Benedikt Kriegesmann, Raimund Rolfes, Eelco L. Jansen, Isaac Elishakoff, Christian Hühne, Alexander Kling
|Titel:||Design Optimization of Composite Cylindrical Shells Under Uncertainty|
Four different approaches for the design of axially compressed cylindrical shells are presented, the knockdown factor (KDF) concept, the single buckle approach, a probabilistic design procedure and the convex anti-optimization approach. The different design approaches take the imperfection sensitivity and the stochastic scatter of input parameters into account differently. In this paper, the design of a composite cylinder is optimized considering the ply angles as design variables. The KDF concept provides a very conservative design load and in addition an imperfection sensitive design, whereas the other approaches lead to a significantly less conservative design load and to a less imperfection sensitive design configuration. For the approaches that take into account measured imperfection data, the influence of the way in which the randomness of the input parameters is included on the optimal design configuration is clarified.