Abstract
Quasi-static and dynamic three-point bending tests were conducted to investigate the effect of loading rate on flexural strength and fracture mechanism of two types of Aluminosilicate glass specimens, i.e., annealed and chemically strengthened (CS). Dynamic tests were performed on Electromagnetic Split Hopkinson Pressure Bar (ESHPB), and a hybrid experimental-numerical methodology was adopted for analyzing results. It was established that the flexural strength of both glass types is rate sensitive. Synchronous in-plane and out-of-plane reprography revealed that cracks propagate much faster along in-plane than out-of-plane direction. The Crack system adheres to an organized “V” shape pattern, and the locus of crack initiation is also found different for both types of glasses. For annealed and CS glass, crack initiated from the dominant flaws of the tensile surface and the tensile edge, respectively. Fractography was performed to explain the characteristic features of the crack evolution process from a microscopic to a macroscopic perspective.
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