|Reference : Three-Dimensional Large Starin Elasto-Viscoplastic Constitutive Model.|
|Scientific congresses and symposiums : Paper published in a book|
|Engineering, computing & technology : Mechanical engineering|
|Three-Dimensional Large Starin Elasto-Viscoplastic Constitutive Model.|
|Ribero, Melisa |
|Careglio, Claudio |
|Garcia Garino, Carlos |
|Mirasso, Anibal |
|Ponthot, Jean-Philippe [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]|
|Proceedings of MECOM 2012, Mecanica Computational Vol XXXI|
|MECOM 2012, Mecanica Computational|
|13-16 November 2012|
|[en] finite elements ; large strains ; elasto viscoplasticity|
|[en] In a previous work, J. Ponthot et al., Mec Comput, XXIV:441-454 (2005), have extended a
large strain elastoplastic constitutive model based on hyperelasticity and multiplicative decomposition of deformation gradient tensor, to viscous case based on a contribution of the same main author . In this way a very useful tool has been obtained, able to deal with both rate dependent and rate independent
In this work a brief review of theoretical details is presented and numerical implementation of the
model in a three-dimensional finite element code (SOGDE3D) is performed. The finite element code was developed for solving elastoplasticity in solids under large strains in three-dimensional space. A Newton Raphson scheme has been used to solve the non-linear consistency condition in order to compute the viscoplastic multiplier.
An analysis of large viscoplastic deformation problems under plane strain condition are provided in order to test the proposed model. A comparison between two and three-dimensional versions of SOGDE code is achieved to validate the implementation and some results available in the literature helped to confirm the correct recovery of elastoplastic response by the viscoplastic model.
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