PREDICTION OF WELDING DEFORMATIONS BY FEM BASED ON INHERENT STRAINS

Welding deformations can be predicted by inherent strains that are assumed to be distributed in the welds and nearby area. This method is more convenient compared with the thermo elasto plastic finite element method because only elastic analysis is necessary. The problem is how to know the inherent strains in advance during deformation analysis. The relations between inherent strains and welding parameters based on some experimental curves and a 3 D FEM model were introduced. According to this study, the longitudinal and transverse inherent strains that are the most important factors on welding deformations can be determined. The effectiveness of the proposed methods is demonstrated through the deformation analysis of a large welded cylinder with multipass welds as an example.

ASME“U”钢印资格认证有关问题的探讨

介绍ASME资格认证程序,详细阐述ASME认证应注意的设计制造方面问题,明确焊缝系数和用于壁厚计算中的焊接接头系数的区别,以及进行联合检查时,设计工程师应注意的几个方面的问题。