Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Development of a pneumatic bench for testing truss bridges
Submission Author:
Isaac Varela Brito Guimarães de Souza , SC
Co-Authors:
Isaac Varela Brito Guimarães de Souza, Antonio Carlos Valdiero, Ruben Solarte Bolaños, Edson Baal, Tárik El Hayek Rocha Pitta de Araujo, Gabriel Petry, Sabrina Knoll Godoy Ilha, Leticia Renata De carvalho
Presenter: Isaac Varela Brito Guimarães de Souza
doi://10.26678/ABCM.COBEM2023.COB2023-0856
Abstract
This work presents the design of a pneumatic bench for testing truss bridges as a teaching tool in the classroom, making easier the understanding of the content by the students. When the students are in the early phases of the engineering degree, they frequently find difficulties to learn, so a practical example of what was ministered in class can help the students to have a better comprehension of the course. The bench can be particularly helpful to statics students because they can test the theories learned in class by creating bridges of wood sticks and using the bench to test the maximum amount of load that the bridge support and how it brakes. The work aim is to decrease the difficulties to comprehend the more advanced semesters content by reducing the miscomprehension in the early stages. The pneumatic systems have cheaper manutention and are lighters and have a better cost benefit, also it’s secure to use because the system use compressed air so don’t have the risk of intoxication, short circuit, and in cases of overpressure have less risk of leaking, and don`t present oil leak. But its behavior is more difficult to model, since they have inherent non-linear characteristics. The project was divided into five stages: literature review, design, fabrication, and testing. The literature review was responsible for searching for previous works of test bench for spaghetti bridge contest and systematize the knowledge of pneumatic systems. After the bibliographic review, a CAD modeling of the bench and the actuator was made and was projected a frugal solution for the pneumatic system to make the load in the bridge. The bench was successfully fabricated and tested. At the end of this work was expected a functional prototype of the bench. The prototype worked successfully, and it was more precise than other test benches like used in other universities that uses predefined discrete weights. Also was a cheap alternative for a pneumatic system. The static class students also reported that was better comprehension of the theme when they saw the acting forces in the bridges.
Keywords
Pneumatic, testing structures, Engineering education
