Article (Scientific journals)
A numerical study of hypoelastic and hyperelastic large strain viscoplastic Perzyna type models
Careglio, Claudio; Canales Cardenas, Cristian; García Garino, Carlos et al.
2016In Acta Mechanica
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Keywords :
Viscoplasticity; Large strains; Constitutive formulations; Hypoelasticity; Hyperelasticity
Abstract :
[en] For the case ofmetalswith large viscoplastic strains, it is necessary to define appropriate constitutive models in order to obtain reliable results from the simulations. In this paper, two large strain viscoplastic Perzyna type models are considered. The first constitutive model has been proposed by Ponthot, and the elastic response is based on hypoelasticity. In this case, the kinematics of the constitutive model is based on the additive decomposition of the rate deformation tensor. The second constitutive model has been proposed by García Garino et al., and the elastic response is based on hyperelasticity. In this case, the kinematics of the constitutive model is based on the multiplicative decomposition of the deformation gradient tensor. In both cases, the resultant numerical models have been implemented in updated Lagrangian formulation. In this work, global and local numerical results of the mechanical response of both constitutive models are analyzed and discussed. To this end, numerical experiments are performed and different parameters of the constitutive models are tested in order to study the sensitivity of the resultant algorithms. In particular, the evolution of the reaction forces, the effective plastic strain, the deformed shapes and the sensitivity of the numerical results to the finite element mesh discretization have been compared and analyzed. The obtained results show that both models have a very good agreement 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 > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
García Garino, Carlos
Mirasso, Anibal
Ponthot, Jean-Philippe  ;  Université de Liège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Language :
English
Title :
A numerical study of hypoelastic and hyperelastic large strain viscoplastic Perzyna type models
Publication date :
January 2016
Journal title :
Acta Mechanica
ISSN :
0001-5970
eISSN :
1619-6937
Publisher :
Springer Wien, Vienna, Austria
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 July 2016

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