Journal ArticleDOI
Thermomechanics of the cooling stage in casting processes : three-dimensional finite element analysis and experimental validation
Michel Bellet,Florent Decultieux,Mamar Ménaï,François Bay,Christophe Levaillant,Jean-Loup Chenot,Pål Schmidt,Ingvar L Svensson +7 more
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In this paper, a thermomechanical finite element analysis of solidification is presented based on a multidomain analysis accounting for non-coincident meshes for the cast part and the different mold components.Abstract:
A thermomechanical three-dimensional (3-D) finite element analysis of solidification is presented. The heat transfer model is based on a multidomain analysis accounting for noncoincident meshes for the cast part and the different mold components. In each subdomain, a preconditioned conjugate gradient solver is used. The mechanical analysis assumes the mold is rigid. A thermoelastic-viscoplastic rheological model is used to compute the constrained shrinkage of the part, resulting in an effective local air gap width computation. At each time increment, a weak coupling of the heat transfer and mechanical analyses is performed. Comparisons of experimental measurements and model predictions are given in the case of a hollow cylindrical aluminum alloy part, showing a good quantitative agreement. An application to an industrial aluminum casting is presented, illustrating the practical interest of thermomechanical computations in solidification analysis.read more
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Journal ArticleDOI
Numerical simulation of filling and solidification of permanent mold castings
Sergey V. Shepel,Samuel Paolucci +1 more
TL;DR: In this article, the filling and solidification of a casting of an automotive piston produced from an aluminum alloy was modeled by using the volume-of-fluid method, and the model provided a solution of acceptable accuracy despite some uncertainty in material properties and boundary and initial conditions.
Journal ArticleDOI
ALE method for solidification modelling
TL;DR: In this article, an arbitrary Lagrangian-Eulerian (ALE) formulation has been developed for the simulation of casting processes, which can provide accurate free surface description, and to the study of thermo-mechanical phenomena occurring in the subsequent cooling down of cast parts: prediction of solute transport and of distortions and stresses.
Journal ArticleDOI
A model of the interfacial heat-transfer coefficient during unidirectional solidification of an aluminum alloy
TL;DR: In this paper, a model for the prediction of the interfacial heat transfer coefficient during the unidirectional solidification vertically upward of an Al-7 wt pct Si alloy cast onto a water cooled copper chill is presented.
Journal ArticleDOI
Finding boundary conditions: A coupling strategy for the modeling of metal casting processes: Part I. Experimental study and correlation development
TL;DR: In this article, a generalized temperature boundary condition coupling strategy for the modeling of conventional casting processes was implemented via experiments and numerical simulations with commercial purity aluminum, aluminum alloy, and tin specimens in copper, graphite, and sand molds.
Book ChapterDOI
Object-oriented programming for “fast and easy” development of parallel applications in forming processes simulation
Hugues Digonnet,Thierry Coupez +1 more
TL;DR: The usefulness of object-oriented programming to avoid recruiting parallel experts to develop physical applications and examples of interface classes implemented in two different software that allow the development of parallel applications by the common developer are discussed.
References
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Journal ArticleDOI
The Constitutive Equations for Rate Sensitive Plastic Materials
TL;DR: In this article, the authors generalize one-im ion ion l con itutive equitives for r te-sensi ive plastic materials to general sta s of s ress.
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