Simulación numérica del coeficiente de concentración de tensiones en grietas de uniones soldadas a tope//Numerical simulation of the stresses concentration coefficient in cracks butt welded joints

Authors

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

Abstract

La fatiga es uno de los más complejos fenómenos en el estudio de falla en piezas sometidas a la acción de cargas dinámicas. El objetivo de este trabajo es exponer una metodología basada en el método de los elementos finitos para la evaluación del coeficiente de concentración de tensiones en grietas longitudinales y transversales de uniones soldadas a tope. El material utilizado es el acero AISI 1015 y el electrodo E6013 de fabricación cubana. Se caracterizan los defectos mencionados y posteriormente se varían sus dimensiones para obtener relaciones entre ellas y el coeficiente de concentración de tensiones. Las simulaciones se realizaron con el software CosmosWork 2008. Con esta metodología se obtuvieron nomogramas y ecuaciones que describen el comportamiento del coeficiente de concentración de tensiones en diferentes nodos de la grieta. Los valores del coeficiente de concentración de tensiones obtenidos muestran una correspondencia con la variación de la severidad del defecto.

Palabras claves: coeficiente de concentración de tensiones, simulación, uniones soldadas a tope, grietas, fatiga.

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Abstract

Fatigue is one of the more complex phenomenons in the failure of parts under dynamic loads. In this work is pursued as main objective to expose a methodology based on the finite elements method for the evaluation of the stress concentration coefficient in longitudinal and traverse cracks of butt welded joints. The material bases selected to carry out the study it is the steel AISI 1015 and the electrode E6013 Cuban manufacturing. It is carried out a characterization of the mentioned defects and later the dimensions of each defect are varied to obtain relationships between them and the stress concentration coefficient. The simulations were carried out with the software CosmosWork 2008. With the proposed methodology were obtained graphs and equations that describe the behavior of the stress concentration coefficient in different nodes of the crack. The stress concentration coefficient value it is in correspondence with the defects sizes.

Key words: stress concentration coefficient, simulation, butt welded joints, cracks, fatigue.

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How to Cite

1.
Almaguer-Zaldivar P. Simulación numérica del coeficiente de concentración de tensiones en grietas de uniones soldadas a tope//Numerical simulation of the stresses concentration coefficient in cracks butt welded joints. Ing. Mec. [Internet]. 2012 Sep. 1 [cited 2025 Sep. 13];15(3):176-90. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/428

Issue

Vol. 15 No. 3 (2012): september-december

Section

Original article

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