Finite Element Simulation of Welding Distortion in Dissimilar Joint by Inherent Deformation Method

Farajpour, Mehdi; Ranjbarnodeh, Eslam

doi:10.1590/0104-9224/si2301.07

Cited by 19 publications

(9 citation statements)

References 9 publications

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“…A modelagem numérica começa com a especificação da geometria da malha, Figura 3. Para que a análise numérica do modelo construído fornecesse um campo de maior precisão da temperatura e gradiente térmico foi utilizado elementos finitos com malha fina na proximidade da fonte de energia térmica e na parte onde está localizada a poça de fusão, Figura 3b, já na região mais afastada do centro da solda os elementos finitos foram maiores, pois o gradiente térmico é menor e com menor sensibilidade [14,16,18]. Para a análise térmica, os dados determinados experimentalmente foram utilizados para calibrar as fontes de calor da simulação.…”

Section: Resultados E Discussõesunclassified

Análise da zona afetada pelo calor em soldagem dupla camada utilizando o método dos elementos finitos

2020

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RESUMO A técnica de soldagem dupla camada utiliza método controlado de deposição, onde a relação entre os aportes térmicos da segunda para a primeira camada de solda (E2/E1) deve ser criteriosamente definida para promover o refino dos grãos da Zona Afetada pelo Calor (ZAC). Entretanto, a parametrização de processos de soldagem para a realização desta técnica tem sido de modo experimental, requerendo diversos ensaios, corpos de prova e consumíveis, demandando tempo e elevado custo. Uma possível solução para tal problemática é a análise computacional aplicada à soldagem, tornando o estudo desta de grande relevância. Este trabalho objetiva o estudo inicial do comportamento da ZAC em soldagem dupla camada utilizando o Método de Elementos Finitos (MEF). Experimentos práticos foram realizados para comparar e validar o modelo numérico. Dessa maneira, seis corpos de prova foram fabricados, três com camada simples e três com dupla camada. Foram utilizadas três energias de soldagem diferentes para os primeiros passes (0.571, 0.428 e 0.342 kJ/mm) e o dobro de tais energias para o segundo passe (taxa de energia de 1:2). Comparou-se as macrografias dos resultados experimentais e numéricos, tanto para a camada simples quanto para a dupla camada, bem como realizou-se a medição das dimensões da ZAC ao longo da seção transversal dos corpos de prova. Dessa maneira, notou-se que a taxa de energia de 1:2 é suficiente para atingir a zona de grãos grosseiros da primeira camada. Ainda, os resultados macrográficos e as medições das ZAC apresentaram ótima convergência entre as análises experimental e numérica, validando o modelo proposto.

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Section: Resultados E Discussõesunclassified

Análise da zona afetada pelo calor em soldagem dupla camada utilizando o método dos elementos finitos

2020

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“…The thermal properties of mild steel were taken from previous studies (Farajpour and Ranjbarnodeh, 2018). Convection and radiation heat transfer was considered from exterior surfaces of the butt weld joint (those surfaces that are in contact with surroundings) in the FEM model.…”

Section: Methodsmentioning

confidence: 99%

Experimental, analytical and numerical, investigation of peak temperature and cooling rate in butt joint weld of mild steel

Singh

Meena

Arora

et al. 2021

WJE

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Purpose This paper aims to measure peak temperatures and cooling rates for distinct locations of thermocouples in the butt weld joint of mild steel plates. For experimental measurement of peak temperatures, K-type thermocouples coupled with a data acquisition system were used at predetermined locations. Thereafter, Rosenthal’s analytical models for thin two-dimensional (2D) and thick three-dimensional (3D) plates were adopted to predict peak temperatures for different thermocouple positions. A finite element model (FEM) based on an advanced prescribed temperature approach was adopted to predict time-temperature history for predetermined locations of thermocouples. Design/methodology/approach Comparing experimental and Rosenthal analytical models (2D and 3D) findings show that predicted and measured peak temperatures are in close agreement, while cooling rates predicted by analytical models (2D, 3D) show significant variation from measured values. On the other hand, 3D FEM simulation predicted peak temperatures and cooling rates for different thermocouple positions are close to experimental findings. Findings The inclusion of filler metal during simulation of welding rightly replicates the real welding situation and improves outcomes of the analysis. Originality/value The present study is an original contribution to the field of welding technology.

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“…The results of the inherent deformation method utilizing 4-node shell elements are compared with those obtained by a traditional model using 9-node strong components. Although the former method minimized the necessary storage (and hence the time and expense of the analysis), comparisons with experimental observations confirmed that both methods can be used to model DMW with similar efficacy [47]. A study investigated the residual stress in the dissimilar joint from AISI 304 and Monel 400.…”

Section: 1 Study On Nonferrous Welding Simulationsmentioning

confidence: 99%

Dissimilar Non-Ferrous Metal Welding: An Insight on Experimental and Numerical Analysis

Devaraj

Ziout

Qudeiri

2021

Metals

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In recent years Gas Metal Arc Welding (GMAW) technology has expanded its functionalities in various areas which have further motivated its usage in several emerging manufacturing industries. There are several issues and challenges associated with this technology, especially in dissimilar metal welding (DMW). One of the predominant challenges is selecting appropriate welding parameters which influence the efficiency of this technology. To explore several modern advancements in this expertise, this paper has done an exclusive survey on various standards of GMAW and its variants for selecting suitable parameters for welding dissimilar nonferrous metals. This review summarizes various experimental and numerical results along with related illustrations to highlight the feasibility of welding dissimilar nonferrous metals using traditional GMAW and investigations on advanced GMAW processes such as cold metal transfer (CMT) and pulsed GMAW (P-GMAW). Simulation and modeling of nonferrous DMW have identified several research gaps and modeling problems. Researchers and manufacturers can use this review as a guideline to choose appropriate welding parameters to implement GMAW and its variants for non-ferrous dissimilar welding. It found that by controlling the heat input and effective post-heat treatments, adequate joint properties can be achieved. Automated large -scale manufacturing will widen the utilization scope of GMAW and avoid some costly methods such as laser welding, ultrasonic welding, and friction stir welding etc.

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Finite Element Simulation of Welding Distortion in Dissimilar Joint by Inherent Deformation Method

Cited by 19 publications

References 9 publications

Análise da zona afetada pelo calor em soldagem dupla camada utilizando o método dos elementos finitos

Análise da zona afetada pelo calor em soldagem dupla camada utilizando o método dos elementos finitos

Experimental, analytical and numerical, investigation of peak temperature and cooling rate in butt joint weld of mild steel

Dissimilar Non-Ferrous Metal Welding: An Insight on Experimental and Numerical Analysis

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