Formula SAE Frame Torsional Stiffness Study using FEA

Author(s):  
João Augusto da Costa ◽  
Daniel Vilela
2018 ◽  
Vol 153 ◽  
pp. 04002 ◽  
Author(s):  
Cong Hao Liu ◽  
Gang Li ◽  
Ying Hao Ma ◽  
Xu Guang Yang

Since torsional loading and the accompanying deformation of the frame and suspension parts can affect the handling and performance of the car, torsional stiffness is generally thought to be a primary determinant of frame performance for a FSAE car. According to the FSAE Rules, different tube cross-sections are available for some members of a space frame. By finite element simulation, this research compared different tube shapes and thicknesses. Compared with 1.6 mm thickness round tube, square tube with the same wall thickness can improve the torsional stiffness by 23% in test Mode I, and 65% in test Mode II. The 1.2mm thickness square tube also can improve the torsional stiffness by 6% and 39% in test Mode I and Mode II. From these comparisons, it can be found the usage of square tube can improve the frame torsional stiffness efficiently.


2021 ◽  
Vol 2 (2) ◽  
pp. 015-023
Author(s):  
Irsyadi Yani ◽  
Amir Arifin ◽  
Ahmad Irham Jambak ◽  
Gunawan Gunawan ◽  
Dendy Adanta ◽  
...  

Formula Society of Automotive Engineers (FSAE) is a competition where the students design, build, and race the formula-style car. In this competition, the regulation stringent for the safety of participants. Chassis is one of the regulated parts among the other parts. This paper examines design process followed by chassis analysis by using Solidworks 2018 and Abaqus/CAE 6.14 software. The analysis process is carried out with Static Vertical Test, Torsional Stiffness Test, and Crash Impact Test using a safety standard in the form of a safety factor that must be more than 1 (SF> 1) to ensure the safety of the driver. The aim is to obtain an optimum final design based on FSAE Japan regulation as a reference for the Universitas Sriwijaya electric car team, namely Sriwijaya Eco in making the framework for the upcoming electric formula car.


2018 ◽  
pp. 232-241
Author(s):  
MS Santos ◽  
AE Treml
Keyword(s):  

A competição Fórmula SAE ocorre anualmente em diversos lugares do mundo. No Brasil acontece em Piracicaba, e envolve estudantes de diversas universidades de todo o país, e, inclusive estrangeiras. O objetivo da competição é de que as equipes desenvolvam um protótipo de carro de corrida tipo fórmula, que será avaliado em diversas provas, desde estáticas à dinâmicas. Parte fundamental do desenvolvimento do protótipo é a concepção da transmissão, pois esta é responsável pela transferência de torque e potência do motor às rodas do protótipo. O projeto deve ser feito de modo a proporcionar elevado torque às rodas em velocidades relativamente baixas do veículo, pois, devido ao fato de que a pista do evento brasileiro tem poucas retas, a rápida recuperação de velocidade é um fator de maior importância para o bom desempenho do carro em detrimento da velocidade máxima do mesmo. Para se obter essas características de comportamento do veículo, busca-se uma razão adequada entre o número de dentes da coroa (engrenagem que transmite o torque as rodas) e do pinhão (engrenagem na saída do motor). Para esta seleção utilizou-se dados de torque máximo, e sua respectiva rotação, sendo este dado fornecido pelo fabricante do motor utilizado no carro, o qual corresponde ao modelo da moto XT660 da Yamaha. Foram analisadas diversas relações, através de gráficos do tipo dentes de serra, que fornecem a velocidade do veículo pela rotação em cada marcha, selecionando-se, assim, a relação que possibilitasse a troca de marcha do veículo com a menor perda de torque possível, mantendo uma boa evolução de velocidade. Da análise destes dados obteve-se que o valor de relação mais adequado ao sistema é de 3/1, ou seja, a coroa deve ter uma quantidade de dentes 3 vezes maior que o pinhão.


1996 ◽  
Vol 24 (4) ◽  
pp. 339-348 ◽  
Author(s):  
R. M. V. Pidaparti

Abstract A three-dimensional (3D) beam finite element model was developed to investigate the torsional stiffness of a twisted steel-reinforced cord-rubber belt structure. The present 3D beam element takes into account the coupled extension, bending, and twisting deformations characteristic of the complex behavior of cord-rubber composite structures. The extension-twisting coupling due to the twisted nature of the cords was also considered in the finite element model. The results of torsional stiffness obtained from the finite element analysis for twisted cords and the two-ply steel cord-rubber belt structure are compared to the experimental data and other alternate solutions available in the literature. The effects of cord orientation, anisotropy, and rubber core surrounding the twisted cords on the torsional stiffness properties are presented and discussed.


1991 ◽  
Vol 19 (3) ◽  
pp. 142-162 ◽  
Author(s):  
D. S. Stutts ◽  
W. Soedel ◽  
S. K. Jha

Abstract When measuring bearing forces of the tire-wheel assembly during drum tests, it was found that beyond certain speeds, the horizontal force variations or so-called fore-aft forces were larger than the force variations in the vertical direction. The explanation of this phenomenon is still somewhat an open question. One of the hypothetical models argues in favor of torsional oscillations caused by a changing rolling radius. But it appears that there is a simpler answer. In this paper, a mathematical model of a tire consisting of a rigid tread ring connected to a freely rotating wheel or hub through an elastic foundation which has radial and torsional stiffness was developed. This model shows that an unbalanced mass on the tread ring will cause an oscillatory rolling motion of the tread ring on the drum which is superimposed on the nominal rolling. This will indeed result in larger fore-aft than vertical force variations beyond certain speeds, which are a function of run-out. The rolling motion is in a certain sense a torsional oscillation, but postulation of a changing rolling radius is not necessary for its creation. The model also shows the limitation on balancing the tire-wheel assembly at the wheel rim if the unbalance occurs at the tread band.


Author(s):  
ALVARO ROCHA ◽  
Luan Correia ◽  
Raimundo Duarte ◽  
Emerson da Trindade Marcelino

Author(s):  
Gabriela Lima Silva ◽  
Mateus Coutinho Moraes ◽  
Miguel Ângelo Menezes

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