Analysis of Al-steel resistance spot welding process by developing a fully coupled multi-physics simulation model

Wang, Jin; Wang, Huiping; Lu, Fenggui; Carlson, Blair E.; Sigler, David R.

doi:10.1016/j.ijheatmasstransfer.2015.05.086

Cited by 91 publications

(36 citation statements)

References 33 publications

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“…Do mesmo modo, um processo de soldagem apresenta três conjuntos de parâmetros principais de regulagem, sendo eles: Corrente de soldagem, tempo de soldagem e força, ou pressão, do eletrodo. Estes parâmetros de controle estão presentes em diversos trabalhos que utilizam a RSW, tais como: [45][46][47][48][49][50][51][52][53][54][55][56][57]. Conhecer os fatores controláveis e incontroláveis do processo, bem como configurar adequadamente os parâmetros para a realização do processo de soldagem, favorecem para garantir um bom produto soldado, uma vez que esses fatores impactam na sua geometria e qualidade final [58].…”

Section: Figuraunclassified

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Almeida

Gomes

et al. 2018

Soldag. insp.

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Resumo Neste estudo, buscou-se analisar a variabilidade de instrumentos utilizados na indústria para avaliar as características geométricas de um ponto de solda. Para tal, inicialmente, utilizou-se da técnica de planejamento de experimentos para gerar um arranjo fatorial fracionado para as configurações dos parâmetros de soldagem em corpos de prova de aços galvanizados por imersão a quente, a fim de representar a amplitude real do processo de soldagem por pontos. Para as análises, utilizou-se o estudo de repetitividade e reprodutibilidade (GR&R), pelo método de análise de variância, para identificar os componentes de variação do sistema de medição avaliando três instrumentos distintos, comparando as medições realizadas por um analisador de imagens, a partir do ensaio metalográfico, e métricas de instrumentos convencionais de metrologia como o relógio apalpador e o paquímetro manual. Foram avaliadas duas características da qualidade, sendo elas: a profundidade de indentação e o diâmetro do ponto. A partir dos resultados foi possível verificar que o analisador de imagem apresentou uma menor variabilidade nas medições, caracterizando-se como a melhor escolha para as medições das respostas de qualidade do processo de solda por pontos apresentando um GR&R classificado como aceitável.

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Section: Figuraunclassified

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Almeida

Gomes

et al. 2018

Soldag. insp.

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“…The fluid flow is coupled with (biogeo)chemical reactions, heat transfer, and geomechanical displacement and deformation. Other examples include applications in fusion , fission , fluid–structure interaction , fuel cells , welding , and electric motors . From these examples, we can see that multiphysics problems constitute more complex physical processes than conventionally studied single‐physics phenomena.…”

Section: Introductionmentioning

confidence: 99%

Approaches for mitigating over‐solving in multiphysics simulations

Senecal

2017

Numerical Meth Engineering

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Summary Multiphysics simulations are used to solve coupled physics problems found in a wide variety of applications in natural and engineering systems. Combining models of different physical processes into one computational tool is the essence of multiphysics simulation. A general and widely used coupling approach is to combine several ‘single‐physics’ numerical solvers, each already being well developed, mature/sophisticated into an iteration‐based computational package. This approach iterates over the constituent solvers at every time step, to obtain globally converged solutions. During the simulation, each single‐physics component is solved repeatedly until the feedback has been adequately resolved. However, the component problem solution only needs to be as precise as the feedback that it receives from the other component. Thus, computational effort expended to exceed such precision is wasted. This issue is usually called over‐solving. This paper proposes and discusses several methods that circumvent over‐solving. The residual balance, relaxed relative tolerance, alternating nonlinear, and solution interruption methods are described, and their performance is compared with Picard iteration. A steady state problem with coupling along an interface and a transient problem with two fields coupled throughout the spatial domain are solved as examples. These problems demonstrate that the savings associated with eliminating over‐solving can reach at least 30% without any loss in accuracy. Copyright © 2017 John Wiley & Sons, Ltd.

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“…The present requirements for car weight reduction, have brought new types of steels to automotive industry. Advanced high strength steels (AHSS) have been introduced into vehicle designs in an effort to increase the collision energy management and passenger safety, while maintaining or reducing vehicle weight, which in turn results in a better fuel economy [6][7][8]. Although the use of AHSS in the automotive industry is rapidly increasing, high strength low alloy (HSLA) steel is still predominately used in structural applications for manufacturing automotive parts.…”

Section: Introductionmentioning

confidence: 99%

Optimization of resistance spot welding parameters for microalloyed steel sheets

2016

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Abstract:The paper presents the results of resistance spot welding of hot-dip galvanized microalloyed steel sheets used in car body production. The spot welds were made with various welding currents and welding time values, but with a constant pressing force of welding electrodes. The welding current and welding time are the dominant characteristics in spot welding that affect the quality of spot welds, as well as their dimensions and load-bearing capacity. The load-bearing capacity of welded joints was evaluated by tensile test according to STN 05 1122 standard and dimensions and inner defects were evaluated by metallographic analysis by light optical microscope. The welding parameters of investigated microalloyed steel sheets were optimized for resistance spot welding on the pneumatic welding machine BPK 20.

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Analysis of Al-steel resistance spot welding process by developing a fully coupled multi-physics simulation model

Cited by 91 publications

References 33 publications

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Approaches for mitigating over‐solving in multiphysics simulations

Optimization of resistance spot welding parameters for microalloyed steel sheets

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