Construction Methods Comparison of Stress Concentrators Curves for Different Geometries of Machine Elements

Juan Diego Betancur Gomez, Felipe Hoyos Gomez, Daniel Osorio Patiño, Juan Juan Gonzalo Ardila Marin, Jorge Andres Sierra del Rio

Abstract


The aim of this study is to verify that the analysis of the phenomenon of stress concentration with simulation methods provides results that are consistent with the experimental, corroborating the ANSYS ® software is a powerful tool that minimizes costs and time in building graphics stress concentrators. This’s accomplished by showing that the concentration factor curves of experimental efforts available in the scientific literature can be made through simulations achieving results with very low error. For this reason, geometries were select for the study with different aspect ratios. Which were develop in the DesingModeler® ANSYS Workbench® module. Then the meshing of geometries was performing in Mechanical®, and underwent three load’s types: axial force, bending moment and torsional moment, which were set in the StaticStructural® module. Then it was get the maximum effort and it was calculated the nominal effort, relate calculating the numerical concentration factor to build concentration factor charts against the geometrical parameter that was being modified during the virtual experimentation; at the end, they were compared with the experimental curves consulted. With the results obtained it was concluded that it is possible to construct curves of stress concentration factor through simulations with the same confidence that are obtained with conventional experimental methods, but at a lower cost.


Keywords


Camara en espiral, turbina de reacción, Ansys – CFX, turbina Francis.

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