Willmann, TobiasBieber, SimonBischoff, Manfred2023-10-052023-10-0520221097-02070029-59811867483416http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-135720http://elib.uni-stuttgart.de/handle/11682/13572http://dx.doi.org/10.18419/opus-13553We show that most geometrically nonlinear three‐dimensional shell elements and solid shell elements suffer from a previously unknown artificial stiffening effect that only appears in geometrically nonlinear problems, in particular in the presence of large bending deformations. It can be interpreted as a nonlinear variant of the well‐known Poisson thickness locking effect. We explain why and under which circumstances this phenomenon appears and propose concepts to avoid it.eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/624article2023-04-20