Abstract
A novel ring-on-ring test setup was developed for investigating the biaxial flexural strength of small circular soda–lime–silica glass specimens at high loading rates in a high-speed test rig. Such rate effects becomes important when designing for extreme events such as impact and blast, which are highly relevant for glass used in e.g. façades. The investigation focused on two groups of specimens with different surface conditions: as-received and pre-damaged with a well-defined flaw. A total of 151 specimens were tested in order to evaluate the influence of loading rate and surface condition on the flexural strength. Quasi-static and dynamic experiments were performed at loading rates ranging between 2 and \(5.6\times 10^6\hbox { MPa/s}\). An 85% increase in strength with loading rate was observed for the ‘as-received’ specimens and 52% for the ‘pre-damaged’.
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Acknowledgements
The authors acknowledge the research team of Prof. Dr.-Ing. J. Schneider from the Institute of Structural Mechanics and Design at TU Darmstadt, who has helped to pre-damage a number of the investigated glass specimens. Also, the authors are truly grateful to Z. I. Balogh from DTU CEN (Center for Electron Nanoscopy) for performing the SEM/EDS analysis.
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Appendix A: Full experimental results
Appendix A: Full experimental results
The experimental results of this study are listed in Table 3 for the as-received specimens and Table 4 for the pre-damaged ones, where the thickness of each specimen is given along with the target piston velocity, \(v_p\), the recorded peak load, F, and the applied loading rate, \({\dot{F}}\).
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Meyland, M.J., Bønding, C.K.T., Eriksen, R.N.W. et al. An experimental investigation of the flexural strength of soda–lime–silica glass at high loading rates. Glass Struct Eng 4, 175–183 (2019). https://doi.org/10.1007/s40940-018-0089-2
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DOI: https://doi.org/10.1007/s40940-018-0089-2