In this tutorial, the Simulation of steel projectile impact to the Reinforced-Ultra-High-Performance Concrete- Damage investigation has been investigated. The Ultra-High-Performance Concrete is modeled as the three-dimensional solid part, the embedded beam parts are modeled as a three-dimensional wire part, and finally, the steel projectile is modeled as a solid part. You can see a figure of the assembled parts below
In recent modern structures, the UHPC slab is used because of its high compressive strength. The Concrete Damaged Plasticity Model (CDPM) was used for defining the two main mechanisms of concrete failure: tensile cracking and compressive crushing. The CDPM was fed stress-strain values in the compression and tension, relying on the test compressive strength of concrete. The CDP model is not appropriate for the impact, especially high-velocity impact. To have proper behavior under high string load, we should use a new material model for the UHPC which is available from the input files as writing codes, or vumat subroutine. For the steel bars and projectile, elastic-plastic behavior with the damage model such as ductile, and shear are selected.
The dynamic explicit step is selected for this analysis. The general contact capability with contact property is used to consider all contacts in the contact domain. The steel reinforcements are embedded inside the concrete slab. The fixed boundary condition is assigned to two sides of the slab and the initial velocity is assigned to the rigid impactor. The mesh should be fine to obtain correct results
After the simulation, all results such as stress, strain, failure, damage, penetration of the impactor, and… are available. you can see some figures for the results below
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