DESAIN DAN SIMULASI UJI KEKUATAN CHASSIS MOBIL SEM JENIS PROTOTYPE MENGGUNAKAN MATERIAL ALUMINIUM ALLOY 7075

Abstract

Abstrak Rangka adalah salah satu komponen penting yang harus dibentuk dalam konstruksi yang kuat untuk mendukung bobot kendaraan. Desain kendaraan dalam kelas prototype tidak harus beroda empat dan tidak diharuskan untuk mengikuti desain kendaraan beroda empat. Faktor keamanan adalah parameter utama untuk menentukan kekuatan rangka mobil, sehingga faktor keamanan oleh rangka harus melebihi 2 untuk dapat diasumsikan aman. Tujuan dari kajian ini adalah untuk menentukan desain rangka yang cocok untuk jenis mobil prototype SEM dengan software Solidworks. Selain merancang, tujuan dari kajian ini adalah untuk menentukan perpindahan, faktor keamanan, dan fatik dengan simulasi melalui Solidworks. Kajian ini menggunakan metode pengembangan (Riset dan Pengembangan) dengan bantuan software. Software yang digunakan adalah Solidworks yang mampu menguji konstruksin rangka dengan simulasi untuk menentukan Abstract The chassis is one of the important parts of the car that must have strong construction to withstand the weight of the vehicle. The vehicle design in the prototype class does not have to be four-wheeled and does not have to follow the current four-wheeled vehicle design. The safety factor is the main parameter to determine the strength of a car frame so the safety factor on the chassis must exceed 2 to be safe. The purpose of this study was to determine the proper chassis design for the SEM-type car prototype with Solidworks software. In addition to designing, the purpose of this research is to determine the displacement, safety factor, and fatigue with simulations on Solidworks. This study uses the method of development (Research and Development) with the help of software. The software used is Solidworks which can test chassis frame construction with simulations to determine displacement, stress, safety factor, and fatigue. This research resulted in 3 different chassis designs, namely chassis design 1 which has a length of 2800 mm and a width of 400, chassis design 2 has a length of 2730 mm and a width of 500, and chassis design 3 has a length of 2800 mm and a width of 400 mm. The displacement value in chassis design 1 is 2.84554 mm, on chassis design 2 it is 2.98822 mm and on chassis design 3 it is 2.07638 mm. The minimum safety factor in chassis design 1 is 5.4072, in chassis design 2 it is 4.81501 and in chassis design 3 it is 8.49078. Based on these results, it can be said that the displacement of chassis design 3 is better than chassis design 1 and chassis design 2, because it has a smaller displacement value. For the value of the safety factor, chassis design 2 is better than chassis design 1 and chassis design 3, because it has a smaller safety factor value. The minimum fatigue life in chassis design 1, chassis design 2 and chassis design 3 has the same value of 5 x 106 cycles due to the stress that occurs in the three chassis designs under the S-N curve.