Wrinkling of thick orthotropic sandwich plates under general loading conditions

This contribution presents an efficient analytical model as well as a FE co mputation of the critical load, which leads to local stability failure (wri nkling) in sandwich structures. The analytical model assumes an orthotropic face layer and a thick transversely isotropic core. Tn the last section, a more general core material model is considered. Common core materials (foa ms and honeycombs) can be described with good accuracy within this model. T he main advantage of the solution is the consideration of general loading c onditions for the orthotropic face layer as well as in-plane deformations o f the core. The results of the FE calculations and the analytical model are in good agreement with each other.