Máquina de ensaio de fadiga de cargas axiais: montagem e instrumentação

Abstract

Parts and components when subjected to stresses cyclically a very large number of parts fail even being subjected to maximum stresses much lower than the ultimate tension of the material or even below the material flow stress reduced its life span and compromising the integrity of others components of the system. Thus, a test machine which makes it possible to simulate non-compliance and adverse conditions in the laboratory, in the form of products that are tailor-made and safety, not the design of the elements. In this context, the present study has the objective of assembling and instrumentation of a low cost fatigue test machine, reusing materials available at the UNIPAMPA / Alegrete Campus Mechanical Engineering course. From the obtaining and adequacy of components, as well as a check of the rigidity of the whole of the machine through simulations carried out computationally, where the components of the machines were submitted to high efforts and from Which were defined as ideal measurements of the second test body ASTM A370-08a in order to ensure the integrity of the machine. The study results in a functional, resistant and safe product, which supports simulating even high mechanical resistance materials such as Inconel 718, which presents the ultimate solution of 1400 MPa using 4 mm diameter test bodies.