[en] Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in order to describe the constitutive law for the frictional case. Following a standard plasticity approach to Coulomb law a non-symmetric tangent operator is found, and so a non-symmetric solver has to be used in order to take full advantage of consistent operators. With respect to symmetric ones, these non-symmetric operators lead to prohibitive computational times. However, in practice different schemes have been proposed in order to recover the symmetric operator, and consequently, use a symmetric solver. In this work an alternative approach based on an idea due to Garcia Garino and Oliver [33] is defined in order to avoid to deal with non-symmetric solvers and thus save a large amount of computational time, which renders the computational simulation more attractive to industry. Applications to metal forming simulations and crashworthiness analysis are envisaged.
Disciplines :
Mechanical engineering
Author, co-author :
Garcìa Garino, C.; Instituto Tecnologico Universitario, UNC, Mendoza, Argentina
Ponthot, Jean-Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Boman, Romain ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Oliver, J.; Instituto Tecnologico Universitario, UNC, Mendoza, Argentina
Language :
English
Title :
A Quasi-Coulomb Model for Frictional Contact Interfaces
Publication date :
September 1999
Event name :
MECOM99 - 6th Argentine Congress on Computational Mechanics
Event place :
Mendoza, Argentina
Event date :
September 6-10, 1999
Audience :
International
Main work title :
MECOM'99 - Proceedings of the 6th Argentine Congress on Computational Mechanics
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