Numerical simulation of residual stresses in aluminum alloy welded joints

Lü, Yaohui; Sheng-chang, Zhu; Zhao, Zhitang; Chen, Tianli; Zeng, Jing

doi:10.1016/j.jmapro.2019.12.056

Cited by 69 publications

(22 citation statements)

References 14 publications

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“…The development of fatigue approaches that account for the effect of residual stresses induced by the arc welding process is a topic of increasing interest not only in the scientific literature but also in the industrial context [1][2][3][4][5]. For this purpose, numerical simulations aimed at predicting residual stress distributions due to the welding process [6][7][8][9][10][11][12][13][14][15][16] should be as reliable as possible, but they must also be rapid to meet industrial needs. In this context, Okano et al [17] recently performed a finite element (FE) simulation by coupling weld mechanics and the arc plasma process and obtained a good agreement between numerically calculated residual stress fields and experimental measurements carried out using the X-ray diffraction method.…”

Section: Introductionmentioning

confidence: 99%

Residual Notch Stress Intensity Factors in Welded Joints Evaluated by 3D Numerical Simulations of Arc Welding Processes

et al. 2021

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Approaches based on calculating Residual Notch Stress Intensity Factors (R-NSIFs) assume the weld toe to be a sharp V-notch that gives rise to a residual singular stress distribution close to the weld toe. Once R-NSIFs are determined, they might be included in local fatigue criteria for the structural strength assessment of welded joints based on NSIFs due to external cyclic loading. However, the numerical calculation of R-NSIFs through finite element (FE) simulations of the welding process requires extremely refined meshes to properly capture the residual stress singularity. In this context, the Peak Stress Method (PSM) has recently been adopted to estimate R-NSIFs due to residual stresses by means of coarse meshes of 2D 4-node plane or 3D 8-node brick elements. The aim of this work is to investigate the applicability of the PSM to estimate R-NSIFs in a butt-welded joint using coarse meshes of 3D 10-node tetra elements. The R-NSIF distribution at the weld toe line is estimated by applying the PSM to coarse meshes of 3D 10-node tetra elements, and the results are in agreement with those obtained using 3D 8-node brick elements. Accordingly, the PSM based on tetra elements further enhances the rapid estimation of R-NSIFs using coarse meshes and could be effective in analyzing complex 3D joint geometries.

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Section: Introductionmentioning

confidence: 99%

Residual Notch Stress Intensity Factors in Welded Joints Evaluated by 3D Numerical Simulations of Arc Welding Processes

et al. 2021

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“…After the field of residual stresses is estimated, this field can be used for further analysis in a number of ways. For instance, the entire pre-stressed structure can be simulated using so-called "inherent strain" method [21] or F 0 -approach [40]. This study presents a continued development of the mentioned F 0 -approach.…”

Section: Introductionmentioning

confidence: 99%

Combined experimental/theoretical approach to residual stresses within multiplicative elasto-plasticity

Tagiltsev¹,

Shutov²

2021

Preprint

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The study is devoted to geometrically non-linear modelling of viscoplastic structures with residual stresses. We advocate and develop a special approach to residual stresses based on the transition between reference configurations. The finite strain kinematics of the viscoplastic material is modelled by the multiplicative decomposition of the deformation gradient tensor. Numerical algorithms originally developed for unstressed materials are extended to materials with pre-stresses. Owing to the weak invariance of constitutive equations, the incorporation of pre-stresses happens without additional costs. Thus, the advocated approach is especially efficient. A novel experimental/theoretical method for assessment of residual stresses in welded structures is presented; the method combines advantages of purely experimental and theoretical approaches. To demonstrate the applicability of the proposed procedure, we simulate plate welding. As an example we show that the procedure allows to extrapolate the filed of residual stresses away from the measurement points.As another example, we address the reduction of weldment-related residual stresses by mechanical treatment.

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“…Analytical approach of Arbitrary Lagrangian and Eulerian (ALE) was employed to enhance the previous idea of updated Lagrange [15]. In recent decades, generally speaking, 2D/3D thermo-mechanical coupling simulation has seen the application in lightweight alloys (aluminum and magnesium alloys) and steels [16][17][18][19][20], but the study in the field of refractory metal is still relatively small, especially the development of molybdenum sheet [21][22]. Compared with UHR, although the deformation pattern of CHR is similar to that of it, the transition of rolling direction makes the field state exchange dramatically, and the difference of mechanical properties in both vertical and horizontal orientations is also compensated apparently.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Large Plastic Deformation Process of Pure Molybdenum Plate During Hot Rolling

Peng

Cheng

Xing

et al. 2021

Preprint

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Rare molybdenum resources have been increasingly involved in heavy industries. In this paper, the common unidirectional and cross hot rolling operations, for pure molybdenum plate, are numerically simulated by using MSC. Marc software. An elastic-plastic finite element model is employed together with updated Lagrange method to predict stress and strain fields in the work-piece. The results showed that there was a typical three-dimensional additional compressive stress ( σy > σx > σz ) in deformation zone, while strain could be divided into uniaxial compressive strain and biaxial tensile strain ( Ey > Ex > Ez ). Tensile stress σx increased with the accumulation of reduction and the decrease of friction coefficient at the edge of width spread. More importantly, the interlaced deformation caused by cross commutation was helpful to repair the severe anisotropy created by unidirectional hot rolling. By comparing the theoretical verification of rolling forces and the measured temperatures with the simulated values, eventually, it is demonstrated that the model is aligning well with the actual engineering.

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Numerical simulation of residual stresses in aluminum alloy welded joints

Cited by 69 publications

References 14 publications

Residual Notch Stress Intensity Factors in Welded Joints Evaluated by 3D Numerical Simulations of Arc Welding Processes

Residual Notch Stress Intensity Factors in Welded Joints Evaluated by 3D Numerical Simulations of Arc Welding Processes

Combined experimental/theoretical approach to residual stresses within multiplicative elasto-plasticity

Finite Element Analysis of Large Plastic Deformation Process of Pure Molybdenum Plate During Hot Rolling

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