Calibration of cohesive parameters for a castable refractory using 4D tomographic data and realistic crack path from in-situ wedge splitting test

Autor(es)

Vargas, R. ; Canto, R. B. ; Smaniotto, B. ; Hild, F.

• Tipo de documento: Artigo Científico
• Fonte: Journal of the European Ceramic Society; v. 43, n. 2, p. 16-pg., 2023-02-01.

Resumo

Crack propagation in an alumina castable refractory with mullite-zirconia aggregates was investigated in-situ using a wedge splitting test performed inside a laboratory tomograph. Four-dimensional (i.e., 3D space and time) data from digital volume correlation were used to investigate the influence of a realistic crack path on the simulation of the fracture process. A cohesive law was chosen, since toughening mechanisms were present, and calibrated via finite element model updating. When a straight crack path was assumed instead of the experimental crack path, a 10% higher fracture energy and a 35% higher cohesive strength were calibrated. Although the force alone could be used in the minimized cost function, the kinematic information gives valuable insight into the trustworthiness of the geometrical hypotheses assumed in the finite element model. Such framework can be applied to study nonlinear fracture processes for different materials with complex toughening mechanisms such as crack deflection or branching. (AU)

• Processo FAPESP: 18/23081-0 - Análise dos mecanismos de fratura de refratários a temperatura ambiente e elevadas com o método da cunha e correlação de imagens
• Beneficiário: Rafael Vargas Maginador
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 21/09238-6 - Identificação da região de processo de fratura 3D para materiais refratários com correlação de volumes digitais combinada ao método dos elementos finitos
• Beneficiário: Rafael Vargas Maginador
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 20/08077-6 - Análise da fratura de refratários em altas temperaturas via simulação computacional e correlação de imagens digitais
• Beneficiário: Rodrigo Bresciani Canto
• Modalidade de apoio: Auxílio à Pesquisa - Regular