Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
Prototype of a Torsion Fatigue Machine Based on Unbalanced Rotation
Submission Author:
Cleide Vieira , SC
Co-Authors:
Renato Barbieri, Guilherme Ourique Verran
Presenter: Cleide Vieira
doi://10.26678/ABCM.COBEF2017.COF2017-0526
Abstract
The fatigue test machine was designed and built to torsional loading. The design is relatively simple, low cost manufacturing, allowing its construction in conventional machining, easy maintenance and low operating cost. The machine is powered by an electric motor and a variable frequency drive allows controlling of your speed. To avoid undesired fluctuations in rotation during the test, the movement is transmitted to the unbalanced rotating disc with the use of two synchronous pulleys and a timing belt. The torque generated in the specimen and/or component under test originates in a unbalanced rotating disc and the magnitude of this torque is controlled by varying the unbalanced mass or the motor rotation. Tests can be performed on standard specimens or components adaptable to the machine fixing system. The tests can be applied to metallic or nonmetallic materials and the torque amplitude can be constant or variable in time with R (ratio between the maximum and minimum stress) also varies. The torque is measured with a reaction torquemeter that is coupled at one end of the specimen and is monitored throughout the test. The tests indicate that the designed and built fatigue machine works satisfactorily for cyclic loading tests with constant and variable amplitude.
Keywords
fatigue, Torsion, Test Machine
