Residual Stress Fields due to Varying Tack Welds Orientation in Circumferentially Welded Thin-Walled Cylinders

Abstract

The local, nonuniform heating and subsequent cooling during the welding processes causes complex thermal stress/strain fields to develop that finally leads to residual stresses, distortions, and their adverse consequences. Residual stresses are of prime concern to the industries producing weld-integrated structures around the globe because of their obvious potential to cause dimensional instability in welded structures, contribute to premature fracture/failure, along with the significant reduction in fatigue strength and in-service performance of the welded structures. Arc welding with single or multiple weld runs is an appropriate and cost effective joining method to produce high-strength structures in these industries. A multifield interaction in arc welding process makes it a complex manufacturing process. A number of geometric and process parameters are contributing to significant stress levels in arc-welded structures. In the present analysis, parametric studies are conducted for the effects of a critical geometric parameter, that is, tack weld on the corresponding residual stress fields in circumferentially welded thin-walled cylinders. Tack welds offer a considerable resistance to the shrinkage and the orientation, and size of tacks can alter altogether the stress patterns within the weldments. Hence, a critical analysis for the effects of tack weld orientation is desirable.

Experimental validation of numerical simulation on deformation behaviour induced by wire arc additive manufacturing with feedstock SS316L on substrate S235

“…The von Mises yield criterion, provided by Eq. ( 7), is the most extensively used plasticity model by many researchers where 1 , 2 and 3 are the principal stresses [43][44][45][46][47].…”

Thermal and structural modelling of arc welding processes: A literature review

“…Welding stresses originate from the restrained welding distortion. Many research papers 24–51 describe the models used to find the welding distortion and welding residual stresses. To get the exact model, the field describes the specimen of metal needed to be able to change its volume and shape; along with this, properties of the materials are required like specific heat, plasticity, Poisson’s ratio and density.…”

“…It was concluded that axial residual stresses also depend on the different orientation of tack welds at an axial part 180 o from the beginning of weld location for the inner and outer planes. 29,30 Validation on the distribution of the temperature and residual stresses which were induced due to TIG welding of SS 304 was done by Deng. 31 Investigation on the welding residual stress in HAZ of cruciform hollow sectional welded tube joint was done by Brar and Singh.…”

Numerical simulation on residual stresses of stainless steel SS-304 thin welded pipe

“…4 With the change in the orientation of the welding, there is great change in the welding distortion. 5 Simulation of the submerged arc welding process was done using the commercial software ANSYS. The temperature distribution and the angular displacement of the mild steel welded plate were compared with the experimental data of Arora et al 6 and found the good agreement with conclusion that the double-ellipsoidal heat source is more accurate than the Gaussian heat source distribution.…”