Welding deformation analysis based on improved equivalent strain method to cover external constraint during cooling stage

International Journal of Naval Architecture and Ocean Engineering

Tae-Jun Kim¹  Beom-Seon Jang²  Sung-Wook Kang² 

[1] Hyundai Heavy Industries Co., Ltd., Ulsan, Korea;RIMSE, Dept. of Naval Architecture and Ocean Engineering, Seoul National University, Seoul, Korea;

关键词: Welding deformation;    Inherent strain;    FE analysis;    Equivalent strain method;    External constraint;   

DOI  :  10.1515/ijnaoe-2015-0057

来源: DOAJ

【 摘 要 】

In the present study, external restraints imposed normal to the plate during the cooling stage were determined to be effective for reduction of the angular distortion of butt-welded or fillet-welded plate. A welding analysis model under external force during the cooling stage was idealized as a prismatic member subjected to pure bending. The external restraint was represented by vertical force on both sides of the work piece and bending stress forms in the transverse direction. The additional bending stress distribution across the plate thickness was reflected in the improved inherent strain model, and a set of inherent strain charts with different levels of bending stress were newly calculated. From an elastic linear FE analysis using the inherent strain values taken from the chart and comparing them with those from a 3D thermal elasto-plastic FE analysis, welding deformation can be calculated.

【 授权许可】

Unknown