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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2012

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Modelling the effects of preheating on angular distortions in one sided fillet welds

Sadat Ali M., Rao S., Rao N.

Journal of Achievements in Materials and Manufacturing Engineering

2012

Vol. 55, nr 2

578--583

In all fusion welded joints, residual, transverse, lateral, angular and bowing deformations are observed. In fillet joints the angular distortion is the predominant deformation. The distortions and thermal history of a fillet joint can be measured experimentally which is not economically viable all times. It is time consuming and the deformation can be measured only after the completion of the joining process. So prevention is not possible. In the present work a numerical elasto-plastic thermo mechanical model has been developed for predicting the thermal history and resulting angular distortions of manual metal arc welding in one sided fillet joints. To create a realistic simulation of the single sided fillet welding, a moving distributed heat source is used in finite element model. The effect of filler metal deposition is simulated by implementing a birth and death process for the elements. The temperature dependent material properties are used for predicting the transient temperature distribution in the material which in turn helps to predict the angular distortion profiles of the fillet joint. The simulated modeling results obtained are found to be in complete agreement with the experimental values.