Abstract
For the numerical analysis of large scale CCS structures isotropic finite shell elements could be applied. However, due to the complex panel cross sections, a detailed modelling of the isotropic face sheets and the interior stiffeners is required, which leads to either huge or too coarse FE-meshes. In order to reduce the modeling input as well as computational requirements, effective, i.e., homogenized, orthotropic shell elements have been developed allowing substantial reduction of degrees of freedom by taking the detailed geometry implicitly into account. These thick shell elements are based on analytical approaches for predicting the complete orthotropic mechanical response of the investigated CCS panels. This paper aims, on the one hand, to present and verify the analytical stiffness approaches and, on the other hand, to show that the application of effective orthotropic shell finite elements significantly increases the efficiency of the analysis of CCS structures.
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