A validated thermo mechanical FEM model of bead-on-plate welding

Darmadi, Djarot B.; Norrish, John

doi:10.1504/ijmpt.2014.059047

Cited by 9 publications

(9 citation statements)

References 24 publications

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“…The isotherms due to the mobile, continuous, three-dimensional thermal source show the evolution during times t2 (s) of 0, 1, 5, 35, 200, and 400 s. At time t2(s) = 5 s, the thermal source is completely inside the solid, and the temperature reaches 2450 K, in the center of the melt pool, a result very similar to other studies. At time t2(s) = 35 s, the thermal source is not completely inside the solid any longer, and there is a significant reduction in temperature, again agreeing with the results from other studies, for example (SHEN et al, 2017) and (DARMADI; KIET-TIEU;NORRISH, 2014).…”

Section: Resultssupporting

confidence: 89%

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Tremarin

Pravia

2020

Lat. Am. j. solids struct.

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This work presents a new computational approach to estimate the fatigue life in welded joints, taking into account three-dimensional, non-proportional, and out-of-phase stresses; the thermomechanical properties of steel; parameters of the welding process; and the effects of residual stresses. We use the mechanical equations of continuous and cumulative fatigue damage found from Multiaxial RainFlow, the Wang and Brown and critical plane methods, and the Findley criteria approach. The numerical finite element method, available with software, is used to simulate the formation of residual stress and quantify its influence by solving equations. Based on the analysis of numerical results, we were able to prevision the crack location and angles of propagation of a high cycle fatigue crack with totally random loads in a metallic structure. We conclude that the result of the computational method is valid and can be used to estimate and life in fatigue in welded joints.

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Section: Resultssupporting

confidence: 89%

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Tremarin

Pravia

2020

Lat. Am. j. solids struct.

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“…Finally, for all the cases, we have noticed for the same rate loading and the same temperature as the residual stresses increase in absolute value when the crack evolves to until reaching a maximum absolute value for a length 13 mm then to become constant for crack length greater than this value. This phenomenon is also studied by finite element method prediction of residual stresses generation and temperature histories measurement [8,19]. Figure 13.…”

Section: Results and Interpretationmentioning

confidence: 99%

“…So, Molano et al [17] have studied thermomechanical treatment effects on residual stress generation. Another, the effect of thermal properties and weld efficiency on residual stresses in welding have been studies by Armentani et al [18,19]. However, the fatigue strength improvement is due to the combined effect of residual compressive stress and the work hardening [20].…”

Section: Introductionmentioning

confidence: 99%

Residual Stress Generation at Crack Tip under Thermomechanical Effects of Aluminum Alloy 2024-T3: Numerical Modelisation

Kebir¹,

Benguediab²,

Bouamama³

et al. 2020

ACSM

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The residual stresses which result from the manufacture are present in the mechanical part with absence of any external force, but also they can be generated by various procedures. These stresses are the result of incompatibilities of deformation related to the heterogeneity of the plastic strain. Therefore, as the crack propagated in the residual stress field, the distribution of residual stresses is changed. The purpose of this work is to generate the thermomechanical residual stresses on along direction of crack propagation using a numerical simulation by Ansys software. This numerical approach allows us to evaluate the thermomechanical relaxation of the compressive residual stresses induced by plastic strain at crack tip.

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“…In a study using numerical simulation and experimental validation, authors concluded that longitudinal and circumferential stresses performed on the inner and outer surfaces and the radial direction revealed a considerable increase in weld speed and power [14]. Darmadi et al utilised a mixed heat source model, which gave a well-matched temperature distribution and weld pool shape [15]. A mathematical model of a double ellipsoidal moving heat source has been used to simulate the transient thermal analysis by finite element method [16].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2021

brod

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Hard-facing process is widely used for improving the wear resistance of mild steel. During the application of hard-facing, due to high temperatures, residual stresses and deformations may occur. The tensile residual stresses may cause crack propagation on the hard-faced part. The purpose of this study is to utilise minimum computer work for minimizing these residual stresses and deformations during the hard-facing of mild steel. The fully coupled transient heat transfer and structural analysis was performed for calculations. The double-ellipsoidal moving heat source was utilised to simulate the heat input from the gas metal arc welding (GMAW). Only eight numerical simulations were performed to minimize the computer work; the grey relational analysis was used for minimizing both the residual stresses and deformations. Welding speed, welding current, and welding pattern were considered as changing parameters. At the end of the numerical and statistical solutions, it is observed that heat input should be kept minimum to minimize the stresses and deformations. But it is obvious that the heat input must provide a temperature greater than the melting point. Straight patterns always produce better results for minimizing stresses and deformations. Transverse stress at the beginning and end of the longitudinal path gets higher significantly after cooling. Cooling does not affect the total deformation.

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A validated thermo mechanical FEM model of bead-on-plate welding

Cited by 9 publications

References 24 publications

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Residual Stress Generation at Crack Tip under Thermomechanical Effects of Aluminum Alloy 2024-T3: Numerical Modelisation

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