scholarly journals Numerical simulation of strain localization in multi-pass welded joints with account of residual stresses

2014 ◽  
Author(s):  
Raisa A. Krektuleva ◽  
Oleg I. Cherepanov ◽  
Roman O. Cherepanov
Keyword(s):  
Numerical Simulation ◽  
Residual Stresses ◽  
Strain Localization ◽  
Welded Joints

Finite Element Analyses of Residual Stresses in Typical Welded Joints Used in Nuclear Power Plants and Comparisons With Experiments

2010 ◽  
Author(s):  
Dean Deng ◽  
Kazuo Ogawa ◽  
Nobuyoshi Yanagida ◽  
Koichi Saito
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Residual Stresses ◽  
Welded Joints ◽  
Nuclear Power ◽  
Power Plants ◽  
Butt Joint ◽  
Welding Residual Stress ◽  
Dissimilar Metal ◽  
Water Reactors

Recent discoveries of stress corrosion cracking (SCC) at nickel-based metals in pressurized water reactors (PWRs) and boiling water reactors (BWRs) have raised concerns about safety and integrity of plant components. It has been recognized that welding residual stress is an important factor causing the issue of SCC in a weldment. In this study, both numerical simulation technology and experimental method were employed to investigate the characteristics of welding residual stress distribution in several typical welded joints, which are used in nuclear power plants. These joints include a thick plate butt-welded Alloy 600 joint, a dissimilar metal J-groove set-in joint and a dissimilar metal girth-butt joint. First of all, numerical simulation technology was used to predict welding residual stresses in these three joints, and the influence of heat source model on welding residual stress was examined. Meanwhile, the influence of other thermal processes such as cladding, buttering and heat treatment on the final residual stresses in the dissimilar metal girth-butt joint was also clarified. Secondly, we also measured the residual stresses in three corresponding mock-ups. Finally, the comparisons of the simulation results and the measured data have shed light on how to effectively simulate welding residual stress in these typical joints.

Numerical simulation of residual stresses in aluminum alloy welded joints

2020 ◽  
Vol 50 ◽  
pp. 380-393 ◽  
Author(s):  
Yaohui Lu ◽  
Shengchang Zhu ◽  
Zhitang Zhao ◽  
Tianli Chen ◽  
Jing Zeng
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Residual Stresses ◽  
Welded Joints

scholarly journals Numerical Simulation of Residual Stresses in Linear Friction Welded Joints

2015 ◽  
Vol 8 (6) ◽  
pp. 49-53 ◽  
Author(s):  
R. Nikiforov ◽  
◽  
A. Medvedev ◽  
E. Tarasenko ◽  
A. Vairis ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Residual Stresses ◽  
Welded Joints ◽  
Linear Friction

Numerical Simulation of Residual Stresses in Multipass Gas Metal Arc-Welded Joints of Thick Aluminum Alloy Plates

2019 ◽  
Vol 28 (6) ◽  
pp. 3361-3371
Author(s):  
Fengyuan Shu ◽  
Lei Wu ◽  
Yuxin Liu ◽  
Yaohui Lv ◽  
Ting Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Residual Stresses ◽  
Welded Joints

scholarly journals Numerical simulation of laser welded joints: modern fatigue analysis methodology

2020 ◽  
Vol 53 (4) ◽  
pp. 342-355
Author(s):  
Rami Markus Kokko ◽  
Joona Vaara ◽  
Teemu Kuivaniemi ◽  
Tero Frondelius
Keyword(s):  
Numerical Simulation ◽  
Cyclic Loading ◽  
Residual Stresses ◽  
Welded Joints ◽  
Fatigue Cracks ◽  
Fatigue Behaviour ◽  
Noticeable Effect ◽  
Microstructural Changes ◽  
Analysis Methodology ◽  
Simulation Results

Welding always induces discontinuities and imperfections in the structure that allows for potential fatigue cracks. Welding effects thermal strains, which yield to residual stresses of the structure that have a noticeable effect on the fatigue behaviour of the structure. Welding inexorably leads to microstructure and geometry changes in the welding region. Material internal changes, residual stresses and microstructural changes can be simulated numerically, and the simulation results can be used in cyclic loading analysis in FEA.

Numerical Simulation of Residual Stress in the Glass-to-Metal Diffusion Seals

2008 ◽  
Vol 575-578 ◽  
pp. 666-671 ◽  
Author(s):  
Di Xu ◽  
Xiang Ling
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Welded Joints ◽  
Thermal Power ◽  
Diffusion Welding ◽  
Finite Element Software ◽  
Metal Diffusion ◽  
Metal Seal

The glass-to-metal seals are widely used in the solar thermal power. When a glass-to-metal seal is cooled in the process of diffusion welding, the residual stresses are generated due to different thermal contraction between the two materials. The residual stresses built up along the interface near the end of the seal can induce welded joints to crack and decrease the fatigue intensity of the welded joints and thus are of technical importance. In order to obtain the residual stresses existed in the diffusion welded joints, the glass-to-metal vacuum diffusion sealing process were simulated by using finite element software ABAQUS. Furthermore, the influences of temperature, time, vacuum, and seal pressure on the strength of the glass-to-metal diffusion welding were analyzed. The optimization of the diffusion welding process parameter based on the simulation of the residual stress and analysis of the micro-structure and the macro-mechanical performance of the diffusion welded seals was carried out. The distribution of residual stress on the surface of the glass-to-metal joint caused by welding is measured by X-ray diffraction method, and compared with the result of the numerical simulation to prove the validation of the finite element model.

Numerical simulation of low-cycle fatigue behavior of welded joints for naval applications: influence of residual stresses

2017 ◽  
Vol 61 (3) ◽  
pp. 551-561 ◽  
Author(s):  
B. Levieil ◽  
F. Bridier ◽  
C. Doudard ◽  
D. Thevenet ◽  
S. Calloch ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Residual Stresses ◽  
Welded Joints ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue

Numerical simulation and experimental validation of angular distortion and residual stresses in a T-joint

2015 ◽  
Vol 57 (7-8) ◽  
pp. 628-634
Author(s):  
Jing Chen ◽  
Liying Wang ◽  
Zhendong Shi ◽  
Zhen Dai ◽  
Meiqing Guo
Keyword(s):  
Numerical Simulation ◽  
Residual Stresses ◽  
Experimental Validation ◽  
Angular Distortion
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