Fast Computation Based on an Iterative Substructure Method for Three-Dimensional Simulation of Multipass Welding

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Akira Maekawa ◽  
Hisashi Serizawa ◽  
Hidekazu Murakawa
Keyword(s):  
Residual Stress ◽  
Numerical Analysis ◽  
Stress Distribution ◽  
Three Dimensional ◽  
Residual Stress Distribution ◽  
Analysis Method ◽  
Multipass Welding ◽  
Substructure Method ◽  
Measurement Results ◽  
Pipe Joint

An efficient and reliable numerical analysis for three-dimensional (3D) multipass welding simulation is proposed in this paper. A fast analysis method to calculate 3D residual stress distribution in the multipass welds using the iterative substructure method (ISM) was developed and validated using other numerical analysis and measurement results. First, the analysis results by the developed method were compared with those by a conventional method using a commercial finite element analysis code. The comparisons were made for the analysis accuracy and the computational speed of the residual stress analysis in a multipass welded pipe joint. Both sets of analysis results for residual stress agreed well with each other. Furthermore, it was clarified that the developed analysis method could calculate the residual stress in a shorter computing time than the conventional analysis method. Next, the residual stress of the pipe joint computed by the developed analysis method was compared with measurement results obtained using the strain gauge method, and the good analysis accuracy was shown. Consequently, these comparisons demonstrated that the developed method for multipass welding simulation based on the ISM could calculate the residual stress distribution much faster at high analysis accuracy even when the size of the welding problems, such as for multipass welding, was large.

Influence of the Welded Joint on the Mechanical Behavior of Steel Piles during Static and Dynamic Deformation

2007 ◽  
Vol 345-346 ◽  
pp. 1469-1472
Author(s):  
Gab Chul Jang ◽  
Kyong Ho Chang ◽  
Chin Hyung Lee
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Mechanical Behavior ◽  
Welded Joint ◽  
Dynamic Deformation ◽  
Three Dimensional ◽  
Steel Structures ◽  
Residual Stress Distribution ◽  
Dynamic Mechanical Behavior ◽  
Steel Piles

During manufacturing the welded joint of steel structures, residual stress is produced and weld metal is used inevitably. And residual stress and weld metal influence on the static and dynamic mechanical behavior of steel structures. Therefore, to predict the mechanical behavior of steel pile with a welded joint during static and dynamic deformation, the research on the influence of the welded joints on the static and dynamic behavior of steel pile is clarified. In this paper, the residual stress distribution in a welded joint of steel piles was investigated by using three-dimensional welding analysis. The static and dynamic mechanical behavior of steel piles with a welded joint is investigated by three-dimensional elastic-plastic finite element analysis using a proposed dynamic hysteresis model. Numerical analyses of the steel pile with a welded joint were compared to that without a welded joint with respect to load carrying capacity and residual stress distribution. The influence of the welded joint on the mechanical behavior of steel piles during static and dynamic deformation was clarified by comparing analytical results

Residual Stress Distribution of Ceramic-Metal Joint

1989 ◽  
Vol 33 ◽  
pp. 353-362 ◽  
Author(s):  
Masanori Kurita ◽  
Makoto Sato ◽  
Ikuo Ihara ◽  
Akira Saito
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Stress Analysis ◽  
Three Dimensional ◽  
Axial Direction ◽  
Residual Stress Distribution ◽  
X Ray Diffraction ◽  
Copper Sheet ◽  
Brittle Behavior ◽  
Curve Method

AbstractCeramics are sometimes bonded to ductile metals in order to make up for their brittle behavior for industrial use. The residual stress will be induced in ceramics bonded to metals at high temeprature, and it has a strong influence on the strength of ceramic-metal joints. A silicon nitride plate was bonded to a carbon steel plate by brazing to a copper sheet sandwiched between the two materials. The residual stress distribution of the joint specimen was determined by x-ray diffraction using the Gaussian curve method. The measured residual stress distribution almost agreed with that calculated by the three-dimensional thermoelastoplastic stress analysis using FEM, but differed remarkably from that calculated by the two-dimensional stress analysis. This is because a stress concentration occurs at the ceramic-metal interface and the stress distributes three - dimensionally. The stress σx in the axial direction on the surface of the specimen takes maximum values at the center and the edge of the interface.

