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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
Rachmanto, T.
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Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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Simulasi pengaruh bentuk piston bowl dan dome terhadap perubahan sifat mekanik menggunakan software Ansys dengan metode finite element analysis Zukfikar, M.P.; Setyawan, P.D; Rachmanto, T.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 14, No 1 (2024): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v14i1.720

Abstract

A piston is a component of an internal combustion engine. This study numerically investigated variations in the shape of the piston head to determine mechanical changes affected by static surface pressure and temperature. The method used is FEA (Finite Element Analysis) with steady-state thermal and static structural simulations. This study aims to determine the effect of changes in the shape of the Piston Head Bowl and Piston Head Dome on the value of Von Mises stress, strain, deformation, and safety factors using Ansys software. This research was conducted numerically with a variety of concave piston heads (bowl) with surface lengths of 3 mm, 5 mm, 7 mm, 9 mm, and 12 mm with a depth of 1.2 mm and convex piston heads (dome) with surface lengths of 3 mm, 5 mm, 7 mm, 9 mm, and 12 mm with a slope of 182⁰. The results showed that the variation of piston head shape affects the value of von Mises stress, strain, deformation, and safety factor. where the convex piston head (dome) has a lower von Mises stress value and maximum strain than the concave piston head (bowl), the deformation value of the dome piston head is higher, and the minimum safety factor value of the dome piston is higher. The lowest Von Mises stress value is 611.42 MPa on the piston head dome, the maximum strain value is 0.007741, the highest maximum deformation value is 0.055 mm on the piston head dome with a surface length of 12 mm, and the best minimum safety factor value is 0.515 on the piston head dome.
Experimental study of the effect of load and vehicle speed on energy consumption of electric vehicles, Faculty of Engineering, University of Mataram Mara, I.M.; Tira, H.S.; Rachmanto, T.; Nuarsa, I.M.
Dinamika Teknik Mesin Vol 15, No 2 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i2.1111

Abstract

The use of electrical energy for vehicles is currently very relevant because its efficiency is relatively high and is environmentally friendly, due to, it does not emit exhaust gases emission. Indonesia has a huge potential to develop electric vehicles because there is a lot of nickel available to be processed into batteries. However, it is necessary to consider the level of energy use of the electric vehicle that will be made. How much does speed influence the use of electrical energy, or at what speed does an electric vehicle provide the greatest efficiency in energy use. This research is intended to study how much vehicle speed influences energy consumption and also to obtain the vehicle speed range with the lowest energy use efficiency in autonomous electric vehicles, Faculty of Engineering, University of Mataram. The lowest energy consumption occurs at a speed of 20 km/h with a load of 960 kg, which is 0.173 kWh/km. The most efficient speed for distance traveled per kWh is 30 km/h, regardless of vehicle weight. A speed of 40 km/h decreases efficiency, especially with a heavier load, while increasing the load at lower speeds (20 km/h and 30 km/h) does not significantly reduce efficiency, and even slightly increases the distance traveled.
Simulasi pengaruh bentuk piston bowl dan dome terhadap perubahan sifat mekanik menggunakan software Ansys dengan metode finite element analysis Zukfikar, M.P.; Setyawan, P.D; Rachmanto, T.
Dinamika Teknik Mesin Vol 14, No 1 (2024): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v14i1.720

Abstract

A piston is a component of an internal combustion engine. This study numerically investigated variations in the shape of the piston head to determine mechanical changes affected by static surface pressure and temperature. The method used is FEA (Finite Element Analysis) with steady-state thermal and static structural simulations. This study aims to determine the effect of changes in the shape of the Piston Head Bowl and Piston Head Dome on the value of Von Mises stress, strain, deformation, and safety factors using Ansys software. This research was conducted numerically with a variety of concave piston heads (bowl) with surface lengths of 3 mm, 5 mm, 7 mm, 9 mm, and 12 mm with a depth of 1.2 mm and convex piston heads (dome) with surface lengths of 3 mm, 5 mm, 7 mm, 9 mm, and 12 mm with a slope of 182⁰. The results showed that the variation of piston head shape affects the value of von Mises stress, strain, deformation, and safety factor. where the convex piston head (dome) has a lower von Mises stress value and maximum strain than the concave piston head (bowl), the deformation value of the dome piston head is higher, and the minimum safety factor value of the dome piston is higher. The lowest Von Mises stress value is 611.42 MPa on the piston head dome, the maximum strain value is 0.007741, the highest maximum deformation value is 0.055 mm on the piston head dome with a surface length of 12 mm, and the best minimum safety factor value is 0.515 on the piston head dome.
Co-Authors Mara, I.M. Nuarsa, I.M. Setyawan, P.D Tira, H.S. Zukfikar, M.P.