Análise de durabilidade de componentes automotivos

Abstract

Durability tests are applied to reproduce services conditions and to guarantee the safety and functionality of mechanical components. In the automotive industry, the testing field is broadly used for estructural validation of chassis, as well all the structures that compound the vehicle, such as suspension, cab, steering system, exhaust, and many others. The test field is composed by several events that allow the customization of an acelerated test for each kind of vehicle and application. This paper proposes an application of the classical theory of fatigue for a forecast of life from the experimental tensions analysis. The experimental data were obtained in a structural component during the passage of a heavy vehicle in four durability track events. For the count of the fatigue cicles has been used the simplified Rainflow method and posteriorly the Palmgren-Miner rule was used for the determination of the acumulated damage and of the number of necessary repetitions to the material failure on each event.