A fully Lagrangian formulation for fluid-structure interaction problems with free-surface flows and fracturing solids

This paper presents a novel coupled formulation for fluid-structure interaction (FSI) problems involving free-surface fluid flows, fracture phenomena, solid mutual contact and large displacements. The numerical combines three different Lagrangian computational methods. Particle Finite Element Method (PFEM) is used to solve the flow, (FEM) with smoothed isotropic damage model employed solution of structures debris, finally, Discrete (DEM) manage between boundaries, including new ones generated by propagating cracks. proposed method has high potential prediction structural damages on civil constructions caused natural hazards, such as floods, tsunami waves or landslides. Its application field can also be extended phenomena in soils/rocks arising from explosions hydraulic fracking processes. Several examples are presented show validity accuracy technique proposed.