Contribution à l'implémentation de lois de comportement sous Plaxis. Cas des matériaux visqueux

The objective of this work is to provide a contribution to the programming of rheological laws and implement them on dynamic design standard code such as PLAXIS through a DLL "Dynamic Link Library". The first task is to understand and master the technique of dynamic programming through DLLs (using a programming language under Windows platform). In order to be familiarized with this technique, we started by implementing simple laws such as linear elastic isotropic model and linear elastic orthotropic model, in a drained and undrained situation. In order to predict the behavior of viscous materials, we programmed Lemaitre's viscoplastic law for creep computation, as well as the implementation the viscoplastic relationship of law of Koppejan modified. These laws were validated by modeling a series of simulation tests, which were then compared with existing models or with analytical solution reference. [PUBLICATION ABSTRACT]