IGA-PD penalty-based coupling for immersed air-blast fluid-structure interaction: a simple and effective solution for fracture and fragmentation

We present a novel formulation for the immersed coupling of isogeometric analysis and peridynamics for the simulation of fluid-structure interaction (FSI). We focus on air-blast FSI and address the computational challenges of immersed FSI methods in the simulation of fracture and fragmentation by developing a weakly volume-coupled FSI formulation by means of a simple penalty approach. We show the mathematical formulation and present several numerical examples of inelastic ductile and brittle solids under blast loading that clearly demonstrate the power and robustness of the proposed methodology.