Investigation of the biaxial flexural fracture of aluminosilicate glass by smeared fixed crack method

Ball-On-Ring (BOR) and Ring-On-Ring (ROR) tests are experimental methods used to characterize biaxial flexural strength of brittle materials. In this study, the quasi-static biaxial fracture behavior of aluminosilicate glass is investigated via BOR and ROR tests aided by a three-dimensional Digital Image Correlation (3D-DIC) technique. The in-plane strain field and out of plane deformation distribution during the loading process can be obtained by this special-designed test system. A finite element modeling approach incorporating smeared crack model is chosen to represent the discontinuous macrocrack brittle behavior of aluminosilicate glass. The simulations are conducted using the commercial software LS-DYNA with the implemented material model MAT280_GLASS. This numerical method is carefully assessed, and the capability of this model is evaluated by comparing the results of the numerical simulations with the corresponding experimental results.