第二部門：計算力学（D）

[S02D-01] A new transition model between continuum damage and cohesive crack models

*Hiroyasu Miura¹, Shun SUZUKI¹, Shuji MORIGUCHI¹, Kenjiro TERADA¹ (1. Tohoku University)

Keywords:Isotropic damage model, Discrete crack model, Cohesive crack model, Traction-separation law, Fracture energy, Equivalent strain

This paper proposes a new transition theory between continuum damage and cohesive crack models to simulate crack propagation in concrete structures. The fracture energies represented by these two separate models are made equal so that the crack representation of the former is seamlessly transitioned to that of the latter. Specifically, the identity relations of the energies are derived to determine the parameters of the cohesive model. Several numerical examples are presented to verify the formulation and demonstrate the promise of the resulting method crack propagation analyses to be extended to multistage failure simulations.