Análisis de la resistencia a la fatiga en AA 7075 T6 en función del ensayo de flexión rotativo

Abstract

The purpose of this study is to improve and implement the 7075 T6 aluminum alloy rotary bending analysis machine for fatigue testing so that mechanical engineering students can experimentally broaden their understanding in the field of receiving mechanics through practicals from laboratory. Since the behavior of metals in fatigue situations is an underresearched area in the laboratory due to the challenges of maintaining and upgrading the infrastructure, a rehabilitation plan for a flexible fatigue rotating machine was developed to facilitate data collection. The plan includes changes in the control system, the positioning of the components and the assembly system of the machine, which allowed the tests to be carried out successfully. To solve this problem, this work focused on achieving the following objectives through the identification of the 7075 T6 aluminum alloy material, which was carried out by means of a tensile test, using the standardized norms according to the case. With this, it was possible to use the R. R. Moore rotary bending machine for the fatigue tests and to obtain the S-N curve corresponding to the test material. The rotational bending fatigue test demonstrated an inverted relationship between the work applied to the specimen and the number of steps until the error, since the higher the load, the fewer number of cycles.