Abstract
This paper presents a finite strain isotropic damage model for finite deformation FE analyses of crack propagations in concrete and reinforced concrete. The modified von-Mises criterion is extended to finite deformation problem for evaluating damage. The evolution of the damage variables is defined as the traction — separation law which is based on fracture mechanics for concrete. We first show the formulation of the proposed finite strain damage model with the modified von-Mises criterion. Several numerical experiments are presented for verification and validation of the proposed model. The mesh sensitivity in crack propagation FE analyses is verified in 1-D and 3-D problems. The FE numerical results with the damage model are then compared with the own experimental test results of 4-point bend test of RC beam without shear reinforcements.
