SM24S_12679:Thu:1515:123
XXI International Congress of Theoretical and Applied Mechanics
Warsaw, Poland, August 15-21, 2004

DSA for Elastic - Plastic Finite Rotation Shells under Dynamic Loads

K. Wisniewski, Piotr Kowalczyk, Ewa Turska
Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland


The paper describes a constitutive algorithm for elastic-plastic finite rotation shells and explicit dynamics with design derivatives calculated w.r.t. material parameters. Despite a great complexity of the solution algorithm for the finite rotation elastic-plastic shells, we show that it is feasible to compute analytical design derivatives of this algorithm, including in particular the very complicated design derivative of the internal force vector. We show on several computational examples that the yielded sensitivities are of very good accuracy.



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