Stabilized Hyper-Elastic Solid-Shell formulation for Embedded Fluid-structure interaction problems
Please login to view abstract download link
This work presents a numerical framework designed to solve Fluid-Structure Interaction problems involving thin structures undergoing large deformations. The method employs an embedded mesh approach to create a coupling interface between the fluid and structural domains. A key innovation of this work is the integration of a newly developed, locking-free Variational Multiscale stabilized formulation for solid-shell elements in Finite Strain theory. The framework utilizes proven methods to manage pressure discontinuities in the fluid domain across the embedded interface and to apply boundary conditions. This includes using discontinuous shape functions for the pressure variables to separate nodal contributions in cut elements and employing Nitsche's method for the weak enforcement of transmission conditions in the fluid. The results confirm the framework's effectiveness for solving Fluid-Structure Interaction problems involving thin structures undergoing large deformations.