Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Improving chassi kart structure considering fatigue, modal and static analyses through Finite Element Analysis
Submission Author:
Giuliano Mesquita , DF , Brazil
Co-Authors:
Giuliano Mesquita, Euclides Delgado Marques Santanna, Carla Anflor
Presenter: Euclides Delgado Marques Santanna
doi://10.26678/ABCM.COBEM2023.COB2023-1399
Abstract
Karts are vehicles with tubular and simple geometry. Very commom since the 60’s, this category is essential for the development of pilots and single-seaters. The objective of this work is to comprehend vehicle car behavior related to estructural fatigue and displacement of a kart chassis structure used in professional competitions. Despite Kart national and international competitions are well established, there are few studies on the structure of these class of vehicles. In this sense, a computational model based on a homologated chassis was created and modelled by using the finite element method. In order to obtain accurate results and reduce computational costs, the geometry was simplified and treated as a shell. External loads were validated in practical tests, using data consulted from the Brazilian Confederation of Motorsport and the chassis manufacturer. Two types of analysis were chosen to study the structural behavior of the chassis: static structural, considering supports, external forces, and material properties, and the analysis of natural frequencies, considering geometry and contact between parts to obtain the vibration modes of the structure. With aid of numerical simulations, the stress field and natural frequencies of the present chassi were obtained. Afterthought, the fatigue analysis is also addressed and parameters such as safety coefficient and life were obtained. The fatigue contributes to the development of safer and more efficient karts for professional competitions. The modal analysis was also used to check structural wellness. Results show that changes in frame tube thickness affect natural frequencies, while anti-roll bar removal increases displacement. Thus, in addition to the behavior of the vehicle, the anti-roll bar also changes the structural characteristics and the life of the part. This study is relevant not only for the professional kart racing field but also for other areas that involve structural analysis of vehicles. The application of the finite element method and numerical simulations can be useful for evaluating and improving the safety and efficiency of automotive structures in different designs.
Keywords
Anti roll bar, Go karting, Finite element analyses, Numerical simulation, fatigue, Modal
