Título
Residual Stress Pattern Prediction in Spray Transfer Multipass Welding by Means of Numerical SimulationVersión
Version publicada
Derechos
© 2018 The author(s)Acceso
Acceso abiertoVersión del editor
https://doi.org/10.5772/intechopen.72134Publicado en
Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments Editor
IntechPalabras clave
Multipass Welding
Analytic procedure
finite element method
equivalent heat source ... [+]
Analytic procedure
finite element method
equivalent heat source ... [+]
Multipass Welding
Analytic procedure
finite element method
equivalent heat source
temperature distribution
Residual stress [-]
Analytic procedure
finite element method
equivalent heat source
temperature distribution
Residual stress [-]
Resumen
One of the main problems of gas metal arc welding (GMAW) process is the generation of residual stresses (RS), which has a direct impact on the mechanical performance of welded components. Nevertheless ... [+]
One of the main problems of gas metal arc welding (GMAW) process is the generation of residual stresses (RS), which has a direct impact on the mechanical performance of welded components. Nevertheless, RS pattern prediction is complex and requires the simulation of the welding process. Consequently, most of the currently used dimensioning approaches do not consider RS, leading to design oversized structures. This fact is especially relevant in big structures since it generates high material, manufacturing and product transportation costs. Nowadays, there are different numerical methods to predict the RS generated in GMAW process, being Goldak’s method one of the most widely used model. However, the use of these methods during the design process is limited, as they require experimentally defining many parameters. Alternatively, in this chapter, a new methodology to define the heat source energy based on the spray welding physics is exposed. The experimental validation of the methodology conducted for a multipass butt weld case shows good agreement in both the temperature pattern (9.16% deviation) and the RS pattern (42 MPa deviation). Finally, the proposed methodology is extended to analyse the influence of the thickness and the number of passes in the RS pattern of thick T-joint welds. [-]
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