 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

No abstract

No abstract

A ring-on-ring test configuration for the equibiaxial flexural testing of flat samples was developed and integrated into a novel modified split-Hopkinson pressure bar (SHPB) setup. The established modifications enabled the application of high-speed cameras for fracture assessment and non-contact displacement measurements using stereo digital image correlation (stereo-DIC). In the present paper, this setup was utilised to characterise the flexural surface strength and stiffness (Young's modulus) of circular, as-received soda-lime-silica glass samples at high strain rates. The effect of residual stresses was also studied by including thermally tempered glass samples divided into four residual stress groups. Despite the frequent application of glass products in the built environment, often post-processed into tempered or laminated glass, these investigations are still rare and thus highly demanded when designing for extreme events such as extreme weather, ballistic impacts, or blast loads. A total of 315 samples were tested at a quasi-static and a dynamic loading rate ranging from 2.0 MPa s -1 to 4.2·10 6 MPa s -1 . It was found that the flexural strength of the glass across residual stress groups was strongly dependent on the applied dynamic loading rate, while the residual stresses themselves showed no significant effect on the loading rate dependency. At the dynamic loading, the strength increased between 60 and 86 %. Within the two tested loading rates, strength increased expectedly with compressive surface stress. From the stereo-DIC displacement measurements, no change in Young's modulus with loading rate was observed.