Cálculo de Resistencia de Uniones Soldadas Auxiliado en el Análisis por Elementos Finitos
Fecha
2010-07-20
Autores
Ramos Martínez, Ariasny
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Editor
Universidad Central "Marta Abreu" de Las Villas
Resumen
En este trabajo de tesis se implementa, a partir de la metodología propuesta por Weaver, el cálculo de resistencia de uniones soldadas auxiliado en el análisis por ElementosFinitos mediante el software ANSYS MULTIPHYSICS. Se detallan los pasos a seguir en la metodología de cálculo, en la que a partir de modelos de elementos finitos del tipo SHELL se extrae el tensor de tensiones para cada nodo de la soldadura y luego empleando el análisis clásico se calcula la dimensión de soldaduras de filete unilaterales y bilaterales. Se comparan los resultados obtenidos mediante el empleo de la modelación y los obtenidos a partir de la metodología de cálculo clásico que considera la soldadura como “una línea”, demostrándose que se llega a dimensiones de soldaduras menos conservadores, con la implicación que esto tiene en los costos finales de fabricación.
La presente metodología al emplear además elementos tipo SHELL requiere menos recursos computacionales, lo que permite su aplicación al cálculo de soldaduras en estructuras complejas de grandes dimensiones, sin gran dificultad, por lo se considera es fácilmente aplicable en la industria nacional.
In this thesis it is implemented, starting from the methodology proposed by Weaver, the welded unions strength calculation aided in the Finite Elements Analysis by means of the software ANSYS MULTIPHYSICS. The steps are detailed to continue in the calculation methodology, in the one that starting from models of finite elements of the type SHELL the stress tensor is extracted for each node of the welding and then using the classic analysis the dimension of unilateral and bilateral fillet weldings is calculated. The results are compared obtained by means of the employment of the modelation and those obtained starting from the methodology of classic calculation that considers the welding like "a line", being demonstrated that you arrives to less conservative dimensions of weldings, with the implication that this has in the final costs of production. The present methodology when also using elements type SHELL requires less computations resources, what allows its application to the calculation of weldings in complex structures of big dimensions, without great difficulty. It is considered that the methodology is easily applicable in the national industry.
In this thesis it is implemented, starting from the methodology proposed by Weaver, the welded unions strength calculation aided in the Finite Elements Analysis by means of the software ANSYS MULTIPHYSICS. The steps are detailed to continue in the calculation methodology, in the one that starting from models of finite elements of the type SHELL the stress tensor is extracted for each node of the welding and then using the classic analysis the dimension of unilateral and bilateral fillet weldings is calculated. The results are compared obtained by means of the employment of the modelation and those obtained starting from the methodology of classic calculation that considers the welding like "a line", being demonstrated that you arrives to less conservative dimensions of weldings, with the implication that this has in the final costs of production. The present methodology when also using elements type SHELL requires less computations resources, what allows its application to the calculation of weldings in complex structures of big dimensions, without great difficulty. It is considered that the methodology is easily applicable in the national industry.
Descripción
Palabras clave
Resistencia de Uniones Soldadas, Elementos Finitos, Industria Nacional