Article (Scientific journals)
On the use of large time steps with an energy momentum conserving algorithm for non-linear hypoelastic constitutive models
Noels, Ludovic; Stainier, Laurent; Ponthot, Jean-Philippe
2004In International Journal of Solids and Structures, 41 (3-4), p. 663–693
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Keywords :
energy-momentum conserving; dynamics; hypoelastic constitutive model; large strain plasticity; finite elements
Abstract :
[en] This paper presents an extension of the energy momentum conserving algorithm, developed by the authors for hypoelastic constitutive models. For such a material, contrarily to hyperelastic models, no potential can be defined, and thus the conservation of the energy is ensured only if the elastic work of deformation can be restored by the scheme. In a previous paper, we proposed a new expression of internal forces at the finite element level which is shown to verify this property. We also demonstrated that the work of plastic deformation is positive and consistent with the material model. In this paper, the second order terms that were neglected in the previous work are now taken into account. Several numerical applications are presented to demonstrate the necessity of taking these terms into account once large time step sizes are used. The limitations of the Newmark algorithm in the non-linear range are also illustrated. (C) 2003 Elsevier Ltd. All rights reserved.
Disciplines :
Mechanical engineering
Author, co-author :
Noels, Ludovic  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Milieux continus et thermomécanique
Stainier, Laurent ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Milieux continus et thermomécanique
Ponthot, Jean-Philippe  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Language :
English
Title :
On the use of large time steps with an energy momentum conserving algorithm for non-linear hypoelastic constitutive models
Publication date :
2004
Journal title :
International Journal of Solids and Structures
ISSN :
0020-7683
eISSN :
1879-2146
Publisher :
Pergamon-Elsevier Science Ltd, Oxford, United Kingdom
Volume :
41
Issue :
3-4
Pages :
663–693
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 July 2008

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