Avaliação estrutural de uma proposta de trem de pouso padrão aplicada a uma aeronave radio controlada da competição SAE Brasil aerodesign

Abstract

This work had as purpose the structural evaluation of a proposal of a standard landing gear for a radio controlled aircraft of the SAE Brasil Aerodesign competition. Of all the stages of the mission to be carried out, the most critical is the landing, because if the dimensioning of the landing gear is not in accordance with the requirements, the chances of completely damaging the aircraft structure are high. In addition to strength, the ideal landing gear needs to be light, impacting as little as possible on the weight of the cargo that the plane can carry during flight, and have a simple geometry, to allow its concept to be easily applicable to a new aircraft. This also gives the team more time to spend on other stages of the project. For the main definitions of the aircraft, the applicable references were verified. The study was then carried out with three models of different laminated composite materials, through numerical simulations using the Finite Element Method, with a software developed for orthotropic materials. With it, the displacement of each model and the failure prediction by the Tsai-Wu criterion were verified. In the results, considering the landing on only one wheel of the main train, an aircraft weighing about 136 N and a load factor of 2.67, the best result was verified in the unidirectional carbon fiber model, which obtained a displacement vertical of 31.9 mm in dynamic condition, safety factor of the Tsai-Wu failure criterion of 0.86, wing incidence angle variation of 1.41° and mass reduction of 53.5%, in comparison with the rigid model from the previous year. [resumo fornecido pelo autor]