Effect of Welding Sequence on the Residual Stress Distribution in a Stiffened Plate

2016 ◽  
Author(s):  
Bai-Qiao Chen ◽  
C. Guedes Soares
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Lower Layer ◽  
Plate Thickness ◽  
Three Dimensional ◽  
Welding Process ◽  
Residual Stress Distribution ◽  
Steel Plates ◽  
Tension Zone ◽  
Welding Sequence

This work investigates the temperature distribution, deformation and residual stress in steel plates as a result of different sequences of welding. The single-pass gas tungsten arc welding process is simulated by a three dimensional nonlinear thermo-elasto-plastic approach. It is observed that the distribution of residual stress varies through the direction of plate thickness. It is concluded that the welding sequence affects not only the welding deformation but also the residual stress mainly in the lower layer of the plates. An in-depth discussion on the pattern of residual stress distribution is presented, especially on the width of the tension zone. Smaller residual tension zone and slightly lower compressive stress are found in thicker plate.

scholarly journals Effect of post carburizing treatments on residual stress distribution in plain carbon and alloy steels – a numerical analysis

2020 ◽  
Vol 9 (4) ◽  
pp. 8439-8450
Author(s):  
Pavan Hiremath ◽  
Sathyashankara Sharma ◽  
Gowrishankar M.C. ◽  
Manjunath Shettar ◽  
Gurumurthy B.M.
Keyword(s):  
Residual Stress ◽  
Numerical Analysis ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Alloy Steels

Effect of Friction on Residual Stress Distribution Induced by Split Sleeve Cold Expansion Process

2020 ◽  
Author(s):  
Mithun K. Dey ◽  
Dave Kim ◽  
Hua Tan
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Stress Distribution ◽  
Compressive Residual Stress ◽  
Three Dimensional ◽  
Element Model ◽  
Residual Stress Distribution ◽  
Expansion Process ◽  
Cold Expansion ◽  
Three Dimensional Finite Element

Abstract Residual Stress distribution and parametric influence of friction are studied for the split sleeve cold expanded holes in Al 2024 T351 alloy, by developing a three-dimensional finite element model of the process. Fastener holes in the alloy are necessary for the manufacturing process, but they create a potential area for stress concentration, which eventually leads to fatigue under cyclic loading. Beneficial compressive residual stress distribution as a result of the split sleeve cold expansion process provides retardation against crack initiation and propagation at the critical zones near hole edges. In this parametric study, the influence of friction between contact surfaces of the split sleeve and mandrel is numerically investigated. Hole reaming process after split sleeve cold expansion is often not discussed. Without this post-processing procedure, split sleeve cold expansion is incomplete in practice, and its purpose of providing better fatigue performance is invalidated. This study presents results and an overview of the significance of friction with the consideration of the postprocessing of split sleeve cold expansion. The numerical results show that with increasing friction coefficient, compressive residual stress reduces significantly at the mandrel entry side, which makes the hole edge more vulnerable to fatigue. The different aspects of finite element modeling approaches are also discussed to present the accuracy of the prediction. Experimental residual stress observation or visual validation is expensive and time-consuming. So better numerical prediction with the transparency of the analysis design can provide critical information on the process.

scholarly journals Study on shot peened residual stress distribution under cyclic loading by numerical analysis

2017 ◽  
Vol 35 (2) ◽  
pp. 75s-79s
Author(s):  
Kazuki Ikushima ◽  
Yuji Kitani ◽  
Masakazu Shibahara ◽  
Satoru Nishikawa ◽  
Takashi Furukawa ◽  
...  
Keyword(s):  
Residual Stress ◽  
Numerical Analysis ◽  
Cyclic Loading ◽  
Stress Distribution ◽  
Residual Stress Distribution

Numerical Simulation on Residual Stress Distribution of the Pipe-Plate Welding

2009 ◽  
Vol 417-418 ◽  
pp. 937-940
Author(s):  
Li Li ◽  
Ren Fu Wang ◽  
Gang Xue ◽  
Xiang Jun Min
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Axial Stress ◽  
Three Dimensional ◽  
Good Method ◽  
Residual Stress Distribution ◽  
Welding Residual Stress ◽  
Accurate Estimation ◽  
Element Analysis ◽  
Plate Structure

The pipe-plate welding is a common type of joint in almost all industries. However the presence of residual stresses can be detrimental to the performance of the welded product. Therefore a good method for accurate estimation of the welding residual stress is needed. In this paper, three-dimensional finite element analysis is carried out to simulate pipe-plate structure. Based on the ANSYS software, the residual stress distribution of the pipe-plate structure during welding and after welding is predicted. The calculation results show that the residual stress of weld bead is higher than other places. The radial stress, hoop stress and axial stress are not significantly sensitive to the angle.

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