Numerical analysis of sandwich panels subjected to torsion

The chapter presents the problem of sandwich panel torsion. Theoretical solutions for beams (1-D elements) and results of numerical analyzes are presented. Two classes (2D and 3D) of numerical models are considered, and the results are compared with the theoretical results. The comparison mainly concerns the stresses in the facings and the core of sandwich structure. The biggest challenge was finding the appropriate boundary conditions (both support and load) for the different model classes. Once again it turned out that the question of boundary conditions is crucial to solving the problem, and that the class of these conditions should always correspond to the class of the model.