Calculate Residual Stress For Thick Plater With Parallel Technology And Stress Distribution

Welding is a typical steel connection joint, but the Residual stress (RS) is produced by heterogeneous plastic deformations, thermal contractions and phase transformations are induced by the thickness plate manufacturing process. The RS affects the period of construction as well as the period of service. It is reasonable to consider the effects of RS before design and construction.According to plate welding forms, analyzing RS distribution for 40 mm X, V thickness plate by FEM software (ANSYS), and simulating the temperaturefield distribution by inner heat source. Temperature is calculated at first. Then it is applied to the structural model as a load to calculate RS distribution.Research shows that the temperature of nodes in the weld seams reach peak when heat source pass; give the changes value for the physical propertyparameters of the material as the temperature, then can achieve accurate thetemperature field; residual stress in the thickness direction is the minimum andresidual stress values in vertical direction is the largest, and more than the yield strength, this is the result of stress strengthened; in the different constraints,the residual stress under line constrains is less than under area constrains; in the same condition, Than the obvious constraints on the surface in same condition,residual stress of X seam is less than V seam; parallel computing time for thethickness residual stress is relative with network transmission and computersetting.Finally, according to the results of comparative analysis, the thickness residual stress analysis and research provide some recommendations.