On the thermodynamical and variational consistency of cohesize zone models at finite strains
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Cita com:
hdl:2117/183644
Tipus de documentText en actes de congrés
Data publicació2011
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
In the present contribution, the thermodynamical and variational consistency of cohesive zone models is critically analyzed. Starting from cohesive zone models suitable for fully reversible deformation, the restrictions imposed by the second law of thermodynamics are investigated. It will be shown that a naive modeling approach leads to a contradiction of the dissipation inequality, even if a purely elastic response is desired. Based on such findings, a thermomechanically consistent model including dissipative effects is proposed. This model is finally recast into a variationally consistent form. Within the resulting model, all state variables are naturally and jointly computed by minimizing an incrementally defined potential. The predictive capabilities of this model are demonstrated by means of selected examples.
CitacióMosler, J.; Scheider, I. On the thermodynamical and variational consistency of cohesize zone models at finite strains. A: COMPLAS XI. "COMPLAS XI : proceedings of the XI International Conference on Computational Plasticity : fundamentals and applications". CIMNE, 2011, p. 379-384.
ISBN978-84-89925-73-1
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