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Communication Dans Un Congrès Année : 1998

3D modeling of unconstrained tools used in hot forging


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)


  • HAL Id : hal-00573780 , version 1


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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