Dynamic damage and failure model for concrete materials

A new dynamic damage and failure model for modeling penetration into concrete or reinforced concrete materials is presented based on TCK damage model. The model includes two parts: tensile damage described by TCK model and shear failure by RHT model. Nonlinear strain hardening, pressure and J₃ dependent failure surface, strain softening, tensile and compressive damage and strain rate effects are accounted in the model. The model is implemented through a user defined material model in LS-DYNA. The model parameters are calibrated and validated by the data from related concrete penetration tests. The calculated result shows that the model can predict craters, perforation and post perforation scabbing from the inner face of tunnel and back face of target during penetration into concrete or reinforced concrete materials. The calculated residual velocity of the penetrator agrees well with the test data.