Comparison of Different Element Types for Modelling the Sandwich Panels in theStructure of the SIMONA Simulator and a Proposal for a New Element Type to Do This

摘要

In the SIMONA structure a lot of sandwich panels are used. In the first finiteelement model of this structure these sandwich panels were model with the Shell63-elements of Ansys with a certain correction factor to account for the difference in bending stiffness between monolithic and sandwich shells. In order to get a more accurate model Shell91-elements are now used. These elements are layered shell elements and can be build up with up to 16 orthotropic layers. In this paper these elements and a few more will be tested to see whether they really behave like sandwich panels and if not suggestions are made to improve accuracy. In Ansys 5.0A the Shell91 element has a sandwich option. Of course this element is tested too.