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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
I.M. Mara
University of Mataram ID Scopus: https://www.scopus.com/authid/detail.uri?authorId=57163889600
Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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Experimental study of the effect of load and vehicle speed on energy consumption of electric vehicles, Faculty of Engineering, University of Mataram I.M. Mara; H.S. Tira; T. Rachmanto; I.M. Nuarsa
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.
Characteristics of porosity properties and wear resistance of aluminum matrix composite (AMC) reinforced with silicon carbide (SiC) particles using stir casting method A.H Simangunsong; I.K.G. Sugita; D.N.K.P. Negara; I.M. Mara
Dinamika Teknik Mesin Vol 16, No 1 (2026): 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.v16i1.1285

Abstract

The use of composite materials with superior mechanical properties has become an important focus in addressing the challenges of continuously advancing technology, particularly for applications that require lightweight materials with high strength and good corrosion resistance. One material that has attracted considerable interest is aluminum due to its favorable physical, mechanical, and chemical properties. However, aluminum has limitations in terms of hardness and wear resistance, which still need to be improved. This study aims to evaluate the effect of adding silicon carbide particles (SiCp) on the porosity characteristics and wear resistance of aluminum matrix composites (AMC) produced using the stir casting method, which is a technique involving the mixing of molten metal and reinforcement particles through continuous stirring. The casting process was carried out at a temperature of 700 °C. The variations of SiC composition used were 0%, 1%, 2%, 3%, and 4%. Wear testing was conducted using the reciprocating ball-on-flat method in accordance with the ASTM G133-05 standard, while the porosity level was analyzed through immersion of the samples in a liquid fluid. The results show that an increase in the weight fraction of SiC leads to a reduction in the wear rate, with the lowest wear rate reaching 1.27 × 10⁻⁷ g/cycle at a 4% SiC fraction and the highest at 0% SiC amounting to 1.84 × 10⁻⁶ g/cycle. In contrast, the porosity calculation shows an increasing trend from 1.85% at 0% SiC to 27.18% at a 4% SiC fraction.
Co-Authors A.H Simangunsong D.N.K.P. Negara H.S. Tira I.K.G. Sugita I.M. Nuarsa T. Rachmanto