Homogeneisation et plasticite de plaques minces
Keywords:
homogenization, periodic plates, plasticity, limit loads and criteria, numerical modelling, finite elementsAbstract
This work is an illustration of tire homogenization of metallic periodic plates in tire plastic range. The determination of the macroscopic yield surface is reduced to threedimensional problems, set on a basic cell. The macroscopic limit loads (m embrane and bending efforts) are computed by the finite element method. When the plate is considered orthotropic and symmetric with respect to the middle surface, a limit loads criterion is proposed with an identification method of its parameters. This approach is validated for an homogeneous isotropic plate and the identification of the criterion for a honeycomb plate gives satisfying results.
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