Simulation of Welding Deformation and Residual Stress

2015 ◽  
Vol 84 (1) ◽  
pp. 66-74
Author(s):  
Masahito MOCHIZUKI ◽  
Yoshiki MIKAMI ◽  
Shigetaka OKANO ◽  
Masakazu SHIBAHARA
Keyword(s):  
Residual Stress ◽  
Welding Deformation

Study on Welding Deformation and Residual Stress of H-Section Beam Based on Finite Element Method

2017 ◽  
Vol 753 ◽  
pp. 305-309 ◽  
Author(s):  
Xu Lu
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Finite Element ◽  
Source Parameters ◽  
Welding Process ◽  
Steel Structure ◽  
Bottom Plate ◽  
Welding Deformation ◽  
Element Simulation ◽  
Main Components

The welding H-section beam has good mechanical properties with its superior structure. So they become the main components of steel structure and have been widely used. In this paper, the welded H-section beam is used as the research object. The finite element simulation model is established. The heat source parameters are determined. The deformation of the steel due to the welding process is studied. The results show that the bottom plate and the bottom plate inward bending is about 2.32mm cause by welding process. The residual stress can reach 400MPa.

scholarly journals Influence of Mesh Size on Welding Deformation and Residual Stress of Lap Joints

2018 ◽  
Vol 1087 ◽  
pp. 042085
Author(s):  
Yuanbin Fang ◽  
Shuanlao Dong ◽  
Huadong Jia ◽  
Xinwei Dong ◽  
Hao Cheng
Keyword(s):  
Residual Stress ◽  
Mesh Size ◽  
Lap Joints ◽  
Welding Deformation

Million-Finite-Element-Order Large-Scale Computation of Residual Stress in Complicated Weld Structures

2010 ◽  
Author(s):  
Masahito Mochizuki ◽  
Shinsuke Itoh
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Large Scale ◽  
Base Plate ◽  
Computational Method ◽  
Element Order ◽  
Welding Deformation ◽  
Weld Distortion ◽  
Steam Separator ◽  
Reactor Internals

Shroud head in a steam separator of ABWR is connected to more than 300 pipes, which are attached by fillet welds. Although the welding causes welding deformation, it is impossible to correct this deformation to the shroud head because the shroud head material is very thick; more than 50 mm. Thus, it is necessary to clarify the mechanism of welding deformation so that it can be quantitatively predicted and controlled. SCC prevention is also essential by residual stress control in reactor internals. The objective of this paper is to predict welding deformation and residual stress for a shroud head, and to investigate the influence of factors such as the inclination angle of the base plate, to which the pipes are connected, on welding deformation and residual stress. Million-finite-element-order large-scale computational method of residual stress and weld distortion has been developed in order to apply directy to complicated weld structures. Details of algorithm and some applications are introduced.

An Experimental Study on Improved Production Process of Large-Diameter Cylinder Assembly

2013 ◽  
Vol 427-429 ◽  
pp. 200-203
Author(s):  
Hui Fan Zeng
Keyword(s):  
Residual Stress ◽  
Large Diameter ◽  
Aging Treatment ◽  
Dimensional Accuracy ◽  
Welding Residual Stress ◽  
Production Cycle ◽  
Welding Deformation ◽  
Residual Stress State ◽  
Deformation Law ◽  
Large Cylinder

Post-welding annealing and aging treatment are commonly used to reduce welding residual stress and post-welding deformation. However, both show their limited effect in the application of large workpieces. Present study attempts to explore the residual stress state and post-welding deformation law of large workpieces by improving the production technology of the important workpieces of certain engineering equipment a large cylinder assembly. It is proposed that the deformation induced by post-welding residual stress can be effectively compensated by increasing the dimensional accuracy in cutting processing. In this way, aging process is replaced and qualified products can be obtained in a much shorter production cycle.

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