Fatigue strength of thin laser-hybrid welded full-scale deck structure

Lillemäe, Ingrit; Liinalampi, Sami; Remes, Heikki; Itävuo, Antti; Niemelä, Ari

doi:10.1016/j.ijfatigue.2016.11.012

Cited by 38 publications

(39 citation statements)

References 15 publications

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“…For example, Masubuchi (1980), Smith et al (1988), Ueda (1999), Paik et al (2006), Paik (2007cPaik ( , 2008, , Vhanmane et al (2008), Luís et al (2009), Bruno et al (2011), Khedmati et al (2012), and Teresa et al (2013) provided measurement databases for the initial distortions of aluminum-plated structures; Masubuchi (1980), Smith et al (1988), Cheng et al (1996), Ueda (1999), and Kenno et al (2010Kenno et al ( , 2017 produced measurement databases for the residual stress on steel-plated structures; and Paik et al (2006), Paik (2008), and provided measurement database for residual stresses and the softening of aluminum-plated structures. Eggert et al (2012) and Lillemäe et al (2017) studied the effects of welding-induced residual stresses on the fatigue strength of steel-plated structures. Khan et al (2011), Gannon et al (2012aGannon et al ( , 2012bGannon et al ( , 2015, Farajkhah et al (2016), and Chen et al (2018) also contributed to solving the problem.…”

Section: Introductionmentioning

confidence: 99%

An empirical formulation for predicting welding-induced biaxial compressive residual stresses on steel stiffened plate structures and its application to thermal plate buckling prevention

Hyun

Paik

2018

Ships and Offshore Structures

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The aim of this paper is to derive an empirical formulation for predicting welding-induced biaxial compressive residual stresses in welded steel plate panels. A test database for full-scale models of welded steel plate structures is developed. Elastic-plastic finite element method solutions, associated with thermal stresses in welded steel plate panels, are also developed. The proposed formula is derived by a curve fitting of the databases obtained from both full-scale measurements and numerical computations as a function of plate thickness and weld leg length. The paper demonstrates an applied example of the derived formulations to prevent the thermal buckling of thin steel plate panels that occurs during the welding process.

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Section: Introductionmentioning

confidence: 99%

An empirical formulation for predicting welding-induced biaxial compressive residual stresses on steel stiffened plate structures and its application to thermal plate buckling prevention

Hyun

Paik

2018

Ships and Offshore Structures

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“…Prompted by energy efficiency and fuel economy reasons, the structural lightweight design for large-size structures has been in the spotlight of the recent research in several industrial fields. For instance, modern cruise ships have been designed to accommodate an increased number of cabins and open spaces, thus directing shipbuilding towards new solutions in terms of space and weight in order to increase the performance of the structure [1][2][3][4][5]. Thinwalled structures represent an optimum solution to achieve this design target.…”

Section: Introductionmentioning

confidence: 99%

“…According to Remes et al [4], a visible detrimental effect on the fatigue life of thin-walled marine structures is caused by welding. It has been demonstrated that less severe distortions may be obtained by low-heatinput welding methods such as laser-hybrid welding [1,3,7]. However, in general, the reduced bending stiffness of thin and slender plates leads to complex distortion shapes, and these geometrical imperfections cause a serious increase in stress at fatigue-critical welded joints.…”

Section: Introductionmentioning

confidence: 99%

“…The non-linearity is related to the straightening effect, which causes the stress magnification factor k m to decrease under an increased tensile load. Thus, the definition of the structural stress for welded thin plate structures requires the consideration of the actual distortion shape and geometrical non-linear finite element analysis [3]. Additionally, the previous research pointed out the dominant role of the local angular misalignment α L also in the structural stress definition for full-scale structures, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Stress magnification factor for angular misalignment between plates with welding-induced curvature

et al. 2020

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The construction of lightweight structures poses new design challenges as a result of the different mechanics of deformation experienced by thinner-plated structures. Because of a reduced bending stiffness, thin plates are particularly sensitive to welding-induced distortions, which include a curvature, in addition to the axial and global angular misalignment observed on thick plates. The curvature shape and amplitude determine a local angular misalignment at the welded joint, which causes non-negligible secondary bending effects. Therefore, the commonly used stress magnification factors k m solution for flat plates need a further development to include the curvature effect. This study proposes new analytical formulations, which extend the applicability of the existing solutions to the assessment of the structural stress of a curved thin plate under an axial load. The improved formulations are consistent with the geometrical non-linear finite element analysis under compression (up to ∼ 80% of the buckling limit) and tension (up to the yield strength). A sensitivity analysis is presented in order to show the dominant role of the curvature effect in the estimation of the k m factor. Regardless of the load applied, the presence of the curvature causes a flat plate solution inaccuracy greater than 10% when the local angular misalignment is more than 1.25 times higher than the global angular misalignment in the case of a thin and slender structure.

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“…One prospective measure for suppressing high temperature gradients is inductive preheating or postheating of substrate to an appropriate temperature [6,7]. Inductive heat pretreatment exhibits many benefits such as environmental friendliness, excellent controllability and no influence on the chemical composition of heated material [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Model of depositing layer on cylindrical surface produced by induction-assisted laser cladding process

et al. 2017

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Abstract:A model of hybrid cladding on a cylindrical surface is built and numerically solved. Heating of both substrate and the powder material to be deposited on its surface is realized by laser beam and preheating inductor. The task represents a hard-coupled electromagnetic-thermal problem with time-varying geometry. Two specific algorithms are developed to incorporate this effect into the model, driven by local distribution of temperature and its gradients. The algorithms are implemented into the COM-SOL Multiphysics 5.2 code that is used for numerical computations of the task. The methodology is illustrated with a typical example whose results are discussed.

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Fatigue strength of thin laser-hybrid welded full-scale deck structure

Cited by 38 publications

References 15 publications

An empirical formulation for predicting welding-induced biaxial compressive residual stresses on steel stiffened plate structures and its application to thermal plate buckling prevention

An empirical formulation for predicting welding-induced biaxial compressive residual stresses on steel stiffened plate structures and its application to thermal plate buckling prevention

Stress magnification factor for angular misalignment between plates with welding-induced curvature

Model of depositing layer on cylindrical surface produced by induction-assisted laser cladding process

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