Numerical investigation on residual stress distribution and evolution during multipass narrow gap welding of thick-walled stainless steel pipes

Liu, C.; Zhang, J.X.; Xue, Caihong

doi:10.1016/j.fusengdes.2011.01.116

Cited by 84 publications

(29 citation statements)

References 23 publications

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“…It can be deduced that the tendency of the stress is similar to that of the strain. The tendency is basically in line with works of others [18, 19].…”

Section: Curved Grating Transition Technique and Gpa Technology Applisupporting

confidence: 91%

GPA Combined with the Hole‐Drilling Method Applied for Curved Surface Strain Measurement

Liu

Zhou

et al. 2012

Strain

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This paper describes three methods that were modified and combined to investigate the residual strain of a curved surface. First, the traditional grating transfer method previously only applied to a flat surface was extended to a curved surface using a new fabrication and transition approach. Second, the GPA method previously only applied in the nanoscopic field was extended to the macroscopic field. Third, both of the above methods were combined with the hole‐drilling method to obtain deformation information on the plane analysing grating. The data obtained were used to analyse the in‐plane residual strain by the GPA method, and an algorithm that can use the plane analysing grating data was used to calculate the curved specimen grating deformation. The feasibility and reliability of these methods were verified by using them to measure and analyse the residual strain of a welded joint on a stainless steel tube.

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“…It can be deduced that the tendency of the stress is similar to that of the strain. The tendency is basically in line with works of others [18, 19].…”

Section: Curved Grating Transition Technique and Gpa Technology Applisupporting

confidence: 91%

GPA Combined with the Hole‐Drilling Method Applied for Curved Surface Strain Measurement

Liu

Zhou

et al. 2012

Strain

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“…In order to demonstrate the multi-pass welding numerically, the elements representing the filler metal in the groove were deactivated before the welding, and when the weld bead was deposited, the corresponding elements were activated [12]. The heat input was set as the volumetric heat sources and the outdoor temperature was assumed to be the room temperature.…”

Section: Methods For Analysismentioning

confidence: 99%

“…Although there have been many reports about the welding residual stress after the multi-pass welding with narrow gap [3,[7][8][9][10][11][12][13], the shrinkages of gap width in the early stage of welding passes have not been examined precisely since this deformation is largely affected by the welding conditions such as heat input, geometry of structures, restraint condition, and so on [5,6]. During the multi-pass welding, the restraint condition changes with increasing the passes so that the restraint in the early stage of welding passes is considered to be small and the welding distortion would be influenced by the geometry of the gap.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of deformation in early stage of multi-pass circumferential dissimilar welding of thick-walled pipes with narrow gap

2016

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Three-dimensional thermal elastic-plastic finite element analyses were conducted in order to reveal the mechanism of gap shrinkage in early stage of multi-pass narrow gap welding of thick-walled dissimilar pipes and thick plates. The gap shrinkage up to the 8th pass indicates that the shrinkage of plates becomes to be much larger than that of pipes with increasing the weld passes. In addition, through the decomposition of gap shrinkage to transverse shrinkage and angular distortion, it is found that the gap shrinkage of pipes is mainly governed by the transverse shrinkage, while the shrinkage of plates is influenced by both the transverse shrinkage and angular distortion. Moreover, the serial computational results with various groove shapes suggest that the transverse shrinkage of pipes almost linearly increases with increasing the weld pass, and its increment can be predicted by a linear approximation function obtained by the transverse shrinkage of plates regardless of the groove shape.

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“…Liu ve ark. [5] yapmış oldukları çalışmada kaynakla yapılan boru bağlantılarında artık gerilmelerin, dış ve iç yüzeylerde kaynak bölgesi ve kaynağa yakın bölgelerde oluştuğunu tespit etmişlerdir. Korozyondan kaynaklanan ve kaynakla yapılan bağlantı ve tamir işlemlerinde oluşan bu olumsuz ve istenmeyen durumlar, bilim adamlarını farklı materyallere, birleştirme ve tamir tekniklerine yönlendirmiştir.…”

Section: Introductionunclassified

Hasar Gören Galvani̇zli̇ Borularin Epoksi̇ Esasli Yapiştirici İle Tami̇ratinda Boru Yama Geometri̇si̇ İle Boru Patlama Basinci Arasindaki̇ İli̇şki̇ni̇n İncelenmesi̇

Şahan¹

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZBu çalışmanın amacı iç basınca maruz hasarlı galvanizli boruların epoksi esaslı yapıştırıcı ile tamirinde en uygun yama açılarının ve bindirme uzunluklarının tespit edilmesidir. Hasarlı borular, borularda oluşturulan çatlakların yapıştırma bağlantıları tekniği ile tamiratı için en uygun yama geometrisinin tespit edilmesi amacıyla farklı geometrideki yamalar kullanılarak epoksi yapıştırıcı ile tamir edilmiştir. Farklı boyutlardaki yamalarla tamiratı yapılmış galvanizli izotropik borular iç basınç testlerine tabi tutulmuş ve boru patlama basınçları elde edilmiştir. Boru patlama mukavemetleri ayrıca ANSYS yazılımı ile elde edilmiş ve deneysel ve nümerik değerlerler karşılaştırmalı olarak verilmiştir. Bu çalışmada, elde edilen deneysel ve sayısal sonuçlar birbirlerine çok yakın olarak ortaya çıkmıştır. Bu çalışma ile yama bindirme açılarının ve yama bindirme uzunluklarının boru patlama basıncı üzerindeki etkileri deneysel ve nümerik olarak ortaya konmuştur.Anahtar Kelimeler: Boru, çatlak, iç basınç, sonlu elemanlar, yapıştırıcı INVESTIGATION OF THE RELATIONSHIP BETWEEN PATCH GEOMETRY AND PIPE EXPLOSION PRESSURE IN THE REPAIR OF DAMAGED GALVANIZED PIPES WITH EPOXY ADHESIVE ABSTRACTThe purpose of this study is to determine the most suitable patch angles and trap lengths for repairing damaged galvanized pipes exposed to internal press using epoxy-based adhesive. Damaged pipes are repaired using adhesive bonding technique. Patches were used in different geometries to determine the optimal patch geometry for this repair. Galvanized isotropic pipes repaired using different geometries were subjected to internal pressure tests and pipe explosion pressures were obtained. Pipe explosion pressures were also determined by ANSYS analyzes and experimental and numerical values were given comparatively. In this study, the experimental and numerical results obtained have emerged as very close to each other. With this study, the effects of patch overlap angles and patch overlays on pipe explosion pressures have been presented experimentally and numerically.

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Numerical investigation on residual stress distribution and evolution during multipass narrow gap welding of thick-walled stainless steel pipes

Cited by 84 publications

References 23 publications

GPA Combined with the Hole‐Drilling Method Applied for Curved Surface Strain Measurement

GPA Combined with the Hole‐Drilling Method Applied for Curved Surface Strain Measurement

Finite element analysis of deformation in early stage of multi-pass circumferential dissimilar welding of thick-walled pipes with narrow gap

Hasar Gören Galvani̇zli̇ Borularin Epoksi̇ Esasli Yapiştirici İle Tami̇ratinda Boru Yama Geometri̇si̇ İle Boru Patlama Basinci Arasindaki̇ İli̇şki̇ni̇n İncelenmesi̇

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