Comparison of different constitutive models for concrete in ABAQUS/explicit for missile impact analyses

This EUR report describes numerical missile impact analyses on a reinforced concrete slab performed at JRC-IE using the Finite Element (FE) solver ABAQUS/Explicit. The FE model of the impacted reinforced concrete slab resembles a structure used in the missile impact tests by Hanchak et al. FE analyses with a hard (rigid) and a soft (deformable) missile are performed. Traditional Lagrangian formulation for both the missiles and reinforced concrete slabs are used. Two different build-in constitutive models for concrete in ABAQUS/Explicit, the Brittle Cracking Model and the Concrete Damaged Plasticity Model, are compared with each other and their suitability and limitations for missile impact analyses are explored. It turns out that only the Concrete Damaged Plasticity Model in combination with a soft missile leads to physically reasonable and sound results in terms of strains/stresses of the reinforced concrete slab, overall energy balances and overall deformation of the concrete slab when a traditional Lagrangian formulation is used for both missile and reinforced concrete slab.