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RANCANG BANGUN BODI MOBIL LISTRIK MENGGUNAKAN FIBERGLASS Zakaria Ramadhan; Bayu Saputra; Yasin; Yogi Prasetia; Sudarsono; Nanang Endriatno
Piston: Jurnal Teknologi Vol 10 No 1 (2025): June 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i1.84

Abstract

Electric cars are cars that are driven by electric motors and use electrical energy stored in batteries. The use of electric cars certainly requires a vehicle design that can meet automotive needs that are more focused on the chassis and body. The performance of electric cars is influenced by the weight and aerodynamics of the car itself, one of which is the body of the electric car, to produce good performance, a design that has a low drag coefficient value is needed so that it can cut through the wind well and make this electric car go fast. The material used to make this electric car body is fiberglass with a hand lay up application technique. In making it, several preparations are needed, namely making designs, making moulds, and making bodies using fiberglass media. The results of the study indicate that for the specifications of the car body design results, namely the body height of 60 cm, body width of 82 cm, body length of 2.73 m, upper body width of 63 cm, inner body width of 50 cm, front body height of 37 cm, body glass length of 101 cm, glass width of 63 cm, rear glass height of 44.5 cm, front glass height of 10.5 cm with a body weight of 19.25 kg and a glass weight of 2.15 kg. The conclusion of this study is that the prototype body of the electric car can be attached to the frame properly after the car is used or driven and the prototype body. Electric cars are made of fiberglass, this material is very appropriate because it has a light character, easy to shape. But for performance in electric cars, body weight greatly affects the speed of electric cars so it is hoped that further research will be developed with a lighter form of electric car body.
Rekayasa Material Serat Alternatif Melalui Desain Mesin Pengurai Sabut Kelapa Nanang Endriatno
Piston: Jurnal Teknologi Vol 10 No 2 (2025): Desember 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i2.126

Abstract

Coconut fiber is a byproduct of the coconut industry that is abundant and has not been utilized optimally. Coconut fiber has good mechanical properties, is environmentally friendly, and has the potential to be used as an alternative fiber material. This study aims to design a coconut fiber decomposing machine that is capable of producing alternative fiber materials. The research methods include literature study, machine mechanism design, and machine design. The machine is designed with a 30x30x3 mm angle profile steel frame measuring 700x500x400 mm in height x length x width, using a decomposing cylinder with a diameter of 164 mm and a length of 355 mm. The decomposing cylinder functions to decompose coconut fiber into fiber. Another main component is the coconut fiber holder plate that functions to clamp the coconut fiber to keep it in position during machine operation. The coconut fiber will be held in the coconut fiber holder, while the other part will fall through the outlet channel. This machine is driven by a 5.5 HP electric motor with a maximum rotation of 1400 rpm. The transmission system uses a belt and pulleys, with a 70 mm input pulley and a 200 mm output pulley, producing a maximum rotation speed of 490 rpm. The design is expected to make a machine capable of increasing the added value of coconut fiber waste and supporting the development of alternative fibers based on natural fibers.