Xie, FengzeFengzeXieZhang, JianJianZhangLi, YifanYifanLiWan, DechengDechengWanAbdel-Maksoud, MoustafaMoustafaAbdel-Maksoud2025-12-172025-12-172026-01-15Ocean Engineering 343: 123345 (2026)https://hdl.handle.net/11420/60282In this paper, an in-house solver MPSPD-SJTU is developed to address 3D Fluid-Structure Interaction (FSI) problems with fracture. The Moving Particle Semi-implicit (MPS) method is utilized to simulate the violent free-surface flows while the PeriDynamics (PD) method is employed to model the structures with large deformations and fractures. Besides, a Kernel Function Based Interpolation Technique (KFBI) is incorporated into the coupling method to handle the MPS particles and PD particles with different resolutions. Firstly, the MPS solver is utilized to simulate dam break flow impacting a fixed obstacle, serving to evaluate its accuracy and reliability. Subsequently, the PD-based structural solver is validated by simulating an oscillating cantilever plate, a clamped-clamped elastic beam under uniformly distributed load, the Kalthoff-Winkler impact test, and three-point bending of an ice beam. Next, the MPS-PD model is validated via some benchmark tests, such as flood discharge with an elastic plate, hydrostatic water column on an elastic plate, dam-break flow with a hanging elastic plate, as well as dam-break flow with an elastic obstacle. The numerical results obtained in this study exhibit good agreement with experimental data as well as those from other numerical methods. Finally, the coupling model is applied to investigate the dam-break flow impacting a hanging elastic plate with a prefabricated crack.en0029-80182026Fluid-structure interactionMoving particle semi-implicit methodMulti-resolutionPeridynamicsThree dimensional simulationsTechnology::600: TechnologyTechnology::621: Applied Physics::621.8: Machine EngineeringTechnology::623: Military Engineering and Marine EngineeringJournal Article10.1016/j.oceaneng.2025.123345Journal Article