Mat-1.600 Laskennallisen tieteen ja
tekniikan seminaari
4.10.2004 klo
14.15
U356
Petri Kere,
CSC
Reissner-Mindlin-von Kármán type plate model for nonlinear
analysis of
laminated composite structures
Composite materials are desirable in lightweight structures due to
their high specific stiffness and strength, and due to their
dimensional stability under hygrothermal loads. Laminated composites
provide the designer with freedom to tailor mechanical properties and
load response of the structure to obtain the maximum efficiency in
weight.
Non-linear analysis of laminated composite structures using
Reissner-Mindlin-Von Kármán type plate model is
considered. The potential energy functional where the linearized strain
tensor has been replaced by nonlinear functions, i.e., the Von
Kármán model for large deformation is formulated.
In the FE-implementation linear triangular elements are used. The
transverse shear strains are discretized by the stabilized
MITC-technique of Brezzi, Fortin, and Stenberg. Load-displacement
behavior of the structure as well as the failure prediction and the
identification of the critical areas of the model are illustrated with
numerical examples.