ُSimulation dynamic response of concrete slab sandwich plate under close-range blast loading based on the CEL method

In this tutorial, the ُSimulation dynamic response of concrete slab sandwich plate under close-range blast loading based on the CEL method has been studied. The concrete slab, TNT, and Eulerian domain are modeled as three-dimensional parts. The steel beams are modeled as shell parts. The steel bars are modeled as wire parts. You can see a figure of the assembled parts below

In recent years, there has been a rise in bombing terrorist attacks and accidental explosions worldwide. Recently, a new type of building Concrete slab-steel beam, has been proposed.  The Coupled Eulerian-Lagrangian (CEL) method is a numerical approach that combines the Eulerian and Lagrangian finite element methods to address fluid-structure problems. By leveraging the strengths of both methods, the CEL method effectively models the motion and interaction of objects within a flow field. It excels in handling complex solid surfaces, fluid-structure interfaces, and multi-physics field coupling problems, accurately describing object shapes, boundary conditions, large deformations, and displacements. Moreover, the CEL method is proficient in simulating material deformation processes and can effectively tackle coupled fluid flow and solid mechanics problems, capturing diverse fluid behaviors like turbulence and vortices. Employing high-precision numerical algorithms, the CEL method ensures the stability and accuracy of numerical solutions in solving fluid and solid mechanics equations

To model steel parts behavior, the Johnson-Cook hardening and damage are used. The Johnson-Holmquist brittle model is considered to define concrete behavior under severe load. The JWL equation of state is used to define the TNT explosive material

Dynamic explicit steps with general contact capability and some to perform this simulation are considered. The proper boundary conditions and meshes are assigned to all parts

After the simulation, all results such as stress, strain, damage, failure, deformation, blast wave propagation, TNT pressure, and others are available. You can see some figures of the results below