scholarly journals Numerical Simulation of Welding Residual Stress Distribution on T-joint Fillet Structure

2012 ◽  
Vol 2 (2) ◽  
pp. 82-91 ◽  
Author(s):  
Se-Yun Hwang ◽  
Jang-Hyun Lee ◽  
Sung-Chan Kim ◽  
Kodakkal Kannan Viswanathan
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Welding Residual Stress

Research on the Residual Stress of Aluminum Alloy (LF6) Welding

2013 ◽  
Vol 546 ◽  
pp. 127-131
Author(s):  
Zhi Qing Guo ◽  
Qiu Juan Lv ◽  
Yan Jiao Li ◽  
Chang Jiang Liu ◽  
Fang Xie
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Experimental Study ◽  
Aluminum Alloy ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Welding Residual Stress ◽  
Welding Seam ◽  
Maximum Value

This paper use the software ANSYS to study the aluminum alloy (LF6) welding residual stress by numerical simulation and experimental study. The result indicates that the aluminum alloy (LF6) has the same residual stress distribution with others, there is a maximum value existing at the range of 4-5mm near the welding seam.

Welding Residual Stress in HDPE Pipes: Measurement and Numerical Simulation

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Yu Sun ◽  
Yun-Fei Jia ◽  
Muhammad Haroon ◽  
Huan-sheng Lai ◽  
Wenchun Jiang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Stress Distribution ◽  
Welded Joints ◽  
Residual Stress Distribution ◽  
Fusion Welding ◽  
Welding Residual Stress ◽  
Hole Drilling ◽  
Radial Depth ◽  
Hdpe Pipes

To understand the residual stress distribution in the welded joints of high density polyethylene (HDPE) pipes is essential to the assessment of its structural integrity. However, limited knowledge of their residual stress was available in this regard. In this paper, the hole-drilling strain-gage method was used to measure the residual stress in the welded seam of HDPE pipes, which was produced by the butt fusion welding technique. The finite element modeling using viscoelastic constitutive model with Prony series was carried out to determine the temperature field and corresponding stress field in the welding stages. The measured residual stress near the surface shows good consistency with the numerical results. It is shown that the residual stress in the hoop direction is much larger than those in the radial and axial directions. The effect of the pipe thickness on the residual stress distribution was also investigated by numerical simulation. The positions of the maximum tensile stress in the welded joints were found within the normalized depth region (the radial depth to the thickness) of 0.2 to 0.8.

scholarly journals Influence of Interlayer Temperature and Welding Sequence on the Temperature Distribution and Welding Residual Stress of the Saddle-Shaped Joint of Weldolet-Header Butt Welding

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5980
Author(s):  
Chunliang Mai ◽  
Xue Hu ◽  
Lixin Zhang ◽  
Bao Song ◽  
Xiongfei Zheng
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Stress Distribution ◽  
High Stress ◽  
Welding Process ◽  
Residual Stress Distribution ◽  
Welding Residual Stress ◽  
Two Stage ◽  
Welding Sequence ◽  
Simulation Results

In this paper, based on Simufact Welding finite element analysis software, a numerical simulation of the temperature and residual stress distribution of the weldolet-header multi-layer multi-pass welding process is carried out, and the simulation results are verified through experiments. The experimental results are in good agreement with the numerical simulation results, which proves the validity of the numerical simulation results. Through the results of the numerical simulation, the influence of the welding sequence and interlayer temperature on the temperature and residual stress distribution at different locations of the saddle-shaped weld was studied. The results show that the temperature and residual stress distribution on the header and weldolet are asymmetric, and the high-stress area of the saddle-shaped welded joint always appears at the saddle shoulder or saddle belly position. When the interlayer temperature is 300 °C, the peak residual stress reaches a minimum of 428.35 MPa. Adjusting the welding sequence can change the distribution trend of residual stress. There is no high-stress area on the first welding side of the two-stage welding path-2. The peak values of residual stresses for continuous welding path-1 and two-stage welding path-2 are 428.35 MPa and 434.01 MPa, respectively, which are very close to each other.

A Probabilistic Evaluation Model for Welding Residual Stress Distribution at Piping Joint in Probabilistic Fracture Mechanics Analysis

2008 ◽  
Author(s):  
Hiroto Itoh ◽  
Jinya Katsuyama ◽  
Kunio Onizawa
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Fracture Mechanics ◽  
Failure Probability ◽  
Evaluation Model ◽  
Residual Stress Distribution ◽  
Welding Residual Stress ◽  
Probabilistic Fracture Mechanics ◽  
Probabilistic Evaluation ◽  
Aging Knowledge

Stress corrosion cracking (SCC) has been observed at some piping joints made by Austenitic stainless steel in BWR plants. In JAEA, we have been developing probabilistic fracture mechanics (PFM) analysis methods for aged piping based on latest aging knowledge and an analytical code, PASCAL-SP. PASCAL-SP evaluates the failure probability of piping at aged welded joints under SCC by a Monte Carlo method. We proposes a simplified probabilistic model which can be applied to the failure probability analysis based on PFM for welded joint of piping considering the uncertainty of welding residual stress. And the probabilistic evaluation model is introduced to PASCAL-SP. A parametric PFM analysis concerning uncertainties of residual stress distribution using PASCAL-SP was performed. The PFM analysis showed that the uncertainties of residual stress distribution largely influenced break probability. The break probability increased with increasing the uncertainties of residual stress.

Effects of Flange Width Ratio on the Residual Stresses in Welded Monosymmetric I-Section

2014 ◽  
Vol 501-504 ◽  
pp. 574-577
Author(s):  
Zhuang Nan Zhang ◽  
Xin Zhao ◽  
Ya Nan Zhao
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Welding Residual Stress ◽  
Width Ratio ◽  
Residual Tensile Stress ◽  
Growth Trend ◽  
Finite Element Software ◽  
Compressive Stresses ◽  
Peak Value

This paper used ANSYS finite element software to simulate the residual stress of the welded monosymmetric I-section and obtain residual stress distribution curves, analyzed the influence of flange width ratio on welding residual stress peak value and the stress distribution. The studies have shown that: with the flange width ratio decrease gradually, peak value of residual stress in flange and web is to increase; peak value of residual tensile stresses in both flange and web close to the steel yield strength fy, peak value of residual compressive stresses is 0.4fy in wide flange and the web near wide flange and in narrow flange and web near narrow flange is 0.3fy; the distribution of the residual tensile stress in the flange and web have growth trend.

scholarly journals Numerical Simulation of Cut Surface Shape and Residual Stress Distribution in Shearing Process

2019 ◽  
Vol 60 (9) ◽  
pp. 1996-2002
Author(s):  
Masaru Fukumura ◽  
Yoshiaki Zaizen ◽  
Takeshi Omura ◽  
Kunihiro Senda ◽  
Yoshihiko Oda
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Surface Shape ◽  
Cut Surface

scholarly journals Numerical Simulation of Cut Surface Shape and Residual Stress Distribution in Shearing Process

2018 ◽  
Vol 59 (688) ◽  
pp. 65-70
Author(s):  
Masaru FUKUMURA ◽  
Yoshiaki ZAIZEN ◽  
Takeshi OMURA ◽  
Kunihiro SENDA ◽  
Yoshihiko ODA
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Surface Shape ◽  
Cut Surface
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