Yandi