Abstract
<title>Abstract</title> <p>A novel method combining the continuum-discontinuum method and the smoothed particle hydrodynamics (SPH) method is proposed to simulate fluid-solid interaction problems. In the proposed method, the deformation, cracking, contact, and motion of solid are depicted using the continuum-discontinuum method, and the flow of fluid is depicted using the SPH method. The method integrates the advantages of both grid methods and meshless methods. There is no need to insert interface elements before cracking, and no need to reconstruct the mesh after cracking. To validate the proposed method, two scenarios (a dam break through an elastic gate, and a breaking dam impacting on a plate) were simulated. The results obtained using this method are in good agreement with those from both experimental and numerical methods. For the water inrush scenario near a fault, after the water-resisting structure is broken, under the action of fluid pressure, the solid moves to the left and the fluid flows out. The results show that the proposed method can simulate the cracking, contact, and motion of solid under the action of fluid.</p>