The paper aims at denoting ongoing efforts for development of accurate and stable entirely Lagrangian meshfree FSI solvers towards reproduction of hydroelastic slamming on composite marine panels. For this purpose, two SPH-based structure models, namely Updated Lagrangian SPH (ULSPH) and Hamiltonian SPH (HSPH), are investigated for the simulation of composite materials with comprehensive discussions about the approaches to enhance their performance, i.e. inclusion of stress point integration concept resulting in ULSPH-SP structure model. After the validations of structure models, the structure models are coupled with a refined Incompressible SPH (ISPH) fluid model for the configuration of entirely Lagrangian meshfree FSI solvers. Validation of the FSI solvers is carried out through an FSI benchmark test for which theoretical solution exists. The FSI solvers are finally applied to the slamming simulation corresponding to a composite marine panel, where the accuracy and stability of the solvers are examined.
The precise estimation of interactions between fluids and deformable structures have been of key importance in coastal/ocean engineering applications. In specific, in line with the advancement of technology in composite materials leading to lightweight elastic structures, the reliable computational modelling of hydroelastic slamming between fluid and composite deformable structures have become considerably significant. As for the numerical modelling, Lagrangian mesh-free computational methods (particle methods; Gotoh and Khayyer, 2018; Gotoh, 2018), represented by Smoothed Particle Hydrodynamics (SPH; Gingold and Monaghan, 1977) or Moving Particle Semi-implicit (MPS; Koshizuka and Oka, 1996), would bring advantageous contributions in fluid and structure dynamics with complex moving boundary conditions and mutual Fluid-Structure Interaction (FSI), as presented in a lot of recent studies (e.g. Liu and Zhang, 2019; Luo et al., 2021; Gotoh et al., 2021; Lyu et al., 2022). On the other hand, numerical modelling of FSI with composite structures has been very rarely studied within the framework of particle method.