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Simulation SPH explosion over a composite column(Steel cover+Concrete+CFRP I shape beam) in Abaqus has been investigated in the present tutorial. The steel cover and CFRP I shape beam are modeled as three-dimensional shell parts. The concrete and TNT are modeled as three-dimensional solid parts. You can see a figure of the assembled parts below
To model steel box behavior under severe load, the Johnson-Cook hardening and damage are selected. The Johnson-Cook model is a plasticity model that is based on Mises plasticity with closed-form analytical equations specifying the hardening behavior and the strain-rate dependence of the yield stress.
The Jones-Wilkins-Lee (JWL) equation of state (EOS) has long been used to accurately calculate the Chapman – Jouguet (C-J) state of condensed phase explosive detonation waves and the subsequent expansion of the reaction products as they do work on surrounding materials. This material model is selected to convert chemical energy during the explosion to mechanical pressure.
In solid mechanics, the Johnson–Holmquist damage model is used to model the mechanical behavior of damaged brittle materials, such as ceramics, rocks, and concrete, over a range of strain rates. Such materials usually have high compressive strength but low tensile strength and tend to exhibit progressive damage under load due to the growth of microfracture. The JH2 model is used to define concrete in this tutorial
The Hashin criterion identifies four different modes of failure for the composite material. The four modes are tensile fiber failure, compressive fiber failure, tensile matrix failure, and compressive matrix failure. To model the CFRP I shape beam, the Hashin damage model is considered.
Dynamic explicit steps, perfect and general contact algorithms, proper boundary conditions, and meshes are selected for all parts
After the simulation, all results such as stress, strain, damage, failure, detonation wave, deformation, and others are available. You can see some figures for the results below
