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We present a novel formulation for the immersed coupling of IsogeometricAnalysis (IGA) and Peridynamics (PD) for the simulation of fluid-structureinteraction (FSI). We focus on air-blast FSI and address the computationalchallenges of immersed FSI methods in the simulation of fracture andfragmentation by developing a weakly volume-coupled FSI formulation by means ofa simple penalty approach. We show the mathematical formulation and presentseveral numerical examples of inelastic ductile and brittle solids that clearlydemonstrate the power and robustness of the proposed methodology.

IGA-PD Penalty-Based Coupling for Immersed Air-Blast Fluid-Structure Interaction: A Simple and Effective Solution for Fracture and Fragmentation