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Published in:
2005 | OriginalPaper | Chapter
Two Fe Formulations for a Rapid 3D Stress Analysis of Composite Sandwich Structures
Authors : Anja Wetzel, Luise Kärger
Published in: Sandwich Structures 7: Advancing with Sandwich Structures and Materials
Publisher: Springer Netherlands
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A rapid 3D stress analysis of sandwich structures made from composite face sheets and a lightweight core is needed for an efficient simulation of impact damage tolerance and resistance. For that reason, two finite shell element formulations based on layer-wise theories are developed using pure displacement approaches. The number of layers is confined to three, one for each skin laminate and one for the core, accounting for the very different stiffness of skin and core material. In order to obtain reasonable transverse shear stiffness properties and also improved transverse shear and normal stresses the equilibrium approach by Rolfes and Rohwer [1] is extended to a three-layered sandwich structure.