Implementation of Creep-Damage Model for Concrete Fracture in MOOSE
[4];
- Arizona State Univ., Mesa, AZ (United States); Indian Inst. of Technology (IIT), Kanpur (India)
- Arizona State Univ., Mesa, AZ (United States)
- Arizona State Univ., Mesa, AZ (United States); Pune University (India)
- Idaho National Laboratory (INL), Idaho Falls, ID (United States); Univ. of Colorado, Boulder, CO (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)
- Univ. of California, Los Angeles, CA (United States); Purdue Univ., West Lafayette, IN (United States)
- Arizona State Univ., Mesa, AZ (United States); Univ. of Iowa, Iowa City, IA (United States)
- Arizona State Univ., Mesa, AZ (United States); Purdue Univ., West Lafayette, IN (United States)
Numerical implementation of an isotropic creep-damage model for concrete in multiphysics object-oriented simulation environment (MOOSE) finite element framework is presented in this paper. The constitutive model considers the combined effect of instantaneous and delayed strains on damage propagation. The implementation considers creep using generalized Maxwell or Kelvin-Voigt models. Using strain splitting assumptions, the total mechanical strains are split into elastic and creep components. Damage is considered to evolve as a function of the elastic and creep strains. This work considers damage as a function of fracture energy using the characteristic length of each finite element. This approach preserves the energy release rate of each element and avoids vanishing energy dissipation as the mesh is refined. Further, a creep-damage parameter is used to quantify the effect of creep strain on damage. The model is tested against published results on notched three-point bending specimens involving non-linear creep and predicts that about a third of the creep strain contributes towards damage for the experiments simulated. Results show that the proposed framework has predictive capabilities, and the model can be extended for more complex systems.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- Grant/Contract Number:
- AC07-05ID14517; NE0008398; AC05-00OR22725
- OSTI ID:
- 2305524
- Report Number(s):
- INL/JOU-19-56645-Rev000
- Journal Information:
- ACI Materials Journal, Vol. 117, Issue 6; ISSN 0889-325X
- Publisher:
- American Concrete InstituteCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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