Evaluación de probetas cilíndricas solicitadas a torsión cíclica simétrica//Evaluation of cylindrical specimens subjected bytorsional symmetrical load cycles

Authors

  • Pavel Michel Almaguer-Zaldivar Universidad de Holguín. Facultad de Ingeniería Mecánica

Abstract

La fatiga de los materiales ingenieriles ha sido durante muchos años un tema de interés para ingenieros e investigadores. En este trabajo se describieron las características de una máquina torsional para ensayos a fatiga de probetas solicitadas a torsión cíclica simétrica. Se mostraron además los resultados de probetas con y sin prefisura ensayadas en la máquina. Se explicó el funcionamiento de la misma. La aplicación del momento torsor cíclico simétrico se logró mediante un mecanismo de tres barras que es el encargado de convertir el movimiento de rotación que entrega el motor eléctrico en un desplazamiento angular alternativo en el cabezal móvil. Las probetas ensayadas presentaron el comportamiento típico de la rotura por fatiga. Se demostró que la máquina construida permite realizar los ensayos a torsión cíclica simétrica.

Palabras claves: máquina, fatiga, torsión, ciclos de carga, función de forma.
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Abstract

The fatigue of engineering materials has been for many years a topic of interest for engineers and researchers. In this work the characteristics of a torsional machine testing for fatigue tests of specimens under symmetric cyclic torsion are showed. The results of the specimens with and without pre-notch tested on the machine are also shown.The machine principle of operation was exposed. The application of the symmetrical cyclic torque was achieved by a three-bar mechanism that convert the motor rotation movement in an alternative angular displacement in the mobile headstock. The tested specimens presented the typical behavior of the fatigue failure.It was shown that the machine allows to perform the symmetric cyclic torsion tests.

Key words: machine, fatigue, torsion, load cycles, shape function.

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Published

2018-03-01

How to Cite

1.
Almaguer-Zaldivar PM. Evaluación de probetas cilíndricas solicitadas a torsión cíclica simétrica//Evaluation of cylindrical specimens subjected bytorsional symmetrical load cycles. Ing. Mec. [Internet]. 2018 Mar. 1 [cited 2025 Sep. 13];21(2):93-100. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/585

Issue

Vol. 21 No. 2 (2018): mayo-agosto. En homenaje al Profesor Dr Carlos Eulalio Novo Soto

Section

Original article

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