Development of idealized explicit FEM using GPU parallelization and its application to large-scale analysis of residual stress of multi-pass welded pipe joint

Ikushima, Kenji; Itoh, Shinsuke; Shibahara, Masakazu

doi:10.1007/s40194-015-0235-2

Cited by 12 publications

(7 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although computational speed has been increased using graphical processing units, parallel computation with multiprocessors in desktop workstations, and supercomputers (Refs. [94][95][96], it still could take days and weeks to analyze a large welded structure to predict distortion using a transient moving-arc TMM analysis method for one welding sequence.…”

Section: Simplified and Fast Analysis Methodsmentioning

confidence: 99%

Recent Advances in the Prediction of Weld Residual Stress and Distortion - Part 1

Yang¹

2021

View full text Add to dashboard Cite

Residual stresses and distortions are the result of complex interactions between welding heat input, the material’s high-temperature response, and joint constraint conditions. Both weld residual stress and distortion can significantly impair the performance and reliability of welded structures. In the past two decades, there have been many significant and exciting developments in the prediction and mitigation of weld residual stress and distortion. This paper reviews the recent advances in the prediction of weld residual stress and distortion by focusing on the numerical modeling theory and methods. The prediction methods covered in this paper include a thermo-mechanical-metallurgical method, simplified analysis methods, friction stir welding modeling methods, buckling distortion prediction methods, a welding cloud computational method, integrated manufacturing process modeling, and integrated computational materials engineering (ICME) weld modeling. Remaining challenges and new developments are also discussed to guide future predictions of weld residual stress and distortion.

show abstract

Section: Simplified and Fast Analysis Methodsmentioning

confidence: 99%

Recent Advances in the Prediction of Weld Residual Stress and Distortion - Part 1

Yang¹

2021

View full text Add to dashboard Cite

show abstract

“…Determination of K coefficients for various concentrators represented by drilled cracks is performed either by well-known dependencies, or by the results of solving the corresponding problems with the methods of the two-dimensional elasticity theory, or experimentally [1,3,[23][24][25][26][27][28][29].…”

Section: Theoretical Modelsmentioning

confidence: 99%

Performance assurance of mechanical engineering construction in the existence of cracks

2019

View full text Add to dashboard Cite

The purpose of this paper is to consider the development of engineering ways of preventing the further development of through cracks in the sheet elements of the complex technical structures. The latest individual approach to the assessment and assurance of performance of structures with cracks, which is to take into account the features of their operation, has been applied in this work. Preference is given to methods that reduce the concentration in the danger zone. Studies have shown that the most appropriate and effective ways to prevent the further development of a through crack are the structural methods and combinations of the structural and technological methods. The effectiveness of these methods was determined on the basis of the strength uniformity approach of structural elements with a crack. The criterion of strength uniformity from the position of fatigue and brittle strength with an error on the safe side is the value of theoretical stress concentration factor ] [K . The ] [K value was made on the basis of generalization and analysis of cases of crack formation, the results of tests of typical components of hull structures and welded joints. The safe concentration of stresses near the holes of various purposes in the members of the machine-building structures is in the range from 2 to 4. Taking into account the relevant requirements for the ratio of the radius of curvature and the width of the cutout, we obtain 3.5. The value of the criterion К1 is determined by the ratio of the calculated crack length to the diameter of the hole drilled at its ends and the location of the crack.

show abstract

“…When ISM is applied to welding deformation problems, the model is divided into a strong nonlinear region around the weld pool and a weak non-linear region [9,10]. Recently, parallel computation methods using graphical processing units (GPU) have been utilized to accelerate computation speed for welding deformation prediction [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

Kang

Yun

Kim³

et al. 2021

Materials

View full text Add to dashboard Cite

As the environmental pollution issue has recently become significant, environmental regulations in Europe and the United States are being strengthened. Thus, there is a demand for the quality improvement of emission after-treatment systems to satisfy the strengthened environmental regulations. Reducing the amount of welding heat distortion by optimization of the welding order of each part could be a solution for quality improvement since the emission after-treatment system consists of many parts and each assembly is produced by welding individual ones. In this research, a method to derive a welding sequence that effectively minimizes welding deformation was proposed. A two-stage simulation was performed to obtain the optimal welding sequence. In the first stage, the welding sequence was derived by analyzing the number of welding groups in each assembly of a structure. The derived welding sequence was verified by performing a thermal elasto-plastic analysis and comparing it with the experimental results.

show abstract

Development of idealized explicit FEM using GPU parallelization and its application to large-scale analysis of residual stress of multi-pass welded pipe joint

Cited by 12 publications

References 12 publications

Recent Advances in the Prediction of Weld Residual Stress and Distortion - Part 1

Recent Advances in the Prediction of Weld Residual Stress and Distortion - Part 1

Performance assurance of mechanical engineering construction in the existence of cracks

A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

Contact Info

Product

Resources

About