Institute of Physics of Materials AS CR, v. v. i. > Projects > Fracture of silicate based composites studied on core drilled specimens – numerical-modeling background for advanced fracture parameters determination

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Fracture of silicate based composites studied on core drilled specimens – numerical-modeling background for advanced fracture parameters determination

Anotace

The subject of the proposal is the description of fracture behavior of structures made of silicite composites based on tests utilizing configurations and specimen shapes that are practicable to obtain from existing structures – cylindrical cores removed from the structure by drilling. Emphasis will be put to evolvement of techniques for processing of records of experimental tests on notched bodies with respect to the influence of following factors: testing configuration (shape of the body and boundary conditions), specimen size, and shape and length of the notch. Tools of two parameter fracture mechanics will be employed. These techniques will be investigated via numerical simulations using computational programs with implemented linear and nonlinear fracture models. Reasonability of performed 2D and 3D FE simulations of fractures will be verified by experiments in selected suitable testing configurations, e.g. wedge splitting on core drilled specimens and three point bending.