Generation of compressive residual stress at the root of tube-to-tubesheet welded joints in a heat exchanger

Shen, Kuiling; Zhang, Zheng; Jiang, Wenchun; Luo, Yun; Hou-de, SU; Zhang, Yufu

doi:10.1016/j.ijpvp.2022.104848

Cited by 9 publications

(3 citation statements)

References 60 publications

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“…Welded structures are widely applied in marine, automobile, transportation, nuclear, petrochemical, and offshore industries. [1][2][3] After a particular time of service, these structures often experience fatigue problems at welded joints, resulting from repeated or fluctuating stresses.…”

Section: Introductionmentioning

confidence: 99%

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

Liu

Lei

Xing

et al. 2023

Fatigue Fract Eng Mat Struct

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This work provides a post‐processing procedure to predict the high‐ and low‐cycle fatigue life of welded structures. The post‐processor calculates the equivalent structural strain range, given the traction stress state at the weld notch, by enforcing the equilibrium condition and Navier's hypothesis. The return mapping algorithm is applied to deal with the low‐cycle fatigue condition in which through‐thickness plastic deformation develops. The proposed method predicts the fatigue life of 793 welded joints of different configurations made from steel, magnesium, titanium, and aluminum alloy. The predicted high‐ and low‐cycle fatigue lives agree equally well with the experimental result.

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Section: Introductionmentioning

confidence: 99%

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

Liu

Lei

Xing

et al. 2023

Fatigue Fract Eng Mat Struct

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“…Moreover, thin-walled foam-filled tube structures are widely adopted as energy-absorbing devices, owing to their high energy absorption and stable deformation. Recently, much research has focused on the energy absorption of thin-walled foam-filled tube structures with different cross-sectional shapes, including square shapes [1][2][3][4], circular shapes [5][6][7][8], octagonal shapes [9], triangular shapes [10], and other irregular shapes [11,12]. Compared with investigations of the load-bearing ability of circular and square foam-filled tubes, investigations on the load-bearing ability of triangular tubes filled with foam were few.…”

Section: Introductionmentioning

confidence: 99%

Large Deflection of Foam-Filled Triangular Tubes under Transverse Loading

et al. 2023

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In this paper, the large deflection of the foam-filled triangular tube (FFTT) is studied analytically and numerically under transverse loading. Considering the strengths of the foam and the tube, the yield criterion of FFTT is established. Based on the yield criterion, a theoretical model for the large deflection of the clamped triangular tube filled with foam under transverse loading is developed. The numerical simulations are carried out using ABAQUS/Standard software, and the analytical results are compared with the numerical ones. The effects of foam strength, thickness of the tube, and the width of the punch on the load-bearing capacity and energy absorption of the clamped FFTT loaded transversally are discussed in detail. It is demonstrated that the load-bearing ability and the energy absorption increase with increasing foam strength, tube thickness, and punch width. The closer the loading position is to the clamped end, the greater the increases in the capacity of load bearing and the energy absorption of the triangular tube filled with foam. The theoretical model can be used to foresee the large deflection of metal FFTT under transverse loading.

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“…Due to the uniform heating and cooling during welding, the welding residual stresses are generated unavoidably. Welding residual stresses are the main reason resulting in stress corrosion cracking (SCC) [4,5]. Reducing residual stresses can depress the risk to occur SCC, and even enhance the creep [6,7] and fatigue lives [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness

Zhang

Xie

Luo

2023

Metals

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Local post-weld heat treatment is used to reduce welding residual stresses. The existing standards have great differences in the selection of the width of the heated band, and the heating width, as an important control parameter of the local heat treatment, will directly affect the quality of the heat treatment. In this paper, the numerical simulation method is used to simulate the welding and heat treatment process of unequal-thickness joints. The stress and deformation of the joint with different thickness ratios under different heating widths are studied by finite element simulation, focusing on the influence of the width of the heated band on the residual stress relief of the joint. Based on these studies, the criteria for determining the optimal width of the heating zone are consistent. Finally, the formula HB=HB1+HB2=3RT+1+k2RT for calculating local heat treatment heating width based on the thickness of welded joint for SA738Gr.B steel is established. Among them, HB1 is the width of the main heating zone, HB2 is the width of the auxiliary heating zone, k is the thickness ratio of the thick plate to the thin plate, and t is the wall thickness of the thin plate.

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Generation of compressive residual stress at the root of tube-to-tubesheet welded joints in a heat exchanger

Cited by 9 publications

References 60 publications

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

Large Deflection of Foam-Filled Triangular Tubes under Transverse Loading

A Uniformed Calculation Criterion on Heat Band Width of Local PWHT on Welded Joint with Dissimilar Thickness

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