Nonlocal general particle dynamics for fluid-structure interaction problems considering the structural failure

Modeling the structural failures induced by fluid-structure interaction (FSI) are crucial because it dominates many engineering problems. In this paper, a nonlocal general particle dynamic (NGPD) method is proposed to solve the FSI problems considering the structural failure. In this framework, the governing equations for fluid and solid are reformulated by introducing nonlocal theories. The tensile strength criterion is introduced to simulate crack initiation and propagation. A coupled strategy is proposed to calculate the interaction forces in the fluid-structure interface. The different particle spacings are utilized to discretize the fluid and solid computational domains to enhance the accuracy of modeling structural failure. A series of benchmark examples involving fluid and solid, and FSI models, are studied to demonstrate the accuracy, robustness, and stability of the proposed method. Subsequently, the failure of a tank floor under hydrostatic pressure and the Koyna Dam are illustrated to demonstrate the efficacy and versatility of the method in modeling structural failure induced by FSI. The numerical results demonstrate that the proposed NGPD framework is suitable for simulating fluid-structure interaction problems considering the structural failure.