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Theses

Simulation numérique de l'endommagement ductile en formage de pièces massives

Abstract : In this work, a simplified and useful industrial numerical methodology is proposed in order to simulate bulk metal forming processes with ductile damage occurrence. This allows to “optimize” the process plan in order to avoid (or minimize) the damage occurrence when we look to obtain an undamaged part; or to enhance the damage occurrence in order to simulate any metal cutting operation. The proposed methodology uses a simple thermo-(visco)plastic constitutive equations (Prandtl-Reuss) “weakly” or “strongly” coupled with a simple ductile damage model (CDM). The local time integration of the coupled constitutive equations is performed iteratively using the implicit Newton-Raphson algorithm. The initial and boundary value problem associated with the global equilibrium is also solved using a static implicit Newton-Raphson scheme. The consistent tangent stiffness matrix is then derived including the damage effect. Many simple and industrial bulk metal forming processes have been simulated in order to show how the numerical methodology in well working. The obtained results are very convincing from both qualitative and quantitative point of view
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https://tel.archives-ouvertes.fr/tel-00004667
Contributor : Jean-François Mariage <>
Submitted on : Thursday, April 1, 2004 - 10:47:34 AM
Last modification on : Monday, September 16, 2019 - 4:35:58 PM
Long-term archiving on: : Monday, September 20, 2010 - 11:42:57 AM

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  • HAL Id : tel-00004667, version 2

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CNRS | P2MN | UTT

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Jean-François Mariage. Simulation numérique de l'endommagement ductile en formage de pièces massives. Autre. Université de Technologie de Troyes, 2003. Français. ⟨tel-00004667v2⟩

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