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|Title: ||A Validated Numerical Model for Residual Stress Predictions in an Eight-Pass-Welded Stainless Steel Plate|
|Authors: ||Patel, VI|
|Issue Date: ||6-Feb-2014|
|Publisher: ||Trans Tech Publications|
|Citation: ||Patel, V. I., Muránsky, O., Hamelin, C. J., Olson, M. D., Hill, M. R., & Edwards, L. (2014). A Validated Numerical Model for Residual Stress Predictions in an Eight-Pass-Welded Stainless Steel Plate. Materials Science Forum, 777, 46-51 doi: http://dx.doi.org/10.4028/www.scientific.net/MSF.777.46|
|Abstract: ||Welding processes create a complex transient state of temperature that results in post-weld residual stresses. The current work presents a finite element (FE) analysis of the residual stress distribution in an eight-pass slot weld, conducted using a 316L austenitic stainless steel plate with 308L stainless steel filler metal. A thermal FE model is used to calibrate the transient thermal profile applied during the welding process. Time-resolved body heat flux data from this model is then used in a mechanical FE analysis to predict the resultant post-weld residual stress field. The mechanical analysis made use of the Lemaitre-Chaboche mixed isotropic-kinematic work-hardening model to accurately capture the constitutive response of the 316L weldment during the simulated multi-pass weld process, which results in an applied cyclic thermo-mechanical loading. The analysis is validated by contour method measurements performed on a representative weld specimen. Reasonable agreement between the predicted longitudinal residual stress field and contour measurement is observed, giving confidence in the results of measurements and FE weld model presented.|
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