  In order to solve the fluid-structure interaction problem of Newtonian fluid,
a fluid-structure interaction approach is proposed based on Non-ordinary
State-based Peridynamics (NOSB-PD) and Updated Lagrangian particle
Hydrodynamics (ULPH), to simulate the fluid-structure interaction problem in
which large geometric deformation and material failure are considered. In the
coupled framework, the NOSB-PD theory is used to describe the deformation and
fracture of the solid material structure. ULPH is applied to describe the flow
of Newtonian fluids due to its advantages in computational accuracy. The
framework effectively utilizes the advantages of NOSB-PD theory for solving
discontinuous problems and ULPH theory for solving fluid problems and has good
computational stability and robustness. To deal with the interface of fluid
structure, a fluid-structure coupling algorithm using pressure as the
transmission medium is established. The dynamic model of solid structure and
the PD-ULPH fluid-structure interaction model involving large deformation are
verified by several numerical validations, which are in good agreement with the
analytical solution, the available experimental data and other numerical
results, that demonstrates the accuracy and effectiveness of the proposed
method in solving the fluid-structure interaction problem. Overall, the
fluid-structure interaction model based on ULPH and NOSB-PD established in this
paper provides a new idea for the numerical solution of fluid-structure
interaction and a promising approach for engineering design and experimental
prediction.
