Viscoplasticity; Perzyna; Large strains; Hypoelasticity; Hyperelasticity
Abstract :
[en] A large strain elasto-viscoplastic Perzyna model was proposed by Ponthot. The resultant numerical model computes the elastic response using an hypoelastic model. A viscoplastic multiplier was proposed, then both inviscid (elastoplastic) and elastic limiting cases can be easily recovered. More recently the authors have included this viscoplastic model in a large strain constitutive model based on hyperelasticity and multiplicative decomposition of deformation gradient tensor. In this work a brief summary of both, hypoelastic and hyperelastic based large strain models of viscoplasticity is provided. Large strain examples are simulated in order to test the discussed models. Different parameters of the constitutive model are tested in order to study the sensitivity of the resultant algorithm. From the obtained results can be said that both models show a very good agree and represent very well the characteristic of the viscoplastic constitutive model.
Disciplines :
Mechanical engineering
Author, co-author :
Careglio, Claudio
Canales Cardenas, Cristian ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Ribero, Melisa
García Garino, Carlos
Mirasso, Anibal
Ponthot, Jean-Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Language :
English
Title :
A large strain elasto-viscoplastic numerical model
Publication date :
2014
Event name :
14th Pan-American Congress of Applied Mechanics - PACAM XIV
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