Simulation of forming processes, using the arbitrary eulerian-lagrangian formulation

Schreurs, Pjg Piet; Veldpaus, F.E.; Brekelmans, W.A.M.

doi:10.1016/0045-7825(86)90076-9

Cited by 59 publications

(29 citation statements)

References 14 publications

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“…The punch moves down and penetrates the specimen, resulting in constantly changing boundary conditions. To deal with these dif®cult boundary conditions and the localised large deformations, the FEM application that we used, combines three numerical procedures: the commercial implicit package MARC [26] (using an updated Lagrange formulation), an Arbitrary Lagrange± Euler approach [27,28] and an automatic adaptive remeshing algorithm [17,25], to overcome severe mesh distortion problems. This model was experimentally validated prior to fracture on both deformation ®elds Ð using digital image correlation Ð and process forces, using a planar blanking set-up [19,20].…”

Section: Blankingmentioning

confidence: 99%

Evaluation of ductile fracture models for different metals in blanking

Goijaerts

Govaert

Baaijens

2001

Journal of Materials Processing Technology

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This study is focussed on the evaluation of ductile fracture methodologies, which are needed to predict product shapes in the blanking process. In an earlier publication [Goijaerts et al., J. Manuf. Sci. Eng., Trans. ASME 122 (2000) 476], two approaches were elaborated using local ductile fracture models. The ®rst strategy incorporates the characterisation of a ductile fracture model in a blanking experiment. The second methodology is more favourable for industry. In this approach, instead of a complex and elaborate blanking experiment, a tensile test is used to characterise a newly proposed criterion, which was shown to predict accurately the ductile fracture for different loading conditions. In this paper, ®nite element simulations and experiments are performed on both tensile testing and blanking to evaluate the validity of both approaches with corresponding criteria for ®ve different metals. In the blanking process, different clearances as well as different cutting radii of the tools are considered. In conclusion, it can be stated that the ®rst approach gives very good results close to, or within the experimental error for all ®ve materials. The second approach, the more favourable one for industry, yields good results that deviate slightly more over the range of metals. #

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Section: Blankingmentioning

confidence: 99%

Evaluation of ductile fracture models for different metals in blanking

Goijaerts

Govaert

Baaijens

2001

Journal of Materials Processing Technology

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“…Later, the extension towards nonlinear solids has been made [8]. In forming processes, the ALE method has proven successful [9,10]. More recently, the extension towards localisation analyses has been made [11,12].…”

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confidence: 99%

Adaptive analysis of yield line patterns in plates with the arbitrary Lagrangian–Eulerian method

Askes

Ferran

Huerta

1999

Computers & Structures

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“…The discretization by FEM of Equation 1.2 leads to solving a linear system: (Schreurs et al (1986)) Schreurs et al (1986) arrived at the following conclusions: the Pseudo Young's modulus E has no impact on mesh deformation since all elements have the same value and the Pseudo Poisson's ratio ν does influence the distortion of the mesh for values of : 0 ≤ ν < 0.5.…”

Section: Pseudo-structural Methods (Psm) Reviewmentioning

confidence: 99%

“…The first to have come up with the idea of modelling a moving mesh in an ALE reference frame as a pseudo material is Schreurs et al (1986). This article introduces that physical mesh and moving mesh should share connectivities (see Figure 1.1) and that the pseudo or fictitious material behaviour is similar to an isotropic linearly elastic material.…”

Section: Pseudo-structural Methods (Psm) Reviewmentioning

confidence: 99%

Robust moving-mesh algorithms for hybrid stretched meshes: Application to moving boundaries problems

Landry

Soulaïmani

Luke

et al. 2016

54th AIAA Aerospace Sciences Meeting

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ACKNOWLEDGEMENTSI would like to express my gratitude:• To my thesis supervisor Azzeddine Soulaïmani Ph.D., Eng. Professor Soulaïmani has given me the chance to explore a complex subject with freedom and trust. I have also gained a lot from his mentoring, reputation, experience and our long discussions for which I am truly grateful;• To Amine Ben Haj Ali Ph.D. for his help on defining the test cases and his experiences in meshing generation;• To Professor Edward Luke Ph.D. who shared with us his mesh-mover algorithm which was crucial to generate great results and study deeper the subject of moving boundaries problems;• To Aziz Madrane Ph.D. for his recommendation on the use of the ADT search algorithm.Also, a special thanks to the École de technologie supérieure for entrusting me the excellence scholarship which allowed me to dedicate my energy completely to this research with the support of this growing institution.I dedicated this work to my dear fiancée Alicia who allowed me to push myself every day and to produce proudly this thesis thanks to her love and her motivation; à ma mère Colette, mon père Georges, mon frère Nicholas et ma soeur Maude pour leur soutien inconditionnel; to all my friends who have help me grow; and to Botas and Rizpita whom entertain me during my redaction. MÉTHODES ROBUSTES DE MOUVEMENT DE MAILLAGES HYBRIDES: APPLICATION AUX PROBLÈMES DE FRONTIÈRES MOBILESJonathan LANDRY RÉSUMÉ L'objectif principal de ce mémoire est de développer un Algorithme de Mouvement de Maillage (AMM) suffisament robuste qui sera capable d'adapter les maillages de la majorité des problèmes de frontières mobiles. Ainsi, une nouvelle méthodologie est implémentée à partir de la meilleure combinaison provenant d'algorithmes connus dans le but de mieux préserver la qualité des maillages initiaux.Dans la majorité des simulations, les AMMs standards sont capables de déplacer le maillage en conservant une bonne qualité de maillage, toutefois quand le mouvement est complexe et/ou qu'il y a une interaction multi-corps ils génèrent des maillages invalides. Alors, la nouvelle approche est constituée de trois algorithmes: la fonction pondérée de la distance inverse (PDI) pour produire le champ de déplacements, les algorithmes de lissages de la Méthode de Transformation Géométrique d'Élément (MéTGÉ) pour améliorer la qualité du maillage résultant et un nouvel algorithme basé sur la MéTGÉ qui est capable de réparer les maillages invalides. Il a été prouvé qu'avec cette méthodologie des problèmes de frontières mobiles très difficiles peuvent être résolus.L'approche proposée a été démontrée efficace pour adapter les maillages de différentes situations aéroélastiques réalistes: une aile symétrique a subi une grande flexion et une grande torsion induites au bout de l'aile; et les dispositifs hypersustentateurs de deux ailes (une rectangulaire et une avec une flèche) ont été déplacés vers différentes positions de vol.Finalement, il a été prouvé qu'avec la méthode proposée, la majorité des maillages pour les problèmes d'IFS peuvent ê...

show abstract

Simulation of forming processes, using the arbitrary eulerian-lagrangian formulation

Cited by 59 publications

References 14 publications

Evaluation of ductile fracture models for different metals in blanking

Evaluation of ductile fracture models for different metals in blanking

Adaptive analysis of yield line patterns in plates with the arbitrary Lagrangian–Eulerian method

Robust moving-mesh algorithms for hybrid stretched meshes: Application to moving boundaries problems

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