Nonlinear Analysis of Shells by Finite Elements
pp. 131-194, 1992
F.G. Rammerstorfer¹, K. Dorninger² and A. Starlinger³
¹Institute of Lightweight Structures and Aerospace
TU Wien, Vienna, Austria
²Saturn Corp., Troy, MI, USA
³NASA Lewis Research Center,
Cleveland, OH, USA
Finite shell elements for geometrically and materially nonlinear stress and
stability analyses of fibre reinforced composite shells as well as
sandwich shells with orthotropic core material are presented.
The element formulations are based on the degeneracy principle including
large displacements with an efficient thickness integration.
Some micromechanical models are discussed which allow the esitmation of
over-all material laws used in the shell analyses.
Examining suitable failure criteria and taking into account post-cracking,
post-wrinkling and post-buckling stiffnesses allow for the investigation of
Furthermore, anisotropic plasticity effects are taken into account for
consideration of metal matrix composite (MMC) shells.
Some computed expamples and comparisons with experimental results illustrate
that an extended range of composite specific problems can be covered by
these laminated and sandwich elements.