Evaluation of constitutive models of hybrid-fibre engineered cementitious composites under dynamic loadings

In this paper, several widely used material models for plain concrete under dynamic loading, especially the Concrete Damage model and the Elastic–Plastic Hydrodynamic model are evaluated so as to determine an appropriate material model for engineered cementitious composite (ECC) materials under dynamic loading. The effects of size effect, strain rate effect and the specific equation of state on the dynamic material behaviour are investigated using numerical modelling method. A material model which is appropriate to simulate the dynamic behaviour of ECC materials is established based on the Concrete Damage model. The proposed material model is validated via numerical simulation of the impact process of a hybrid-fibre ECC slab struck by a high-velocity projectile. Advantages and limitations of other material models for dynamic behaviours of ECC materials are also compared and commented in this paper.

► Establish an appropriate material model for ECC materials under dynamic loading.
► Evaluate several widely used material models for concrete under dynamic loading.
► Investigate the effects of element size, strain rate, EOS on the dynamic behaviour.
► Conduct numerical simulation of a hybrid-fibre ECC slab under high velocity impact.
► Compare the advantages and limitations of other material models for ECC materials.