Abstract
In this paper a continuum based 3DВ–shell element for the nonlinear
analysis of laminated shell structures is derived. The basis of the
present finite element formulation is the standard 8В–node brick
element with triВ–linear shape functions. Especially for thin structures
under certain loading cases the displacement based element is too
stiff and tends to locking. Therefore we use assumed natural strain
and enhanced assumed strain methods to improve the relative poor
element behaviour. The anisotropic material behaviour of layered
shells is modeled using a linear elastic orthotropic material law
in each layer. Linear and nonlinear examples show the applicability
and effectivity of the element formulation.
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