Effect of Weld on Axial Buckling of Cylindrical Shells

2010 ◽  
Vol 139-141 ◽  
pp. 171-175 ◽  
Author(s):  
Zhou Fang ◽  
Zhi Ping Chen ◽  
Chu Lin Lu ◽  
Ming Zeng
Keyword(s):  
Residual Stress ◽  
Critical Stress ◽  
Cylindrical Shells ◽  
Welding Process ◽  
Circumferential Welds ◽  
Axial Buckling ◽  
Oil Storage ◽  
Stress And Deformation ◽  
Welding Processes ◽  
Residual Stress And Deformation

Large oil storage tank (oil tank for short) shells are vulnerable to buckling damage when suffering the seismic loads. Numerical simulation analysis was taken to estimate the effects of the weld form, number and their location to axial buckling stress of cylindrical shells, considering not only the characteristic of welding processes, but also the effects probably caused by magnitude of residual stress and deformation on elephant foot buckling to oil tanks. It is revealed that the existence of circumferential welds had obvious negative effect on axial buckling critical stress compared with the structure without welds, while the effects of weld number and location were not as much; longitudinal welds had no visible effect on axial buckling critical stress; controlling the residual stress and deformation range caused by circumferential welds should be the key point during the tanks welding process.

Research of Weld on Axial Buckling Stress of Multilayer Combined Cylindrical Shells

2010 ◽  
Author(s):  
Chulin Yu ◽  
Zhiping Chen ◽  
Licai Yang
Keyword(s):  
Residual Stress ◽  
Critical Stress ◽  
Buckling Analysis ◽  
Welding Residual Stress ◽  
Analysis Method ◽  
Axial Buckling ◽  
Oil Tank ◽  
Stress And Deformation ◽  
Oil Tanks ◽  
Residual Stress And Deformation

Large welded steel tanks for oil storage (oil tank for short in following text) are usually constructed by welding together several varying thickness cylindrical shells. The generated welding residual stress and deformation may affect the buckling behavior of oil tanks. Learning the influence of welding residual stress and deformation on axial buckling helps accounting for discrepancy between elephant’s foot buckling critical stress and classic theoretical solution. A buckling analysis method considering welding residual stress and deformation is established. Inherent strain finite element method is illustrated as the proper method to simulate welding residual stress and deformation in buckling analysis and its detail setting procedures in ABAQUS are given. A small model cylinder is analyzed under three conditions (one circumferential weld only, one meridian weld only, and one circumferential weld with two meridian welds), leading to several important conclusions. One of these conclusions is that the extent to which welding residual stress and deformation reduces axial buckling critical stress depends on the weld type greatly. Then the established buckling analysis method is applied to an actual oil tank with patterned welds. Result shows that patterned welds decrease axial buckling critical stress significantly. At last several recommendations are given to decrease the effect of welding residual stress and deformation on axial buckling of oil tanks.

3-D numerical evaluation of residual stress and deformation due welding process using simplified heat source models

2015 ◽  
Vol 29 (1) ◽  
pp. 341-348 ◽  
Author(s):  
Amir Hossein Eslampanah ◽  
Mohammad Ebrahim Aalami-aleagha ◽  
Saeid Feli ◽  
Mohammad Reza Ghaderi
Keyword(s):  
Residual Stress ◽  
Heat Source ◽  
Numerical Evaluation ◽  
Welding Process ◽  
Source Models ◽  
Stress And Deformation ◽  
Residual Stress And Deformation

Numerical Simulation for Residual Stress and Deformation of Surface Welding on Membrane Water-Wall

2014 ◽  
Vol 490-491 ◽  
pp. 594-599
Author(s):  
Fan Ling Meng ◽  
Ai Guo Liu
Keyword(s):  
Residual Stress ◽  
Great Influence ◽  
Residual Deformation ◽  
Welding Residual Stress ◽  
Finite Element Software ◽  
Welding Sequence ◽  
Surface Welding ◽  
Stress And Deformation ◽  
Welding Sequences ◽  
Residual Stress And Deformation

Automatic MIG was adopted to weld Inconel 625 alloy on 20 G Membrane Waterwall, which can improve the capacities of high temperature corrosion resistance and wear resistance. To study the influence of Membrane Waterwall surface welding sequences on residual stress and residual deformation, this paper utilized finite element software ABAQUS and segmented moving heat source model to simulate the sequence welding, balanced welding from the middle to sides, balanced welding from sides to the middle, balanced skip welding from middle to sides and balanced skip welding from sides to the middle and studied their residual stresses and deformations. The simulation results indicated that there was a great influence of welding sequences on the residual stress and deformation. The optimal welding sequence was balanced skip welding from middle to sides and balanced skip welding from sides to the middle, which could change the stress distribution, decrease the welding residual stress by 17%, realize the even deformation of the whole welding section and decrease the bending deformation by 50%.

scholarly journals Influence of Welding Sequence on Welding Residual Stress and Deformation of Lateral Stop

2019 ◽  
Vol 55 (24) ◽  
pp. 57
Author(s):  
LIU Yang ◽  
JIANG Bin ◽  
WANG Huizi ◽  
AN Bo ◽  
YANG Xinhua
Keyword(s):  
Residual Stress ◽  
Welding Residual Stress ◽  
Welding Sequence ◽  
Stress And Deformation ◽  
Residual Stress And Deformation

Welding Analysis using Residual Stress and Deformation Generated During Cutting of Plate Structure

2021 ◽  
Vol 30 (4) ◽  
pp. 308-315
Author(s):  
Hee-Chan Yoon ◽  
Hong-Jun Noh ◽  
Young-Hwan Han ◽  
Hun-Bong Lim ◽  
Hyun-Ik Yang
Keyword(s):  
Residual Stress ◽  
Plate Structure ◽  
Stress And Deformation ◽  
Residual Stress And Deformation
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