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Communication Dans Un Congrès Année : 1998

3D modeling of unconstrained tools used in hot forging

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Résumé

Unconstrained tools are frequently used in complex forging processes. Their motion is caused by the flow of the workpiece and is a priori unknown. In hot forging the behavior of the part can be described by a viscoplastic, incompressible flow. Applying the virtual work principle to the system (workpiece + tools) the coupled equations determine the velocity/pressure field in the part and the six degrees of freedom of the rigid motion of unconstrained tools. These equations can be numerically solved using a finite element discretization of the velocity/pressure field. The resulting non-linear equations are simultaneously computed by a Newton type linearization and a preconditioned conjugate residual type iterative solver. Applications show the convergence of the solver for the coupled problem and the additional computational cost due the unconstrained tools.
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Dates et versions

hal-00573780 , version 1 (04-03-2011)

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  • HAL Id : hal-00573780 , version 1

Citer

Emmanuel Boyere, Lionel Fourment, Jean-Loup Chenot. 3D modeling of unconstrained tools used in hot forging. 6th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM 98), Jun 1998, Enschede, Netherlands. pp.Pages 553-558. ⟨hal-00573780⟩
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