A new mixed isogeometric approach to Kirchhoff-Love shells
Abstract
For Kichhoff-Love shell problems a new mixed formulation solely based on standard H1 spaces is presented. This allows for flexibility in the construction of discretization spaces, e.g., standard C0-coupling of multi-patch isogeometric spaces is sufficient. In terms of solution strategies, for iterative solvers efficient methods for standard second-order problems like multigrid can be used as building blocks of a preconditioner. Furthermore, a combination of the proposed mixed formulation of the bending part with a popular mixed formulation of the membrane part in order to avoid membrane locking is considered. The performance of both mixed formulations is demonstrated by numerical benchmark studies.
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