Fracture Model for Brittle Material Under the Thermal Loads

Model of the formation and evolution of cracks in brittle materials was considered. Smeared crack model allowing to describe the material fracture in the framework of continuum mechanics assumptions has been used. Accounting of cracks leads to weakening of effective strength properties of the material. The model examined in a two-dimensional plane and axisymmetric approximations. Smeared crack approach is applicable to model the behavior of fuel pellets based on uranium dioxide. The calculation results are physically consistent.

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